./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_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/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:27:03,010 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:27:03,070 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:27:03,074 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:27:03,075 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:27:03,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:27:03,097 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:27:03,097 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:27:03,098 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:27:03,101 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:27:03,101 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:27:03,101 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:27:03,102 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:27:03,103 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:27:03,103 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:27:03,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:27:03,104 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:27:03,104 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:27:03,104 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:27:03,104 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:27:03,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:27:03,105 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:27:03,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:27:03,105 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:27:03,105 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:27:03,106 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:27:03,106 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:27:03,106 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:27:03,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:27:03,107 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:27:03,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:27:03,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:27:03,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:27:03,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:27:03,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:27:03,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:27:03,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:27:03,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:27:03,109 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:27:03,109 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:27:03,109 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:27:03,109 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:27:03,109 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:27:03,109 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:27:03,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:27:03,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:27:03,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:27:03,356 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:27:03,357 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:27:03,358 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:27:04,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:27:04,469 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:27:04,470 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:27:04,480 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/709dba1d9/c7289b81a779448db3ac89368b4a447e/FLAG3aa36636a [2024-06-20 15:27:04,490 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/709dba1d9/c7289b81a779448db3ac89368b4a447e [2024-06-20 15:27:04,492 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:27:04,492 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:27:04,493 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-20 15:27:04,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:27:04,584 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:27:04,585 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:27:04,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:27:04,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:27:04,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:27:04" (1/2) ... [2024-06-20 15:27:04,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4901505f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:27:04, skipping insertion in model container [2024-06-20 15:27:04,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:27:04" (1/2) ... [2024-06-20 15:27:04,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@710b5eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:27:04, skipping insertion in model container [2024-06-20 15:27:04,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:27:04" (2/2) ... [2024-06-20 15:27:04,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4901505f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:04, skipping insertion in model container [2024-06-20 15:27:04,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:27:04" (2/2) ... [2024-06-20 15:27:04,591 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:27:04,637 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:27:04,639 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 15:27:04,639 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 15:27:04,639 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 15:27:04,639 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:27:04,639 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-20 15:27:04,686 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:27:04,975 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:27:04,983 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:27:05,056 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:27:05,088 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:27:05,089 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05 WrapperNode [2024-06-20 15:27:05,089 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:27:05,090 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:27:05,090 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:27:05,090 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:27:05,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,110 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,127 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-20 15:27:05,128 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:27:05,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:27:05,129 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:27:05,129 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:27:05,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,140 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,160 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 15:27:05,161 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,166 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,167 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,168 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,169 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:27:05,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:27:05,182 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:27:05,182 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:27:05,183 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (1/1) ... [2024-06-20 15:27:05,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:27:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:27:05,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 15:27:05,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 15:27:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:27:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:27:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:27:05,290 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:27:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:27:05,290 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:27:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:27:05,290 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:27:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:27:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:27:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:27:05,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:27:05,291 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:27:05,408 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:27:05,410 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:27:05,546 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:27:05,546 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:27:05,639 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:27:05,639 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:27:05,640 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:27:05 BoogieIcfgContainer [2024-06-20 15:27:05,640 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:27:05,641 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:27:05,641 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:27:05,643 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:27:05,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:27:04" (1/4) ... [2024-06-20 15:27:05,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3524fedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:27:05, skipping insertion in model container [2024-06-20 15:27:05,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:27:04" (2/4) ... [2024-06-20 15:27:05,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3524fedb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:27:05, skipping insertion in model container [2024-06-20 15:27:05,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:27:05" (3/4) ... [2024-06-20 15:27:05,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3524fedb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:27:05, skipping insertion in model container [2024-06-20 15:27:05,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:27:05" (4/4) ... [2024-06-20 15:27:05,645 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:27:05,659 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:27:05,660 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:27:05,660 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:27:05,699 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:27:05,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:27:05,756 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 15:27:05,756 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:27:05,758 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 5. Compared 66 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. [2024-06-20 15:27:05,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:27:05,761 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 15:27:05,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:27:05,780 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;@41f9a80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:27:05,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:27:05,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:27:05,784 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:27:05,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:27:05,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:05,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:27:05,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:05,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:05,789 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-20 15:27:05,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:05,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976518457] [2024-06-20 15:27:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:05,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:06,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:06,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976518457] [2024-06-20 15:27:06,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976518457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:06,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:06,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:27:06,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842602997] [2024-06-20 15:27:06,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:06,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:27:06,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:06,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:27:06,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:27:06,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-20 15:27:06,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:06,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:06,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-20 15:27:06,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:06,438 INFO L124 PetriNetUnfolderBase]: 470/794 cut-off events. [2024-06-20 15:27:06,438 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-20 15:27:06,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 794 events. 470/794 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3834 event pairs, 281 based on Foata normal form. 1/747 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-20 15:27:06,450 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 15:27:06,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-20 15:27:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:27:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:27:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-20 15:27:06,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-20 15:27:06,462 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-20 15:27:06,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-20 15:27:06,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:06,467 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 15:27:06,469 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} [2024-06-20 15:27:06,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 15:27:06,472 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 15:27:06,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:06,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:06,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:06,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:27:06,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:06,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:06,474 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-20 15:27:06,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:06,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033346356] [2024-06-20 15:27:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:06,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033346356] [2024-06-20 15:27:06,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033346356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:06,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:06,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:27:06,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919532207] [2024-06-20 15:27:06,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:06,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:27:06,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:06,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:27:06,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:27:06,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-20 15:27:06,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:06,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:06,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-20 15:27:06,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:06,837 INFO L124 PetriNetUnfolderBase]: 594/1000 cut-off events. [2024-06-20 15:27:06,838 INFO L125 PetriNetUnfolderBase]: For 220/254 co-relation queries the response was YES. [2024-06-20 15:27:06,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2293 conditions, 1000 events. 594/1000 cut-off events. For 220/254 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5018 event pairs, 319 based on Foata normal form. 3/970 useless extension candidates. Maximal degree in co-relation 2281. Up to 901 conditions per place. [2024-06-20 15:27:06,843 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-20 15:27:06,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 246 flow [2024-06-20 15:27:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:27:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:27:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-20 15:27:06,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6890243902439024 [2024-06-20 15:27:06,847 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 113 transitions. [2024-06-20 15:27:06,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 246 flow [2024-06-20 15:27:06,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:27:06,850 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-20 15:27:06,851 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} [2024-06-20 15:27:06,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-20 15:27:06,851 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-20 15:27:06,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:06,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:06,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:06,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:27:06,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:06,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:06,855 INFO L85 PathProgramCache]: Analyzing trace with hash 627187612, now seen corresponding path program 1 times [2024-06-20 15:27:06,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:06,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934885684] [2024-06-20 15:27:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:06,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:07,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:07,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934885684] [2024-06-20 15:27:07,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934885684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:07,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:07,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:27:07,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64575716] [2024-06-20 15:27:07,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:07,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:27:07,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:27:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:27:07,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:07,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:07,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:07,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:07,184 INFO L124 PetriNetUnfolderBase]: 793/1310 cut-off events. [2024-06-20 15:27:07,184 INFO L125 PetriNetUnfolderBase]: For 692/726 co-relation queries the response was YES. [2024-06-20 15:27:07,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3343 conditions, 1310 events. 793/1310 cut-off events. For 692/726 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6666 event pairs, 430 based on Foata normal form. 2/1284 useless extension candidates. Maximal degree in co-relation 3328. Up to 1192 conditions per place. [2024-06-20 15:27:07,191 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2024-06-20 15:27:07,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 325 flow [2024-06-20 15:27:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:27:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:27:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-20 15:27:07,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-20 15:27:07,192 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 4 states and 109 transitions. [2024-06-20 15:27:07,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 325 flow [2024-06-20 15:27:07,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 323 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 15:27:07,194 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 226 flow [2024-06-20 15:27:07,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-06-20 15:27:07,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-20 15:27:07,195 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 226 flow [2024-06-20 15:27:07,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:07,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:07,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:27:07,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:07,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash 816716713, now seen corresponding path program 1 times [2024-06-20 15:27:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:07,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794095606] [2024-06-20 15:27:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:07,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:07,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:07,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794095606] [2024-06-20 15:27:07,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794095606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:07,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:07,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:07,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724664183] [2024-06-20 15:27:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:07,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:07,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:07,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:07,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:07,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:07,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:07,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:07,615 INFO L124 PetriNetUnfolderBase]: 879/1449 cut-off events. [2024-06-20 15:27:07,616 INFO L125 PetriNetUnfolderBase]: For 1441/1449 co-relation queries the response was YES. [2024-06-20 15:27:07,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4154 conditions, 1449 events. 879/1449 cut-off events. For 1441/1449 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7300 event pairs, 265 based on Foata normal form. 12/1454 useless extension candidates. Maximal degree in co-relation 4135. Up to 1266 conditions per place. [2024-06-20 15:27:07,625 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-20 15:27:07,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 79 transitions, 444 flow [2024-06-20 15:27:07,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 15:27:07,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-20 15:27:07,628 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 226 flow. Second operand 6 states and 158 transitions. [2024-06-20 15:27:07,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 79 transitions, 444 flow [2024-06-20 15:27:07,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 79 transitions, 442 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 15:27:07,634 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 286 flow [2024-06-20 15:27:07,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-20 15:27:07,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-20 15:27:07,635 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 286 flow [2024-06-20 15:27:07,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:07,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:07,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:27:07,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:07,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:07,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2032019753, now seen corresponding path program 1 times [2024-06-20 15:27:07,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:07,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848211589] [2024-06-20 15:27:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:07,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:07,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:07,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848211589] [2024-06-20 15:27:07,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848211589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:07,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:07,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:27:07,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190547600] [2024-06-20 15:27:07,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:07,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:27:07,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:07,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:27:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:27:07,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:07,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:07,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:07,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:07,912 INFO L124 PetriNetUnfolderBase]: 799/1347 cut-off events. [2024-06-20 15:27:07,912 INFO L125 PetriNetUnfolderBase]: For 2272/2279 co-relation queries the response was YES. [2024-06-20 15:27:07,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 1347 events. 799/1347 cut-off events. For 2272/2279 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6920 event pairs, 329 based on Foata normal form. 4/1329 useless extension candidates. Maximal degree in co-relation 4242. Up to 1174 conditions per place. [2024-06-20 15:27:07,921 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 43 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-06-20 15:27:07,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 423 flow [2024-06-20 15:27:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:27:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:27:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-20 15:27:07,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:27:07,923 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 286 flow. Second operand 4 states and 106 transitions. [2024-06-20 15:27:07,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 423 flow [2024-06-20 15:27:07,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 394 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:07,929 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 288 flow [2024-06-20 15:27:07,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-20 15:27:07,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-20 15:27:07,931 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 288 flow [2024-06-20 15:27:07,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:07,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:07,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:27:07,933 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:07,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1425222715, now seen corresponding path program 1 times [2024-06-20 15:27:07,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:07,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406428469] [2024-06-20 15:27:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:07,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:08,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:08,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406428469] [2024-06-20 15:27:08,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406428469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:08,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:08,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:27:08,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693283893] [2024-06-20 15:27:08,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:08,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:27:08,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:27:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:27:08,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:08,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:08,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:08,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:08,265 INFO L124 PetriNetUnfolderBase]: 909/1482 cut-off events. [2024-06-20 15:27:08,265 INFO L125 PetriNetUnfolderBase]: For 2763/2769 co-relation queries the response was YES. [2024-06-20 15:27:08,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 1482 events. 909/1482 cut-off events. For 2763/2769 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7340 event pairs, 335 based on Foata normal form. 3/1481 useless extension candidates. Maximal degree in co-relation 4759. Up to 1301 conditions per place. [2024-06-20 15:27:08,273 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-20 15:27:08,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 547 flow [2024-06-20 15:27:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:27:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:27:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-20 15:27:08,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-20 15:27:08,275 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 288 flow. Second operand 5 states and 133 transitions. [2024-06-20 15:27:08,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 547 flow [2024-06-20 15:27:08,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 83 transitions, 537 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-20 15:27:08,280 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 374 flow [2024-06-20 15:27:08,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-20 15:27:08,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-20 15:27:08,283 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 374 flow [2024-06-20 15:27:08,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:08,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:08,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:27:08,284 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:08,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2119167325, now seen corresponding path program 2 times [2024-06-20 15:27:08,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:08,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757463275] [2024-06-20 15:27:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:08,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:08,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:08,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757463275] [2024-06-20 15:27:08,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757463275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:08,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:08,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:27:08,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206259013] [2024-06-20 15:27:08,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:08,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:27:08,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:08,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:27:08,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:27:08,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:08,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 374 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:08,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:08,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:08,580 INFO L124 PetriNetUnfolderBase]: 904/1463 cut-off events. [2024-06-20 15:27:08,580 INFO L125 PetriNetUnfolderBase]: For 4142/4142 co-relation queries the response was YES. [2024-06-20 15:27:08,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5266 conditions, 1463 events. 904/1463 cut-off events. For 4142/4142 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7208 event pairs, 354 based on Foata normal form. 2/1456 useless extension candidates. Maximal degree in co-relation 5239. Up to 1298 conditions per place. [2024-06-20 15:27:08,589 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-20 15:27:08,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 82 transitions, 608 flow [2024-06-20 15:27:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:27:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:27:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:27:08,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-20 15:27:08,590 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 374 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:27:08,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 82 transitions, 608 flow [2024-06-20 15:27:08,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 588 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-20 15:27:08,595 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 422 flow [2024-06-20 15:27:08,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-20 15:27:08,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-20 15:27:08,596 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 422 flow [2024-06-20 15:27:08,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:08,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:08,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:27:08,596 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:08,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:08,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1904931882, now seen corresponding path program 1 times [2024-06-20 15:27:08,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:08,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008527291] [2024-06-20 15:27:08,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:08,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:08,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:08,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008527291] [2024-06-20 15:27:08,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008527291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:08,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:08,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:27:08,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130329380] [2024-06-20 15:27:08,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:08,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:27:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:27:08,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:27:08,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:08,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:08,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:08,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:08,902 INFO L124 PetriNetUnfolderBase]: 915/1499 cut-off events. [2024-06-20 15:27:08,903 INFO L125 PetriNetUnfolderBase]: For 5145/5151 co-relation queries the response was YES. [2024-06-20 15:27:08,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 1499 events. 915/1499 cut-off events. For 5145/5151 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7483 event pairs, 342 based on Foata normal form. 3/1498 useless extension candidates. Maximal degree in co-relation 5611. Up to 1310 conditions per place. [2024-06-20 15:27:08,913 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 59 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-20 15:27:08,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 683 flow [2024-06-20 15:27:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:27:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:27:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-20 15:27:08,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-20 15:27:08,914 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 422 flow. Second operand 5 states and 133 transitions. [2024-06-20 15:27:08,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 683 flow [2024-06-20 15:27:08,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 653 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:08,920 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 466 flow [2024-06-20 15:27:08,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=466, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-20 15:27:08,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-20 15:27:08,921 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 466 flow [2024-06-20 15:27:08,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:08,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:08,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:27:08,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:08,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1269945300, now seen corresponding path program 2 times [2024-06-20 15:27:08,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:08,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902322379] [2024-06-20 15:27:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:08,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:09,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:09,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902322379] [2024-06-20 15:27:09,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902322379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:09,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:09,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:27:09,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072066626] [2024-06-20 15:27:09,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:09,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:27:09,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:27:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:27:09,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:09,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 466 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:09,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:09,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:09,211 INFO L124 PetriNetUnfolderBase]: 910/1488 cut-off events. [2024-06-20 15:27:09,211 INFO L125 PetriNetUnfolderBase]: For 6269/6275 co-relation queries the response was YES. [2024-06-20 15:27:09,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5734 conditions, 1488 events. 910/1488 cut-off events. For 6269/6275 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7397 event pairs, 353 based on Foata normal form. 6/1487 useless extension candidates. Maximal degree in co-relation 5703. Up to 1305 conditions per place. [2024-06-20 15:27:09,221 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 55 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-06-20 15:27:09,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 664 flow [2024-06-20 15:27:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:27:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:27:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:27:09,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-20 15:27:09,222 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 466 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:27:09,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 664 flow [2024-06-20 15:27:09,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 84 transitions, 637 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:09,229 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 497 flow [2024-06-20 15:27:09,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=497, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-20 15:27:09,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-20 15:27:09,230 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 497 flow [2024-06-20 15:27:09,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:09,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:09,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:27:09,230 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:09,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:09,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1269955220, now seen corresponding path program 1 times [2024-06-20 15:27:09,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:09,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123010955] [2024-06-20 15:27:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:09,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:09,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:09,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123010955] [2024-06-20 15:27:09,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123010955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:09,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:09,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:27:09,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823567220] [2024-06-20 15:27:09,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:09,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:27:09,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:27:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:27:09,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:09,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 497 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:09,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:09,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:09,550 INFO L124 PetriNetUnfolderBase]: 810/1377 cut-off events. [2024-06-20 15:27:09,551 INFO L125 PetriNetUnfolderBase]: For 7364/7370 co-relation queries the response was YES. [2024-06-20 15:27:09,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5446 conditions, 1377 events. 810/1377 cut-off events. For 7364/7370 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7055 event pairs, 291 based on Foata normal form. 8/1370 useless extension candidates. Maximal degree in co-relation 5414. Up to 1169 conditions per place. [2024-06-20 15:27:09,561 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 63 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-06-20 15:27:09,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 697 flow [2024-06-20 15:27:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:27:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:27:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:27:09,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-20 15:27:09,562 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 497 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:27:09,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 697 flow [2024-06-20 15:27:09,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 669 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:09,570 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 514 flow [2024-06-20 15:27:09,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=514, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-06-20 15:27:09,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-20 15:27:09,571 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 514 flow [2024-06-20 15:27:09,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:09,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:09,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:27:09,571 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:09,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2098789456, now seen corresponding path program 1 times [2024-06-20 15:27:09,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:09,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183408287] [2024-06-20 15:27:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:09,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:09,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:09,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183408287] [2024-06-20 15:27:09,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183408287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:09,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:09,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:09,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443077852] [2024-06-20 15:27:09,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:09,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:09,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:09,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:09,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:09,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:09,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 514 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:09,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:09,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:09,911 INFO L124 PetriNetUnfolderBase]: 942/1551 cut-off events. [2024-06-20 15:27:09,911 INFO L125 PetriNetUnfolderBase]: For 8691/8691 co-relation queries the response was YES. [2024-06-20 15:27:09,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6274 conditions, 1551 events. 942/1551 cut-off events. For 8691/8691 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7842 event pairs, 268 based on Foata normal form. 3/1552 useless extension candidates. Maximal degree in co-relation 6240. Up to 1354 conditions per place. [2024-06-20 15:27:09,926 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 81 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2024-06-20 15:27:09,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 896 flow [2024-06-20 15:27:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:27:09,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-20 15:27:09,927 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 514 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:27:09,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 896 flow [2024-06-20 15:27:09,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 869 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:09,967 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 607 flow [2024-06-20 15:27:09,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=607, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-06-20 15:27:09,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-20 15:27:09,967 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 607 flow [2024-06-20 15:27:09,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:09,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:09,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:27:09,968 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:09,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:09,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1107657944, now seen corresponding path program 2 times [2024-06-20 15:27:09,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:09,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368901270] [2024-06-20 15:27:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:09,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:10,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:10,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368901270] [2024-06-20 15:27:10,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368901270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:10,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:10,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:10,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823401714] [2024-06-20 15:27:10,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:10,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:10,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:10,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:10,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:10,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:10,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:10,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:10,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:10,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:10,306 INFO L124 PetriNetUnfolderBase]: 953/1582 cut-off events. [2024-06-20 15:27:10,306 INFO L125 PetriNetUnfolderBase]: For 10898/10904 co-relation queries the response was YES. [2024-06-20 15:27:10,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6967 conditions, 1582 events. 953/1582 cut-off events. For 10898/10904 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8020 event pairs, 303 based on Foata normal form. 3/1581 useless extension candidates. Maximal degree in co-relation 6931. Up to 1283 conditions per place. [2024-06-20 15:27:10,317 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 32 changer transitions 0/116 dead transitions. [2024-06-20 15:27:10,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 1043 flow [2024-06-20 15:27:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:27:10,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-20 15:27:10,318 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 607 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:27:10,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 1043 flow [2024-06-20 15:27:10,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 116 transitions, 969 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:27:10,330 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 760 flow [2024-06-20 15:27:10,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=760, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2024-06-20 15:27:10,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-20 15:27:10,331 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 760 flow [2024-06-20 15:27:10,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:10,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:10,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:10,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:27:10,331 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:10,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:10,331 INFO L85 PathProgramCache]: Analyzing trace with hash 705318268, now seen corresponding path program 3 times [2024-06-20 15:27:10,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:10,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982444677] [2024-06-20 15:27:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:10,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:10,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:10,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982444677] [2024-06-20 15:27:10,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982444677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:10,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:10,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:10,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209260571] [2024-06-20 15:27:10,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:10,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:10,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:10,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:10,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:10,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:10,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 760 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:10,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:10,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:10,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:10,642 INFO L124 PetriNetUnfolderBase]: 948/1553 cut-off events. [2024-06-20 15:27:10,642 INFO L125 PetriNetUnfolderBase]: For 13392/13392 co-relation queries the response was YES. [2024-06-20 15:27:10,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7371 conditions, 1553 events. 948/1553 cut-off events. For 13392/13392 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7817 event pairs, 329 based on Foata normal form. 2/1539 useless extension candidates. Maximal degree in co-relation 7332. Up to 1280 conditions per place. [2024-06-20 15:27:10,653 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-20 15:27:10,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 1110 flow [2024-06-20 15:27:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:27:10,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:27:10,655 INFO L175 Difference]: Start difference. First operand has 85 places, 91 transitions, 760 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:27:10,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 1110 flow [2024-06-20 15:27:10,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 115 transitions, 1074 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-20 15:27:10,670 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 842 flow [2024-06-20 15:27:10,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=842, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2024-06-20 15:27:10,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-20 15:27:10,671 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 842 flow [2024-06-20 15:27:10,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:10,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:10,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:10,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:27:10,672 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:10,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1882266731, now seen corresponding path program 1 times [2024-06-20 15:27:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:10,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703432647] [2024-06-20 15:27:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:10,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:10,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703432647] [2024-06-20 15:27:10,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703432647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:10,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:10,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:10,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298759215] [2024-06-20 15:27:10,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:10,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 15:27:10,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 842 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:10,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:10,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 15:27:10,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:11,075 INFO L124 PetriNetUnfolderBase]: 1082/1797 cut-off events. [2024-06-20 15:27:11,076 INFO L125 PetriNetUnfolderBase]: For 17197/17203 co-relation queries the response was YES. [2024-06-20 15:27:11,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8954 conditions, 1797 events. 1082/1797 cut-off events. For 17197/17203 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9317 event pairs, 305 based on Foata normal form. 5/1798 useless extension candidates. Maximal degree in co-relation 8912. Up to 1374 conditions per place. [2024-06-20 15:27:11,090 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 68 changer transitions 0/161 dead transitions. [2024-06-20 15:27:11,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 161 transitions, 1780 flow [2024-06-20 15:27:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:27:11,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-20 15:27:11,091 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 842 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:27:11,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 161 transitions, 1780 flow [2024-06-20 15:27:11,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 161 transitions, 1652 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:11,114 INFO L231 Difference]: Finished difference. Result has 95 places, 134 transitions, 1408 flow [2024-06-20 15:27:11,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1408, PETRI_PLACES=95, PETRI_TRANSITIONS=134} [2024-06-20 15:27:11,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-20 15:27:11,115 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 134 transitions, 1408 flow [2024-06-20 15:27:11,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:11,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:11,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:11,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:27:11,116 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:11,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash 160726859, now seen corresponding path program 2 times [2024-06-20 15:27:11,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:11,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920355723] [2024-06-20 15:27:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:11,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:11,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:11,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920355723] [2024-06-20 15:27:11,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920355723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:11,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:11,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:11,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590237786] [2024-06-20 15:27:11,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:11,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:11,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:11,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:11,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:11,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:11,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 134 transitions, 1408 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:11,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:11,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:11,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:11,530 INFO L124 PetriNetUnfolderBase]: 1071/1780 cut-off events. [2024-06-20 15:27:11,531 INFO L125 PetriNetUnfolderBase]: For 19042/19042 co-relation queries the response was YES. [2024-06-20 15:27:11,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9217 conditions, 1780 events. 1071/1780 cut-off events. For 19042/19042 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9188 event pairs, 297 based on Foata normal form. 4/1782 useless extension candidates. Maximal degree in co-relation 9172. Up to 1505 conditions per place. [2024-06-20 15:27:11,545 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 121 selfloop transitions, 39 changer transitions 0/168 dead transitions. [2024-06-20 15:27:11,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 168 transitions, 1874 flow [2024-06-20 15:27:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:27:11,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:27:11,547 INFO L175 Difference]: Start difference. First operand has 95 places, 134 transitions, 1408 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:27:11,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 168 transitions, 1874 flow [2024-06-20 15:27:11,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 168 transitions, 1789 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:11,571 INFO L231 Difference]: Finished difference. Result has 100 places, 134 transitions, 1422 flow [2024-06-20 15:27:11,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1422, PETRI_PLACES=100, PETRI_TRANSITIONS=134} [2024-06-20 15:27:11,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-20 15:27:11,573 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 134 transitions, 1422 flow [2024-06-20 15:27:11,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:11,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:11,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:11,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:27:11,573 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:11,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:11,574 INFO L85 PathProgramCache]: Analyzing trace with hash 166440779, now seen corresponding path program 3 times [2024-06-20 15:27:11,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:11,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279879944] [2024-06-20 15:27:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:11,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:11,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:11,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279879944] [2024-06-20 15:27:11,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279879944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:11,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:11,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:11,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215757580] [2024-06-20 15:27:11,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:11,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:11,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:11,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:11,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:11,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:11,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 134 transitions, 1422 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:11,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:11,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:11,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:11,946 INFO L124 PetriNetUnfolderBase]: 1122/1870 cut-off events. [2024-06-20 15:27:11,946 INFO L125 PetriNetUnfolderBase]: For 22398/22406 co-relation queries the response was YES. [2024-06-20 15:27:11,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9829 conditions, 1870 events. 1122/1870 cut-off events. For 22398/22406 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9821 event pairs, 312 based on Foata normal form. 4/1870 useless extension candidates. Maximal degree in co-relation 9783. Up to 1418 conditions per place. [2024-06-20 15:27:11,964 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 85 selfloop transitions, 83 changer transitions 0/176 dead transitions. [2024-06-20 15:27:11,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 176 transitions, 2156 flow [2024-06-20 15:27:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:27:11,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:27:11,965 INFO L175 Difference]: Start difference. First operand has 100 places, 134 transitions, 1422 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:27:11,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 176 transitions, 2156 flow [2024-06-20 15:27:11,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 176 transitions, 2078 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:11,995 INFO L231 Difference]: Finished difference. Result has 100 places, 149 transitions, 1719 flow [2024-06-20 15:27:11,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1719, PETRI_PLACES=100, PETRI_TRANSITIONS=149} [2024-06-20 15:27:11,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-20 15:27:11,996 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 149 transitions, 1719 flow [2024-06-20 15:27:11,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:11,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:11,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:11,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:27:11,997 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:11,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:11,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1236250279, now seen corresponding path program 4 times [2024-06-20 15:27:11,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:11,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420894607] [2024-06-20 15:27:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:11,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:12,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:12,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420894607] [2024-06-20 15:27:12,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420894607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:12,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:12,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:12,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830835226] [2024-06-20 15:27:12,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:12,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:12,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:12,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:12,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:12,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:12,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 149 transitions, 1719 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:12,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:12,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:12,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:12,415 INFO L124 PetriNetUnfolderBase]: 1147/1909 cut-off events. [2024-06-20 15:27:12,415 INFO L125 PetriNetUnfolderBase]: For 25485/25499 co-relation queries the response was YES. [2024-06-20 15:27:12,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10408 conditions, 1909 events. 1147/1909 cut-off events. For 25485/25499 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10020 event pairs, 315 based on Foata normal form. 4/1907 useless extension candidates. Maximal degree in co-relation 10361. Up to 1446 conditions per place. [2024-06-20 15:27:12,429 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 88 selfloop transitions, 90 changer transitions 0/186 dead transitions. [2024-06-20 15:27:12,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 186 transitions, 2361 flow [2024-06-20 15:27:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:27:12,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:27:12,430 INFO L175 Difference]: Start difference. First operand has 100 places, 149 transitions, 1719 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:27:12,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 186 transitions, 2361 flow [2024-06-20 15:27:12,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 186 transitions, 2226 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:12,459 INFO L231 Difference]: Finished difference. Result has 105 places, 158 transitions, 1911 flow [2024-06-20 15:27:12,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1911, PETRI_PLACES=105, PETRI_TRANSITIONS=158} [2024-06-20 15:27:12,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-20 15:27:12,460 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 158 transitions, 1911 flow [2024-06-20 15:27:12,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:12,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:12,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:12,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:27:12,460 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:12,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash 166448715, now seen corresponding path program 1 times [2024-06-20 15:27:12,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:12,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503875120] [2024-06-20 15:27:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:12,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:12,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:12,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503875120] [2024-06-20 15:27:12,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503875120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:12,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:12,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:12,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707424101] [2024-06-20 15:27:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:12,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:12,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:12,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 158 transitions, 1911 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:12,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:12,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:12,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:12,851 INFO L124 PetriNetUnfolderBase]: 1164/1940 cut-off events. [2024-06-20 15:27:12,851 INFO L125 PetriNetUnfolderBase]: For 28985/28991 co-relation queries the response was YES. [2024-06-20 15:27:12,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10657 conditions, 1940 events. 1164/1940 cut-off events. For 28985/28991 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10257 event pairs, 315 based on Foata normal form. 5/1941 useless extension candidates. Maximal degree in co-relation 10609. Up to 1616 conditions per place. [2024-06-20 15:27:12,869 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 137 selfloop transitions, 40 changer transitions 0/185 dead transitions. [2024-06-20 15:27:12,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 185 transitions, 2369 flow [2024-06-20 15:27:12,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:12,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:27:12,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:27:12,871 INFO L175 Difference]: Start difference. First operand has 105 places, 158 transitions, 1911 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:27:12,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 185 transitions, 2369 flow [2024-06-20 15:27:12,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 185 transitions, 2147 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:12,904 INFO L231 Difference]: Finished difference. Result has 106 places, 160 transitions, 1802 flow [2024-06-20 15:27:12,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1802, PETRI_PLACES=106, PETRI_TRANSITIONS=160} [2024-06-20 15:27:12,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-20 15:27:12,905 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 160 transitions, 1802 flow [2024-06-20 15:27:12,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:12,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:12,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:12,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:27:12,906 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:12,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash 788836017, now seen corresponding path program 5 times [2024-06-20 15:27:12,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:12,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254228473] [2024-06-20 15:27:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:12,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:13,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:13,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254228473] [2024-06-20 15:27:13,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254228473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:13,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:13,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:13,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112094963] [2024-06-20 15:27:13,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:13,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:13,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:13,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:13,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:13,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:13,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 160 transitions, 1802 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:13,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:13,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:13,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:13,270 INFO L124 PetriNetUnfolderBase]: 1156/1922 cut-off events. [2024-06-20 15:27:13,271 INFO L125 PetriNetUnfolderBase]: For 29884/29890 co-relation queries the response was YES. [2024-06-20 15:27:13,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10539 conditions, 1922 events. 1156/1922 cut-off events. For 29884/29890 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10119 event pairs, 331 based on Foata normal form. 7/1910 useless extension candidates. Maximal degree in co-relation 10490. Up to 1465 conditions per place. [2024-06-20 15:27:13,289 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 83 selfloop transitions, 93 changer transitions 0/184 dead transitions. [2024-06-20 15:27:13,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 184 transitions, 2328 flow [2024-06-20 15:27:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:27:13,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:27:13,291 INFO L175 Difference]: Start difference. First operand has 106 places, 160 transitions, 1802 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:27:13,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 184 transitions, 2328 flow [2024-06-20 15:27:13,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 184 transitions, 2229 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:27:13,330 INFO L231 Difference]: Finished difference. Result has 108 places, 162 transitions, 1931 flow [2024-06-20 15:27:13,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1931, PETRI_PLACES=108, PETRI_TRANSITIONS=162} [2024-06-20 15:27:13,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-20 15:27:13,331 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 162 transitions, 1931 flow [2024-06-20 15:27:13,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:13,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:13,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:13,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:27:13,332 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:13,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2105995705, now seen corresponding path program 6 times [2024-06-20 15:27:13,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:13,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747639143] [2024-06-20 15:27:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:13,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:13,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:13,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747639143] [2024-06-20 15:27:13,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747639143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:13,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:13,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:13,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430571868] [2024-06-20 15:27:13,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:13,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:13,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:13,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:13,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:13,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:13,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 162 transitions, 1931 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:13,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:13,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:13,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:13,755 INFO L124 PetriNetUnfolderBase]: 1148/1898 cut-off events. [2024-06-20 15:27:13,755 INFO L125 PetriNetUnfolderBase]: For 31706/31706 co-relation queries the response was YES. [2024-06-20 15:27:13,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10661 conditions, 1898 events. 1148/1898 cut-off events. For 31706/31706 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9869 event pairs, 335 based on Foata normal form. 3/1870 useless extension candidates. Maximal degree in co-relation 10611. Up to 1457 conditions per place. [2024-06-20 15:27:13,770 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 96 changer transitions 0/186 dead transitions. [2024-06-20 15:27:13,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 2369 flow [2024-06-20 15:27:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:27:13,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:27:13,772 INFO L175 Difference]: Start difference. First operand has 108 places, 162 transitions, 1931 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:27:13,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 2369 flow [2024-06-20 15:27:13,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 186 transitions, 2191 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:13,808 INFO L231 Difference]: Finished difference. Result has 112 places, 162 transitions, 1960 flow [2024-06-20 15:27:13,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1960, PETRI_PLACES=112, PETRI_TRANSITIONS=162} [2024-06-20 15:27:13,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-20 15:27:13,809 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 162 transitions, 1960 flow [2024-06-20 15:27:13,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:13,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:13,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:13,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:27:13,810 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:13,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1973643429, now seen corresponding path program 2 times [2024-06-20 15:27:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:13,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006596450] [2024-06-20 15:27:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:13,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:13,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006596450] [2024-06-20 15:27:13,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006596450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:13,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:13,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:13,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163537740] [2024-06-20 15:27:13,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:13,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:13,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:13,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 162 transitions, 1960 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:13,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:13,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:13,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:14,216 INFO L124 PetriNetUnfolderBase]: 1165/1947 cut-off events. [2024-06-20 15:27:14,216 INFO L125 PetriNetUnfolderBase]: For 35354/35360 co-relation queries the response was YES. [2024-06-20 15:27:14,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10930 conditions, 1947 events. 1165/1947 cut-off events. For 35354/35360 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10320 event pairs, 329 based on Foata normal form. 8/1945 useless extension candidates. Maximal degree in co-relation 10878. Up to 1626 conditions per place. [2024-06-20 15:27:14,230 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 140 selfloop transitions, 39 changer transitions 0/187 dead transitions. [2024-06-20 15:27:14,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 187 transitions, 2422 flow [2024-06-20 15:27:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:27:14,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-20 15:27:14,231 INFO L175 Difference]: Start difference. First operand has 112 places, 162 transitions, 1960 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:27:14,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 187 transitions, 2422 flow [2024-06-20 15:27:14,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 187 transitions, 2200 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:14,268 INFO L231 Difference]: Finished difference. Result has 113 places, 164 transitions, 1852 flow [2024-06-20 15:27:14,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1852, PETRI_PLACES=113, PETRI_TRANSITIONS=164} [2024-06-20 15:27:14,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-20 15:27:14,268 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 164 transitions, 1852 flow [2024-06-20 15:27:14,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:14,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:14,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:14,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:27:14,269 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:14,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:14,269 INFO L85 PathProgramCache]: Analyzing trace with hash 275636605, now seen corresponding path program 3 times [2024-06-20 15:27:14,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:14,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127878741] [2024-06-20 15:27:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:14,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:14,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:14,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127878741] [2024-06-20 15:27:14,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127878741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:14,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:14,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:14,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787111992] [2024-06-20 15:27:14,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:14,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:14,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:14,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:14,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:14,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 164 transitions, 1852 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:14,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:14,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:14,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:14,621 INFO L124 PetriNetUnfolderBase]: 1157/1931 cut-off events. [2024-06-20 15:27:14,621 INFO L125 PetriNetUnfolderBase]: For 36558/36564 co-relation queries the response was YES. [2024-06-20 15:27:14,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10797 conditions, 1931 events. 1157/1931 cut-off events. For 36558/36564 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10259 event pairs, 298 based on Foata normal form. 8/1929 useless extension candidates. Maximal degree in co-relation 10744. Up to 1547 conditions per place. [2024-06-20 15:27:14,638 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 138 selfloop transitions, 44 changer transitions 0/190 dead transitions. [2024-06-20 15:27:14,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 190 transitions, 2324 flow [2024-06-20 15:27:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:27:14,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:27:14,640 INFO L175 Difference]: Start difference. First operand has 113 places, 164 transitions, 1852 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:27:14,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 190 transitions, 2324 flow [2024-06-20 15:27:14,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 190 transitions, 2230 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:27:14,677 INFO L231 Difference]: Finished difference. Result has 115 places, 166 transitions, 1885 flow [2024-06-20 15:27:14,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1885, PETRI_PLACES=115, PETRI_TRANSITIONS=166} [2024-06-20 15:27:14,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-20 15:27:14,678 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 166 transitions, 1885 flow [2024-06-20 15:27:14,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:14,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:14,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:14,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:27:14,679 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:14,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash 181145846, now seen corresponding path program 1 times [2024-06-20 15:27:14,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:14,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135006892] [2024-06-20 15:27:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:14,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:14,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:14,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135006892] [2024-06-20 15:27:14,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135006892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:14,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:14,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:27:14,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481095533] [2024-06-20 15:27:14,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:14,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:27:14,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:14,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:27:14,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:27:14,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:14,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 166 transitions, 1885 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:14,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:14,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:14,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:15,027 INFO L124 PetriNetUnfolderBase]: 1087/1857 cut-off events. [2024-06-20 15:27:15,028 INFO L125 PetriNetUnfolderBase]: For 38269/38280 co-relation queries the response was YES. [2024-06-20 15:27:15,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10686 conditions, 1857 events. 1087/1857 cut-off events. For 38269/38280 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10044 event pairs, 293 based on Foata normal form. 2/1851 useless extension candidates. Maximal degree in co-relation 10632. Up to 1554 conditions per place. [2024-06-20 15:27:15,048 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 152 selfloop transitions, 22 changer transitions 0/189 dead transitions. [2024-06-20 15:27:15,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 189 transitions, 2435 flow [2024-06-20 15:27:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:27:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:27:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:27:15,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-20 15:27:15,049 INFO L175 Difference]: Start difference. First operand has 115 places, 166 transitions, 1885 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:27:15,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 189 transitions, 2435 flow [2024-06-20 15:27:15,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 189 transitions, 2326 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:27:15,097 INFO L231 Difference]: Finished difference. Result has 117 places, 175 transitions, 1924 flow [2024-06-20 15:27:15,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1924, PETRI_PLACES=117, PETRI_TRANSITIONS=175} [2024-06-20 15:27:15,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-20 15:27:15,097 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 175 transitions, 1924 flow [2024-06-20 15:27:15,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:15,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:15,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:15,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:27:15,098 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:15,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:15,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1115101976, now seen corresponding path program 2 times [2024-06-20 15:27:15,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:15,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737941549] [2024-06-20 15:27:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:15,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:15,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:15,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737941549] [2024-06-20 15:27:15,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737941549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:15,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:15,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:27:15,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677631297] [2024-06-20 15:27:15,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:15,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:27:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:15,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:27:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:27:15,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:15,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 175 transitions, 1924 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:15,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:15,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:15,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:15,423 INFO L124 PetriNetUnfolderBase]: 1094/1874 cut-off events. [2024-06-20 15:27:15,423 INFO L125 PetriNetUnfolderBase]: For 39790/39800 co-relation queries the response was YES. [2024-06-20 15:27:15,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10952 conditions, 1874 events. 1094/1874 cut-off events. For 39790/39800 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10219 event pairs, 289 based on Foata normal form. 2/1871 useless extension candidates. Maximal degree in co-relation 10896. Up to 1575 conditions per place. [2024-06-20 15:27:15,440 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 159 selfloop transitions, 20 changer transitions 0/194 dead transitions. [2024-06-20 15:27:15,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 194 transitions, 2407 flow [2024-06-20 15:27:15,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:27:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:27:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 15:27:15,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-20 15:27:15,442 INFO L175 Difference]: Start difference. First operand has 117 places, 175 transitions, 1924 flow. Second operand 5 states and 131 transitions. [2024-06-20 15:27:15,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 194 transitions, 2407 flow [2024-06-20 15:27:15,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 194 transitions, 2357 flow, removed 25 selfloop flow, removed 0 redundant places. [2024-06-20 15:27:15,515 INFO L231 Difference]: Finished difference. Result has 123 places, 178 transitions, 1970 flow [2024-06-20 15:27:15,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1970, PETRI_PLACES=123, PETRI_TRANSITIONS=178} [2024-06-20 15:27:15,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-20 15:27:15,516 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 178 transitions, 1970 flow [2024-06-20 15:27:15,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:15,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:15,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:15,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:27:15,517 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:15,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash -687633201, now seen corresponding path program 1 times [2024-06-20 15:27:15,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:15,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792971275] [2024-06-20 15:27:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:15,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:15,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:15,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792971275] [2024-06-20 15:27:15,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792971275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:15,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:15,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:15,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105514322] [2024-06-20 15:27:15,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:15,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:15,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:15,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:15,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:15,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 178 transitions, 1970 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:15,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:15,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:15,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:16,014 INFO L124 PetriNetUnfolderBase]: 1380/2277 cut-off events. [2024-06-20 15:27:16,014 INFO L125 PetriNetUnfolderBase]: For 53676/53676 co-relation queries the response was YES. [2024-06-20 15:27:16,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13609 conditions, 2277 events. 1380/2277 cut-off events. For 53676/53676 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12347 event pairs, 230 based on Foata normal form. 6/2281 useless extension candidates. Maximal degree in co-relation 13549. Up to 1644 conditions per place. [2024-06-20 15:27:16,034 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 43 changer transitions 0/228 dead transitions. [2024-06-20 15:27:16,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 228 transitions, 2740 flow [2024-06-20 15:27:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:27:16,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-20 15:27:16,036 INFO L175 Difference]: Start difference. First operand has 123 places, 178 transitions, 1970 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:27:16,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 228 transitions, 2740 flow [2024-06-20 15:27:16,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 228 transitions, 2708 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:16,099 INFO L231 Difference]: Finished difference. Result has 129 places, 185 transitions, 2137 flow [2024-06-20 15:27:16,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2137, PETRI_PLACES=129, PETRI_TRANSITIONS=185} [2024-06-20 15:27:16,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-20 15:27:16,100 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 185 transitions, 2137 flow [2024-06-20 15:27:16,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:16,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:16,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:16,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:27:16,101 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:16,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:16,101 INFO L85 PathProgramCache]: Analyzing trace with hash 47216027, now seen corresponding path program 2 times [2024-06-20 15:27:16,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:16,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277857435] [2024-06-20 15:27:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:16,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:16,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:16,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277857435] [2024-06-20 15:27:16,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277857435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:16,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:16,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:16,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333947758] [2024-06-20 15:27:16,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:16,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:16,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:16,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:16,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:16,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 185 transitions, 2137 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:16,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:16,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:16,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:16,606 INFO L124 PetriNetUnfolderBase]: 1367/2266 cut-off events. [2024-06-20 15:27:16,606 INFO L125 PetriNetUnfolderBase]: For 56307/56307 co-relation queries the response was YES. [2024-06-20 15:27:16,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13971 conditions, 2266 events. 1367/2266 cut-off events. For 56307/56307 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12339 event pairs, 311 based on Foata normal form. 6/2270 useless extension candidates. Maximal degree in co-relation 13909. Up to 1935 conditions per place. [2024-06-20 15:27:16,625 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 42 changer transitions 0/225 dead transitions. [2024-06-20 15:27:16,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 225 transitions, 2747 flow [2024-06-20 15:27:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:27:16,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:27:16,627 INFO L175 Difference]: Start difference. First operand has 129 places, 185 transitions, 2137 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:27:16,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 225 transitions, 2747 flow [2024-06-20 15:27:16,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 225 transitions, 2660 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:27:16,702 INFO L231 Difference]: Finished difference. Result has 133 places, 188 transitions, 2200 flow [2024-06-20 15:27:16,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2200, PETRI_PLACES=133, PETRI_TRANSITIONS=188} [2024-06-20 15:27:16,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-20 15:27:16,703 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 188 transitions, 2200 flow [2024-06-20 15:27:16,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:16,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:16,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:16,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:27:16,704 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:16,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash 330942841, now seen corresponding path program 3 times [2024-06-20 15:27:16,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:16,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709541792] [2024-06-20 15:27:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:16,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:16,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709541792] [2024-06-20 15:27:16,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709541792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:16,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:16,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:16,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199058320] [2024-06-20 15:27:16,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:16,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:16,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:16,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:16,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:16,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:16,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 188 transitions, 2200 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:16,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:16,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:16,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:17,165 INFO L124 PetriNetUnfolderBase]: 1384/2288 cut-off events. [2024-06-20 15:27:17,166 INFO L125 PetriNetUnfolderBase]: For 61058/61074 co-relation queries the response was YES. [2024-06-20 15:27:17,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14363 conditions, 2288 events. 1384/2288 cut-off events. For 61058/61074 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12473 event pairs, 325 based on Foata normal form. 5/2287 useless extension candidates. Maximal degree in co-relation 14299. Up to 1808 conditions per place. [2024-06-20 15:27:17,182 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 94 changer transitions 0/217 dead transitions. [2024-06-20 15:27:17,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 217 transitions, 2746 flow [2024-06-20 15:27:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:27:17,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:27:17,183 INFO L175 Difference]: Start difference. First operand has 133 places, 188 transitions, 2200 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:27:17,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 217 transitions, 2746 flow [2024-06-20 15:27:17,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 217 transitions, 2634 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:17,285 INFO L231 Difference]: Finished difference. Result has 134 places, 190 transitions, 2330 flow [2024-06-20 15:27:17,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2330, PETRI_PLACES=134, PETRI_TRANSITIONS=190} [2024-06-20 15:27:17,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-20 15:27:17,285 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 190 transitions, 2330 flow [2024-06-20 15:27:17,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:17,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:17,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:17,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:27:17,286 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:17,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash -971136043, now seen corresponding path program 1 times [2024-06-20 15:27:17,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:17,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77710888] [2024-06-20 15:27:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:17,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:17,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:17,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77710888] [2024-06-20 15:27:17,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77710888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:17,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:17,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:17,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212643368] [2024-06-20 15:27:17,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:17,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:17,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:17,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:17,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:17,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:17,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 190 transitions, 2330 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:17,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:17,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:17,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:17,681 INFO L124 PetriNetUnfolderBase]: 1324/2247 cut-off events. [2024-06-20 15:27:17,681 INFO L125 PetriNetUnfolderBase]: For 63714/63716 co-relation queries the response was YES. [2024-06-20 15:27:17,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14305 conditions, 2247 events. 1324/2247 cut-off events. For 63714/63716 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12529 event pairs, 308 based on Foata normal form. 2/2247 useless extension candidates. Maximal degree in co-relation 14240. Up to 1892 conditions per place. [2024-06-20 15:27:17,700 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 165 selfloop transitions, 30 changer transitions 0/218 dead transitions. [2024-06-20 15:27:17,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 218 transitions, 2911 flow [2024-06-20 15:27:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:27:17,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:27:17,702 INFO L175 Difference]: Start difference. First operand has 134 places, 190 transitions, 2330 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:27:17,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 218 transitions, 2911 flow [2024-06-20 15:27:17,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 218 transitions, 2689 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:17,790 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 2279 flow [2024-06-20 15:27:17,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2279, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2024-06-20 15:27:17,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-20 15:27:17,791 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 2279 flow [2024-06-20 15:27:17,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:17,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:17,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:17,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:27:17,792 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:17,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash -882676665, now seen corresponding path program 4 times [2024-06-20 15:27:17,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:17,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41077564] [2024-06-20 15:27:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:17,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:17,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:17,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41077564] [2024-06-20 15:27:17,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41077564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:17,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:17,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:17,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452008448] [2024-06-20 15:27:17,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:17,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:17,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:17,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:17,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 2279 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:17,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:17,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:17,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:18,212 INFO L124 PetriNetUnfolderBase]: 1396/2294 cut-off events. [2024-06-20 15:27:18,212 INFO L125 PetriNetUnfolderBase]: For 66482/66482 co-relation queries the response was YES. [2024-06-20 15:27:18,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14559 conditions, 2294 events. 1396/2294 cut-off events. For 66482/66482 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12396 event pairs, 344 based on Foata normal form. 4/2261 useless extension candidates. Maximal degree in co-relation 14492. Up to 1824 conditions per place. [2024-06-20 15:27:18,230 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 122 selfloop transitions, 98 changer transitions 0/228 dead transitions. [2024-06-20 15:27:18,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 228 transitions, 2847 flow [2024-06-20 15:27:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:27:18,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:27:18,231 INFO L175 Difference]: Start difference. First operand has 136 places, 201 transitions, 2279 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:27:18,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 228 transitions, 2847 flow [2024-06-20 15:27:18,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 228 transitions, 2817 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-20 15:27:18,338 INFO L231 Difference]: Finished difference. Result has 142 places, 203 transitions, 2503 flow [2024-06-20 15:27:18,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2503, PETRI_PLACES=142, PETRI_TRANSITIONS=203} [2024-06-20 15:27:18,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-20 15:27:18,339 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 203 transitions, 2503 flow [2024-06-20 15:27:18,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:18,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:18,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:18,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:27:18,340 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:18,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash 574773985, now seen corresponding path program 2 times [2024-06-20 15:27:18,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:18,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085526830] [2024-06-20 15:27:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:18,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:18,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:18,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085526830] [2024-06-20 15:27:18,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085526830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:18,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:18,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:18,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366229749] [2024-06-20 15:27:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:18,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:18,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:18,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:18,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 203 transitions, 2503 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:18,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:18,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:18,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:18,735 INFO L124 PetriNetUnfolderBase]: 1326/2253 cut-off events. [2024-06-20 15:27:18,735 INFO L125 PetriNetUnfolderBase]: For 70339/70341 co-relation queries the response was YES. [2024-06-20 15:27:18,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14698 conditions, 2253 events. 1326/2253 cut-off events. For 70339/70341 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12628 event pairs, 305 based on Foata normal form. 2/2253 useless extension candidates. Maximal degree in co-relation 14629. Up to 1904 conditions per place. [2024-06-20 15:27:18,751 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 172 selfloop transitions, 25 changer transitions 0/220 dead transitions. [2024-06-20 15:27:18,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 220 transitions, 2969 flow [2024-06-20 15:27:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:27:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:27:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-20 15:27:18,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676829268292683 [2024-06-20 15:27:18,753 INFO L175 Difference]: Start difference. First operand has 142 places, 203 transitions, 2503 flow. Second operand 4 states and 111 transitions. [2024-06-20 15:27:18,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 220 transitions, 2969 flow [2024-06-20 15:27:18,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2735 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:18,894 INFO L231 Difference]: Finished difference. Result has 141 places, 206 transitions, 2373 flow [2024-06-20 15:27:18,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2373, PETRI_PLACES=141, PETRI_TRANSITIONS=206} [2024-06-20 15:27:18,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-20 15:27:18,895 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 206 transitions, 2373 flow [2024-06-20 15:27:18,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:18,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:18,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:18,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:27:18,896 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:18,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash 239489415, now seen corresponding path program 3 times [2024-06-20 15:27:18,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:18,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462582348] [2024-06-20 15:27:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:18,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:18,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:18,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462582348] [2024-06-20 15:27:18,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462582348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:18,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:18,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:18,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211344186] [2024-06-20 15:27:18,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:18,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:18,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:19,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:19,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 206 transitions, 2373 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:19,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:19,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:19,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:19,269 INFO L124 PetriNetUnfolderBase]: 1320/2245 cut-off events. [2024-06-20 15:27:19,270 INFO L125 PetriNetUnfolderBase]: For 71335/71337 co-relation queries the response was YES. [2024-06-20 15:27:19,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14389 conditions, 2245 events. 1320/2245 cut-off events. For 71335/71337 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12563 event pairs, 305 based on Foata normal form. 2/2245 useless extension candidates. Maximal degree in co-relation 14319. Up to 1885 conditions per place. [2024-06-20 15:27:19,288 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 167 selfloop transitions, 31 changer transitions 0/221 dead transitions. [2024-06-20 15:27:19,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 221 transitions, 2817 flow [2024-06-20 15:27:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:27:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:27:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 15:27:19,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-20 15:27:19,289 INFO L175 Difference]: Start difference. First operand has 141 places, 206 transitions, 2373 flow. Second operand 5 states and 131 transitions. [2024-06-20 15:27:19,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 221 transitions, 2817 flow [2024-06-20 15:27:19,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 221 transitions, 2775 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:19,401 INFO L231 Difference]: Finished difference. Result has 144 places, 206 transitions, 2405 flow [2024-06-20 15:27:19,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2405, PETRI_PLACES=144, PETRI_TRANSITIONS=206} [2024-06-20 15:27:19,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-20 15:27:19,402 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 206 transitions, 2405 flow [2024-06-20 15:27:19,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:19,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:19,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:19,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:27:19,402 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:19,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1251514325, now seen corresponding path program 1 times [2024-06-20 15:27:19,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:19,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849847951] [2024-06-20 15:27:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:19,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:19,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:19,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849847951] [2024-06-20 15:27:19,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849847951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:19,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:19,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:27:19,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417497965] [2024-06-20 15:27:19,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:19,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:27:19,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:19,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:27:19,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:27:19,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:19,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 206 transitions, 2405 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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) [2024-06-20 15:27:19,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:19,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:19,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:19,774 INFO L124 PetriNetUnfolderBase]: 1294/2221 cut-off events. [2024-06-20 15:27:19,774 INFO L125 PetriNetUnfolderBase]: For 75921/75953 co-relation queries the response was YES. [2024-06-20 15:27:19,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14422 conditions, 2221 events. 1294/2221 cut-off events. For 75921/75953 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12623 event pairs, 303 based on Foata normal form. 16/2227 useless extension candidates. Maximal degree in co-relation 14351. Up to 1870 conditions per place. [2024-06-20 15:27:19,795 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 176 selfloop transitions, 25 changer transitions 0/222 dead transitions. [2024-06-20 15:27:19,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 222 transitions, 2938 flow [2024-06-20 15:27:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:27:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:27:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-20 15:27:19,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-20 15:27:19,796 INFO L175 Difference]: Start difference. First operand has 144 places, 206 transitions, 2405 flow. Second operand 5 states and 128 transitions. [2024-06-20 15:27:19,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 222 transitions, 2938 flow [2024-06-20 15:27:19,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 222 transitions, 2863 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:27:19,902 INFO L231 Difference]: Finished difference. Result has 145 places, 209 transitions, 2419 flow [2024-06-20 15:27:19,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2419, PETRI_PLACES=145, PETRI_TRANSITIONS=209} [2024-06-20 15:27:19,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-20 15:27:19,902 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 209 transitions, 2419 flow [2024-06-20 15:27:19,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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) [2024-06-20 15:27:19,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:19,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:19,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:27:19,903 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:19,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:19,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1364866695, now seen corresponding path program 2 times [2024-06-20 15:27:19,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:19,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587522295] [2024-06-20 15:27:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:19,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:20,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:20,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587522295] [2024-06-20 15:27:20,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587522295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:20,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:20,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:20,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024121747] [2024-06-20 15:27:20,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:20,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:20,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:20,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:20,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:20,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:20,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 209 transitions, 2419 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:20,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:20,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:20,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:20,339 INFO L124 PetriNetUnfolderBase]: 1300/2220 cut-off events. [2024-06-20 15:27:20,339 INFO L125 PetriNetUnfolderBase]: For 75418/75433 co-relation queries the response was YES. [2024-06-20 15:27:20,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14349 conditions, 2220 events. 1300/2220 cut-off events. For 75418/75433 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12528 event pairs, 302 based on Foata normal form. 7/2218 useless extension candidates. Maximal degree in co-relation 14278. Up to 1875 conditions per place. [2024-06-20 15:27:20,356 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 174 selfloop transitions, 28 changer transitions 0/223 dead transitions. [2024-06-20 15:27:20,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 223 transitions, 2925 flow [2024-06-20 15:27:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:20,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:27:20,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 15:27:20,358 INFO L175 Difference]: Start difference. First operand has 145 places, 209 transitions, 2419 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:27:20,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 223 transitions, 2925 flow [2024-06-20 15:27:20,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 223 transitions, 2853 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:20,459 INFO L231 Difference]: Finished difference. Result has 148 places, 209 transitions, 2409 flow [2024-06-20 15:27:20,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2409, PETRI_PLACES=148, PETRI_TRANSITIONS=209} [2024-06-20 15:27:20,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-20 15:27:20,460 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 209 transitions, 2409 flow [2024-06-20 15:27:20,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:20,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:20,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:20,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:27:20,460 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:20,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:20,461 INFO L85 PathProgramCache]: Analyzing trace with hash 208423943, now seen corresponding path program 3 times [2024-06-20 15:27:20,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:20,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194476419] [2024-06-20 15:27:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:20,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:20,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:20,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194476419] [2024-06-20 15:27:20,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194476419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:20,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:20,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:27:20,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751402711] [2024-06-20 15:27:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:20,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:27:20,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:27:20,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:27:20,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:20,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 209 transitions, 2409 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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) [2024-06-20 15:27:20,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:20,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:20,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:20,832 INFO L124 PetriNetUnfolderBase]: 1294/2218 cut-off events. [2024-06-20 15:27:20,832 INFO L125 PetriNetUnfolderBase]: For 77560/77576 co-relation queries the response was YES. [2024-06-20 15:27:20,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14362 conditions, 2218 events. 1294/2218 cut-off events. For 77560/77576 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12526 event pairs, 295 based on Foata normal form. 3/2216 useless extension candidates. Maximal degree in co-relation 14291. Up to 1879 conditions per place. [2024-06-20 15:27:20,852 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 183 selfloop transitions, 20 changer transitions 0/224 dead transitions. [2024-06-20 15:27:20,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 224 transitions, 2861 flow [2024-06-20 15:27:20,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:27:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:27:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 15:27:20,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:27:20,854 INFO L175 Difference]: Start difference. First operand has 148 places, 209 transitions, 2409 flow. Second operand 5 states and 130 transitions. [2024-06-20 15:27:20,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 224 transitions, 2861 flow [2024-06-20 15:27:21,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 224 transitions, 2767 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:21,033 INFO L231 Difference]: Finished difference. Result has 147 places, 209 transitions, 2365 flow [2024-06-20 15:27:21,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2365, PETRI_PLACES=147, PETRI_TRANSITIONS=209} [2024-06-20 15:27:21,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-20 15:27:21,033 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 209 transitions, 2365 flow [2024-06-20 15:27:21,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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) [2024-06-20 15:27:21,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:21,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:21,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:27:21,034 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:21,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-20 15:27:21,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:21,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99702217] [2024-06-20 15:27:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:21,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:21,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:21,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99702217] [2024-06-20 15:27:21,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99702217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:21,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:21,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:21,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692503213] [2024-06-20 15:27:21,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:21,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:21,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:21,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:21,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:21,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 209 transitions, 2365 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:21,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:21,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:21,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:21,480 INFO L124 PetriNetUnfolderBase]: 1305/2231 cut-off events. [2024-06-20 15:27:21,480 INFO L125 PetriNetUnfolderBase]: For 79710/79720 co-relation queries the response was YES. [2024-06-20 15:27:21,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14376 conditions, 2231 events. 1305/2231 cut-off events. For 79710/79720 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12514 event pairs, 318 based on Foata normal form. 2/2228 useless extension candidates. Maximal degree in co-relation 14305. Up to 1925 conditions per place. [2024-06-20 15:27:21,499 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 187 selfloop transitions, 10 changer transitions 0/220 dead transitions. [2024-06-20 15:27:21,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 220 transitions, 2805 flow [2024-06-20 15:27:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:27:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:27:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-20 15:27:21,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-20 15:27:21,500 INFO L175 Difference]: Start difference. First operand has 147 places, 209 transitions, 2365 flow. Second operand 4 states and 103 transitions. [2024-06-20 15:27:21,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 220 transitions, 2805 flow [2024-06-20 15:27:21,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 220 transitions, 2765 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:27:21,636 INFO L231 Difference]: Finished difference. Result has 147 places, 211 transitions, 2374 flow [2024-06-20 15:27:21,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2374, PETRI_PLACES=147, PETRI_TRANSITIONS=211} [2024-06-20 15:27:21,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-20 15:27:21,636 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 211 transitions, 2374 flow [2024-06-20 15:27:21,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:21,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:21,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:21,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:27:21,637 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:21,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:21,637 INFO L85 PathProgramCache]: Analyzing trace with hash 628897646, now seen corresponding path program 1 times [2024-06-20 15:27:21,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:21,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412744518] [2024-06-20 15:27:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:21,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:21,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:21,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412744518] [2024-06-20 15:27:21,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412744518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:21,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:21,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:21,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483089492] [2024-06-20 15:27:21,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:21,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:21,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:21,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:21,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 211 transitions, 2374 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:21,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:21,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:21,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:22,169 INFO L124 PetriNetUnfolderBase]: 1454/2415 cut-off events. [2024-06-20 15:27:22,170 INFO L125 PetriNetUnfolderBase]: For 93306/93306 co-relation queries the response was YES. [2024-06-20 15:27:22,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15528 conditions, 2415 events. 1454/2415 cut-off events. For 93306/93306 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13295 event pairs, 219 based on Foata normal form. 18/2431 useless extension candidates. Maximal degree in co-relation 15456. Up to 1696 conditions per place. [2024-06-20 15:27:22,188 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 52 changer transitions 0/257 dead transitions. [2024-06-20 15:27:22,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 257 transitions, 3184 flow [2024-06-20 15:27:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:22,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-20 15:27:22,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-20 15:27:22,190 INFO L175 Difference]: Start difference. First operand has 147 places, 211 transitions, 2374 flow. Second operand 8 states and 210 transitions. [2024-06-20 15:27:22,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 257 transitions, 3184 flow [2024-06-20 15:27:22,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 257 transitions, 3151 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:22,307 INFO L231 Difference]: Finished difference. Result has 153 places, 213 transitions, 2485 flow [2024-06-20 15:27:22,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2485, PETRI_PLACES=153, PETRI_TRANSITIONS=213} [2024-06-20 15:27:22,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-20 15:27:22,307 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 213 transitions, 2485 flow [2024-06-20 15:27:22,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:22,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:22,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:22,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:27:22,308 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:22,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:22,308 INFO L85 PathProgramCache]: Analyzing trace with hash 630775316, now seen corresponding path program 2 times [2024-06-20 15:27:22,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:22,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261588895] [2024-06-20 15:27:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:22,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:22,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:22,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261588895] [2024-06-20 15:27:22,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261588895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:22,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:22,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:22,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814639762] [2024-06-20 15:27:22,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:22,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:22,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:22,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:22,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:22,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 213 transitions, 2485 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:22,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:22,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:22,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:22,805 INFO L124 PetriNetUnfolderBase]: 1408/2353 cut-off events. [2024-06-20 15:27:22,805 INFO L125 PetriNetUnfolderBase]: For 87896/87896 co-relation queries the response was YES. [2024-06-20 15:27:22,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14797 conditions, 2353 events. 1408/2353 cut-off events. For 87896/87896 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12923 event pairs, 283 based on Foata normal form. 24/2375 useless extension candidates. Maximal degree in co-relation 14724. Up to 1891 conditions per place. [2024-06-20 15:27:22,825 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 200 selfloop transitions, 46 changer transitions 0/254 dead transitions. [2024-06-20 15:27:22,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 254 transitions, 3148 flow [2024-06-20 15:27:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:27:22,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:27:22,826 INFO L175 Difference]: Start difference. First operand has 153 places, 213 transitions, 2485 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:27:22,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 254 transitions, 3148 flow [2024-06-20 15:27:22,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 254 transitions, 3031 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:22,979 INFO L231 Difference]: Finished difference. Result has 156 places, 214 transitions, 2499 flow [2024-06-20 15:27:22,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2499, PETRI_PLACES=156, PETRI_TRANSITIONS=214} [2024-06-20 15:27:22,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-20 15:27:22,980 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 214 transitions, 2499 flow [2024-06-20 15:27:22,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:22,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:22,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:22,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:27:22,980 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:22,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:22,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2094764292, now seen corresponding path program 3 times [2024-06-20 15:27:22,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:22,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807802172] [2024-06-20 15:27:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:22,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:23,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:23,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807802172] [2024-06-20 15:27:23,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807802172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:23,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:23,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:23,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643689856] [2024-06-20 15:27:23,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:23,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:23,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:23,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:23,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:23,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:23,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 214 transitions, 2499 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:23,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:23,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:23,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:23,521 INFO L124 PetriNetUnfolderBase]: 1466/2457 cut-off events. [2024-06-20 15:27:23,521 INFO L125 PetriNetUnfolderBase]: For 89006/89020 co-relation queries the response was YES. [2024-06-20 15:27:23,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15238 conditions, 2457 events. 1466/2457 cut-off events. For 89006/89020 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13752 event pairs, 314 based on Foata normal form. 17/2468 useless extension candidates. Maximal degree in co-relation 15164. Up to 1869 conditions per place. [2024-06-20 15:27:23,542 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 148 selfloop transitions, 93 changer transitions 0/249 dead transitions. [2024-06-20 15:27:23,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 249 transitions, 3129 flow [2024-06-20 15:27:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:27:23,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:27:23,544 INFO L175 Difference]: Start difference. First operand has 156 places, 214 transitions, 2499 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:27:23,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 249 transitions, 3129 flow [2024-06-20 15:27:23,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 249 transitions, 3041 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:23,690 INFO L231 Difference]: Finished difference. Result has 158 places, 215 transitions, 2636 flow [2024-06-20 15:27:23,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2636, PETRI_PLACES=158, PETRI_TRANSITIONS=215} [2024-06-20 15:27:23,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-20 15:27:23,691 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 215 transitions, 2636 flow [2024-06-20 15:27:23,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:23,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:23,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:23,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:27:23,692 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:23,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash -3477620, now seen corresponding path program 4 times [2024-06-20 15:27:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:23,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033945805] [2024-06-20 15:27:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:23,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:23,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033945805] [2024-06-20 15:27:23,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033945805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:23,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:23,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:23,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237524051] [2024-06-20 15:27:23,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:23,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:23,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:23,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:23,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 215 transitions, 2636 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:23,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:23,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:23,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:24,168 INFO L124 PetriNetUnfolderBase]: 1507/2528 cut-off events. [2024-06-20 15:27:24,168 INFO L125 PetriNetUnfolderBase]: For 93069/93083 co-relation queries the response was YES. [2024-06-20 15:27:24,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15870 conditions, 2528 events. 1507/2528 cut-off events. For 93069/93083 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14298 event pairs, 309 based on Foata normal form. 13/2535 useless extension candidates. Maximal degree in co-relation 15795. Up to 1850 conditions per place. [2024-06-20 15:27:24,189 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 96 changer transitions 0/257 dead transitions. [2024-06-20 15:27:24,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 257 transitions, 3310 flow [2024-06-20 15:27:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-20 15:27:24,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:27:24,190 INFO L175 Difference]: Start difference. First operand has 158 places, 215 transitions, 2636 flow. Second operand 9 states and 225 transitions. [2024-06-20 15:27:24,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 257 transitions, 3310 flow [2024-06-20 15:27:24,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 257 transitions, 3111 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:24,381 INFO L231 Difference]: Finished difference. Result has 161 places, 216 transitions, 2665 flow [2024-06-20 15:27:24,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2665, PETRI_PLACES=161, PETRI_TRANSITIONS=216} [2024-06-20 15:27:24,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-20 15:27:24,382 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 216 transitions, 2665 flow [2024-06-20 15:27:24,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:24,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:24,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:24,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:27:24,382 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:24,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:24,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1035817898, now seen corresponding path program 5 times [2024-06-20 15:27:24,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:24,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964391751] [2024-06-20 15:27:24,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:24,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:24,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:24,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964391751] [2024-06-20 15:27:24,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964391751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:24,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:24,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:24,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224540934] [2024-06-20 15:27:24,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:24,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:24,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:24,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:24,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:24,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 216 transitions, 2665 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:24,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:24,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:24,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:24,829 INFO L124 PetriNetUnfolderBase]: 1565/2642 cut-off events. [2024-06-20 15:27:24,829 INFO L125 PetriNetUnfolderBase]: For 100605/100613 co-relation queries the response was YES. [2024-06-20 15:27:24,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16437 conditions, 2642 events. 1565/2642 cut-off events. For 100605/100613 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15224 event pairs, 336 based on Foata normal form. 17/2655 useless extension candidates. Maximal degree in co-relation 16361. Up to 2034 conditions per place. [2024-06-20 15:27:24,852 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 95 changer transitions 0/248 dead transitions. [2024-06-20 15:27:24,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 248 transitions, 3287 flow [2024-06-20 15:27:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:27:24,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:27:24,853 INFO L175 Difference]: Start difference. First operand has 161 places, 216 transitions, 2665 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:27:24,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 248 transitions, 3287 flow [2024-06-20 15:27:25,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 248 transitions, 3073 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:25,017 INFO L231 Difference]: Finished difference. Result has 161 places, 217 transitions, 2684 flow [2024-06-20 15:27:25,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2684, PETRI_PLACES=161, PETRI_TRANSITIONS=217} [2024-06-20 15:27:25,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-20 15:27:25,017 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 217 transitions, 2684 flow [2024-06-20 15:27:25,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:25,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:25,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:25,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:27:25,018 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:25,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:25,018 INFO L85 PathProgramCache]: Analyzing trace with hash 572752768, now seen corresponding path program 1 times [2024-06-20 15:27:25,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:25,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098269398] [2024-06-20 15:27:25,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:25,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:25,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:25,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098269398] [2024-06-20 15:27:25,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098269398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:25,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:25,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:25,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831637682] [2024-06-20 15:27:25,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:25,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:25,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:25,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 217 transitions, 2684 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:25,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:25,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:25,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:25,573 INFO L124 PetriNetUnfolderBase]: 1692/2865 cut-off events. [2024-06-20 15:27:25,573 INFO L125 PetriNetUnfolderBase]: For 115521/115529 co-relation queries the response was YES. [2024-06-20 15:27:25,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18149 conditions, 2865 events. 1692/2865 cut-off events. For 115521/115529 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16967 event pairs, 358 based on Foata normal form. 13/2874 useless extension candidates. Maximal degree in co-relation 18072. Up to 1800 conditions per place. [2024-06-20 15:27:25,594 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 147 selfloop transitions, 99 changer transitions 0/254 dead transitions. [2024-06-20 15:27:25,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 254 transitions, 3504 flow [2024-06-20 15:27:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:27:25,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-20 15:27:25,595 INFO L175 Difference]: Start difference. First operand has 161 places, 217 transitions, 2684 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:27:25,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 254 transitions, 3504 flow [2024-06-20 15:27:25,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 254 transitions, 3297 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:25,776 INFO L231 Difference]: Finished difference. Result has 163 places, 219 transitions, 2747 flow [2024-06-20 15:27:25,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2477, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2747, PETRI_PLACES=163, PETRI_TRANSITIONS=219} [2024-06-20 15:27:25,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-20 15:27:25,777 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 219 transitions, 2747 flow [2024-06-20 15:27:25,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:25,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:25,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:25,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:27:25,778 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:25,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash 784133375, now seen corresponding path program 1 times [2024-06-20 15:27:25,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:25,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928098251] [2024-06-20 15:27:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:25,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:25,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:25,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928098251] [2024-06-20 15:27:25,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928098251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:25,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:25,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:25,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684219254] [2024-06-20 15:27:25,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:25,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:25,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:25,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:25,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:25,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:25,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 219 transitions, 2747 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:25,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:25,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:25,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:26,230 INFO L124 PetriNetUnfolderBase]: 1705/2890 cut-off events. [2024-06-20 15:27:26,230 INFO L125 PetriNetUnfolderBase]: For 113605/113613 co-relation queries the response was YES. [2024-06-20 15:27:26,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18385 conditions, 2890 events. 1705/2890 cut-off events. For 113605/113613 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17134 event pairs, 388 based on Foata normal form. 2/2887 useless extension candidates. Maximal degree in co-relation 18307. Up to 2463 conditions per place. [2024-06-20 15:27:26,255 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 50 changer transitions 0/263 dead transitions. [2024-06-20 15:27:26,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 263 transitions, 3711 flow [2024-06-20 15:27:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:27:26,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 15:27:26,257 INFO L175 Difference]: Start difference. First operand has 163 places, 219 transitions, 2747 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:27:26,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 263 transitions, 3711 flow [2024-06-20 15:27:26,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 263 transitions, 3574 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:26,475 INFO L231 Difference]: Finished difference. Result has 169 places, 237 transitions, 2984 flow [2024-06-20 15:27:26,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2984, PETRI_PLACES=169, PETRI_TRANSITIONS=237} [2024-06-20 15:27:26,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-20 15:27:26,476 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 237 transitions, 2984 flow [2024-06-20 15:27:26,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:26,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:26,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:26,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:27:26,476 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:26,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:26,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1611876245, now seen corresponding path program 2 times [2024-06-20 15:27:26,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:26,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921130692] [2024-06-20 15:27:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:26,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:26,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:26,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921130692] [2024-06-20 15:27:26,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921130692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:26,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:26,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:26,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766562749] [2024-06-20 15:27:26,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:26,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:26,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:26,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:26,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 237 transitions, 2984 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:26,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:26,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:26,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:27,084 INFO L124 PetriNetUnfolderBase]: 1728/2943 cut-off events. [2024-06-20 15:27:27,084 INFO L125 PetriNetUnfolderBase]: For 118047/118049 co-relation queries the response was YES. [2024-06-20 15:27:27,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19254 conditions, 2943 events. 1728/2943 cut-off events. For 118047/118049 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17575 event pairs, 370 based on Foata normal form. 1/2942 useless extension candidates. Maximal degree in co-relation 19171. Up to 2594 conditions per place. [2024-06-20 15:27:27,116 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 36 changer transitions 0/268 dead transitions. [2024-06-20 15:27:27,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 268 transitions, 3803 flow [2024-06-20 15:27:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:27:27,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:27:27,119 INFO L175 Difference]: Start difference. First operand has 169 places, 237 transitions, 2984 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:27:27,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 268 transitions, 3803 flow [2024-06-20 15:27:27,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 268 transitions, 3733 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-20 15:27:27,281 INFO L231 Difference]: Finished difference. Result has 177 places, 249 transitions, 3181 flow [2024-06-20 15:27:27,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3181, PETRI_PLACES=177, PETRI_TRANSITIONS=249} [2024-06-20 15:27:27,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-20 15:27:27,282 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 249 transitions, 3181 flow [2024-06-20 15:27:27,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:27,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:27,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:27,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:27:27,282 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:27,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:27,283 INFO L85 PathProgramCache]: Analyzing trace with hash -705904862, now seen corresponding path program 6 times [2024-06-20 15:27:27,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:27,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998511548] [2024-06-20 15:27:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:27,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:27,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998511548] [2024-06-20 15:27:27,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998511548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:27,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:27,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:27,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980805455] [2024-06-20 15:27:27,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:27,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:27,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:27,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:27,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:27,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 249 transitions, 3181 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:27,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:27,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:27,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:27,868 INFO L124 PetriNetUnfolderBase]: 1700/2881 cut-off events. [2024-06-20 15:27:27,868 INFO L125 PetriNetUnfolderBase]: For 121739/121739 co-relation queries the response was YES. [2024-06-20 15:27:27,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18418 conditions, 2881 events. 1700/2881 cut-off events. For 121739/121739 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17014 event pairs, 390 based on Foata normal form. 16/2866 useless extension candidates. Maximal degree in co-relation 18331. Up to 2257 conditions per place. [2024-06-20 15:27:27,895 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 97 changer transitions 0/281 dead transitions. [2024-06-20 15:27:27,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 281 transitions, 3845 flow [2024-06-20 15:27:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:27:27,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:27:27,897 INFO L175 Difference]: Start difference. First operand has 177 places, 249 transitions, 3181 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:27:27,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 281 transitions, 3845 flow [2024-06-20 15:27:28,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 281 transitions, 3739 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:28,092 INFO L231 Difference]: Finished difference. Result has 182 places, 249 transitions, 3280 flow [2024-06-20 15:27:28,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3280, PETRI_PLACES=182, PETRI_TRANSITIONS=249} [2024-06-20 15:27:28,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-20 15:27:28,092 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 249 transitions, 3280 flow [2024-06-20 15:27:28,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:28,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:28,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:28,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:27:28,093 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:28,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:28,093 INFO L85 PathProgramCache]: Analyzing trace with hash -705908582, now seen corresponding path program 7 times [2024-06-20 15:27:28,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:28,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862160974] [2024-06-20 15:27:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:28,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:28,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:28,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862160974] [2024-06-20 15:27:28,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862160974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:28,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:28,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:28,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717266827] [2024-06-20 15:27:28,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:28,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:28,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:28,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:28,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 249 transitions, 3280 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:28,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:28,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:28,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:28,683 INFO L124 PetriNetUnfolderBase]: 1741/2952 cut-off events. [2024-06-20 15:27:28,683 INFO L125 PetriNetUnfolderBase]: For 126004/126004 co-relation queries the response was YES. [2024-06-20 15:27:28,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19020 conditions, 2952 events. 1741/2952 cut-off events. For 126004/126004 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17609 event pairs, 385 based on Foata normal form. 12/2933 useless extension candidates. Maximal degree in co-relation 18932. Up to 2238 conditions per place. [2024-06-20 15:27:28,710 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 100 changer transitions 0/289 dead transitions. [2024-06-20 15:27:28,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 289 transitions, 4020 flow [2024-06-20 15:27:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-20 15:27:28,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-20 15:27:28,715 INFO L175 Difference]: Start difference. First operand has 182 places, 249 transitions, 3280 flow. Second operand 9 states and 221 transitions. [2024-06-20 15:27:28,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 289 transitions, 4020 flow [2024-06-20 15:27:28,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 289 transitions, 3890 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:28,893 INFO L231 Difference]: Finished difference. Result has 186 places, 250 transitions, 3392 flow [2024-06-20 15:27:28,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3392, PETRI_PLACES=186, PETRI_TRANSITIONS=250} [2024-06-20 15:27:28,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-20 15:27:28,894 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 250 transitions, 3392 flow [2024-06-20 15:27:28,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:28,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:28,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:28,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:27:28,895 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:28,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1711816828, now seen corresponding path program 8 times [2024-06-20 15:27:28,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:28,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244915554] [2024-06-20 15:27:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:28,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:28,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:28,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244915554] [2024-06-20 15:27:28,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244915554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:28,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:28,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:28,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028646331] [2024-06-20 15:27:28,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:28,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:28,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:28,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:28,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:29,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:29,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 250 transitions, 3392 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:29,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:29,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:29,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:29,401 INFO L124 PetriNetUnfolderBase]: 1774/3024 cut-off events. [2024-06-20 15:27:29,402 INFO L125 PetriNetUnfolderBase]: For 135147/135153 co-relation queries the response was YES. [2024-06-20 15:27:29,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19374 conditions, 3024 events. 1774/3024 cut-off events. For 135147/135153 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18256 event pairs, 404 based on Foata normal form. 20/3025 useless extension candidates. Maximal degree in co-relation 19284. Up to 2393 conditions per place. [2024-06-20 15:27:29,428 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 177 selfloop transitions, 94 changer transitions 0/279 dead transitions. [2024-06-20 15:27:29,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 279 transitions, 4074 flow [2024-06-20 15:27:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:27:29,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:27:29,429 INFO L175 Difference]: Start difference. First operand has 186 places, 250 transitions, 3392 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:27:29,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 279 transitions, 4074 flow [2024-06-20 15:27:29,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 279 transitions, 3846 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:29,645 INFO L231 Difference]: Finished difference. Result has 186 places, 251 transitions, 3399 flow [2024-06-20 15:27:29,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3399, PETRI_PLACES=186, PETRI_TRANSITIONS=251} [2024-06-20 15:27:29,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-20 15:27:29,646 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 251 transitions, 3399 flow [2024-06-20 15:27:29,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:29,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:29,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:29,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:27:29,646 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:29,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1246932014, now seen corresponding path program 2 times [2024-06-20 15:27:29,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:29,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746219657] [2024-06-20 15:27:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:29,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:29,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746219657] [2024-06-20 15:27:29,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746219657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:29,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:29,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379351791] [2024-06-20 15:27:29,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:29,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:29,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:29,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:29,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:29,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:29,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 251 transitions, 3399 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:29,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:29,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:29,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:30,178 INFO L124 PetriNetUnfolderBase]: 1815/3100 cut-off events. [2024-06-20 15:27:30,179 INFO L125 PetriNetUnfolderBase]: For 137543/137549 co-relation queries the response was YES. [2024-06-20 15:27:30,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19709 conditions, 3100 events. 1815/3100 cut-off events. For 137543/137549 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18865 event pairs, 404 based on Foata normal form. 16/3097 useless extension candidates. Maximal degree in co-relation 19618. Up to 2374 conditions per place. [2024-06-20 15:27:30,208 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 95 changer transitions 0/283 dead transitions. [2024-06-20 15:27:30,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 283 transitions, 4103 flow [2024-06-20 15:27:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:27:30,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:27:30,209 INFO L175 Difference]: Start difference. First operand has 186 places, 251 transitions, 3399 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:27:30,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 283 transitions, 4103 flow [2024-06-20 15:27:30,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 283 transitions, 3890 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:30,432 INFO L231 Difference]: Finished difference. Result has 188 places, 252 transitions, 3422 flow [2024-06-20 15:27:30,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3422, PETRI_PLACES=188, PETRI_TRANSITIONS=252} [2024-06-20 15:27:30,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-20 15:27:30,432 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 252 transitions, 3422 flow [2024-06-20 15:27:30,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:30,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:30,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:30,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:27:30,433 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:30,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:30,433 INFO L85 PathProgramCache]: Analyzing trace with hash -685071406, now seen corresponding path program 3 times [2024-06-20 15:27:30,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:30,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289331937] [2024-06-20 15:27:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:30,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:30,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:30,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289331937] [2024-06-20 15:27:30,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289331937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:30,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:30,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:30,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99086036] [2024-06-20 15:27:30,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:30,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:30,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:30,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:30,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:30,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:30,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 252 transitions, 3422 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:30,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:30,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:30,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:30,947 INFO L124 PetriNetUnfolderBase]: 1795/3078 cut-off events. [2024-06-20 15:27:30,947 INFO L125 PetriNetUnfolderBase]: For 129987/129993 co-relation queries the response was YES. [2024-06-20 15:27:30,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18958 conditions, 3078 events. 1795/3078 cut-off events. For 129987/129993 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18781 event pairs, 349 based on Foata normal form. 16/3075 useless extension candidates. Maximal degree in co-relation 18866. Up to 1713 conditions per place. [2024-06-20 15:27:30,976 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 171 selfloop transitions, 104 changer transitions 0/283 dead transitions. [2024-06-20 15:27:30,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 283 transitions, 4014 flow [2024-06-20 15:27:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:27:30,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:27:30,977 INFO L175 Difference]: Start difference. First operand has 188 places, 252 transitions, 3422 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:27:30,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 283 transitions, 4014 flow [2024-06-20 15:27:31,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 283 transitions, 3786 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:31,362 INFO L231 Difference]: Finished difference. Result has 188 places, 251 transitions, 3332 flow [2024-06-20 15:27:31,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3332, PETRI_PLACES=188, PETRI_TRANSITIONS=251} [2024-06-20 15:27:31,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-20 15:27:31,362 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 251 transitions, 3332 flow [2024-06-20 15:27:31,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:31,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:31,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:31,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:27:31,363 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:31,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:31,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1021601257, now seen corresponding path program 3 times [2024-06-20 15:27:31,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:31,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897229525] [2024-06-20 15:27:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:31,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:31,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897229525] [2024-06-20 15:27:31,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897229525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:31,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:31,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:31,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495484981] [2024-06-20 15:27:31,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:31,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:31,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:31,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:31,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 251 transitions, 3332 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:31,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:31,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:31,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:31,849 INFO L124 PetriNetUnfolderBase]: 1800/3056 cut-off events. [2024-06-20 15:27:31,849 INFO L125 PetriNetUnfolderBase]: For 118215/118215 co-relation queries the response was YES. [2024-06-20 15:27:31,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18908 conditions, 3056 events. 1800/3056 cut-off events. For 118215/118215 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18482 event pairs, 400 based on Foata normal form. 1/3041 useless extension candidates. Maximal degree in co-relation 18816. Up to 2619 conditions per place. [2024-06-20 15:27:31,876 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 210 selfloop transitions, 64 changer transitions 0/282 dead transitions. [2024-06-20 15:27:31,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 282 transitions, 4371 flow [2024-06-20 15:27:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:27:31,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:27:31,877 INFO L175 Difference]: Start difference. First operand has 188 places, 251 transitions, 3332 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:27:31,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 282 transitions, 4371 flow [2024-06-20 15:27:32,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 282 transitions, 4071 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:32,115 INFO L231 Difference]: Finished difference. Result has 189 places, 260 transitions, 3339 flow [2024-06-20 15:27:32,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3339, PETRI_PLACES=189, PETRI_TRANSITIONS=260} [2024-06-20 15:27:32,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-20 15:27:32,116 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 260 transitions, 3339 flow [2024-06-20 15:27:32,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:32,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:32,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:32,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:27:32,117 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:32,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash -565135467, now seen corresponding path program 4 times [2024-06-20 15:27:32,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:32,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409925947] [2024-06-20 15:27:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:32,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:32,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:32,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409925947] [2024-06-20 15:27:32,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409925947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:32,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:32,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:32,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548202287] [2024-06-20 15:27:32,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:32,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:32,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:32,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:32,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:32,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:32,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 260 transitions, 3339 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:32,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:32,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:32,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:32,644 INFO L124 PetriNetUnfolderBase]: 1805/3067 cut-off events. [2024-06-20 15:27:32,644 INFO L125 PetriNetUnfolderBase]: For 119630/119630 co-relation queries the response was YES. [2024-06-20 15:27:32,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18541 conditions, 3067 events. 1805/3067 cut-off events. For 119630/119630 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18575 event pairs, 400 based on Foata normal form. 1/3052 useless extension candidates. Maximal degree in co-relation 18448. Up to 2623 conditions per place. [2024-06-20 15:27:32,669 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 69 changer transitions 0/282 dead transitions. [2024-06-20 15:27:32,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 282 transitions, 4211 flow [2024-06-20 15:27:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:27:32,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 15:27:32,670 INFO L175 Difference]: Start difference. First operand has 189 places, 260 transitions, 3339 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:27:32,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 282 transitions, 4211 flow [2024-06-20 15:27:32,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 282 transitions, 4110 flow, removed 43 selfloop flow, removed 1 redundant places. [2024-06-20 15:27:32,912 INFO L231 Difference]: Finished difference. Result has 194 places, 264 transitions, 3458 flow [2024-06-20 15:27:32,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3458, PETRI_PLACES=194, PETRI_TRANSITIONS=264} [2024-06-20 15:27:32,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-20 15:27:32,913 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 264 transitions, 3458 flow [2024-06-20 15:27:32,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:32,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:32,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:27:32,913 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:32,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2128800201, now seen corresponding path program 5 times [2024-06-20 15:27:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:32,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051370888] [2024-06-20 15:27:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:32,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:33,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:33,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051370888] [2024-06-20 15:27:33,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051370888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:33,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:33,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:33,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658984564] [2024-06-20 15:27:33,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:33,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:33,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:33,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:33,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:33,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:33,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 264 transitions, 3458 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:33,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:33,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:33,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:33,440 INFO L124 PetriNetUnfolderBase]: 1810/3080 cut-off events. [2024-06-20 15:27:33,440 INFO L125 PetriNetUnfolderBase]: For 123431/123431 co-relation queries the response was YES. [2024-06-20 15:27:33,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18716 conditions, 3080 events. 1810/3080 cut-off events. For 123431/123431 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18670 event pairs, 385 based on Foata normal form. 1/3068 useless extension candidates. Maximal degree in co-relation 18621. Up to 2588 conditions per place. [2024-06-20 15:27:33,469 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 96 changer transitions 0/292 dead transitions. [2024-06-20 15:27:33,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 292 transitions, 4366 flow [2024-06-20 15:27:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:27:33,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:27:33,470 INFO L175 Difference]: Start difference. First operand has 194 places, 264 transitions, 3458 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:27:33,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 292 transitions, 4366 flow [2024-06-20 15:27:33,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 292 transitions, 4204 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:33,754 INFO L231 Difference]: Finished difference. Result has 199 places, 268 transitions, 3627 flow [2024-06-20 15:27:33,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3304, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3627, PETRI_PLACES=199, PETRI_TRANSITIONS=268} [2024-06-20 15:27:33,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-20 15:27:33,755 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 268 transitions, 3627 flow [2024-06-20 15:27:33,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:33,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:33,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:33,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:27:33,755 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:33,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2135466441, now seen corresponding path program 6 times [2024-06-20 15:27:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:33,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251163958] [2024-06-20 15:27:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:33,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:33,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:33,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251163958] [2024-06-20 15:27:33,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251163958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:33,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:33,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:33,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482809837] [2024-06-20 15:27:33,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:33,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:33,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:33,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:33,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:33,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:33,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 268 transitions, 3627 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:33,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:33,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:33,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:34,288 INFO L124 PetriNetUnfolderBase]: 1807/3080 cut-off events. [2024-06-20 15:27:34,288 INFO L125 PetriNetUnfolderBase]: For 126414/126416 co-relation queries the response was YES. [2024-06-20 15:27:34,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18932 conditions, 3080 events. 1807/3080 cut-off events. For 126414/126416 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18664 event pairs, 371 based on Foata normal form. 1/3079 useless extension candidates. Maximal degree in co-relation 18835. Up to 2586 conditions per place. [2024-06-20 15:27:34,316 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 194 selfloop transitions, 95 changer transitions 0/297 dead transitions. [2024-06-20 15:27:34,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 297 transitions, 4399 flow [2024-06-20 15:27:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:27:34,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-20 15:27:34,317 INFO L175 Difference]: Start difference. First operand has 199 places, 268 transitions, 3627 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:27:34,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 297 transitions, 4399 flow [2024-06-20 15:27:34,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 297 transitions, 4257 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:34,600 INFO L231 Difference]: Finished difference. Result has 203 places, 268 transitions, 3707 flow [2024-06-20 15:27:34,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3707, PETRI_PLACES=203, PETRI_TRANSITIONS=268} [2024-06-20 15:27:34,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-20 15:27:34,601 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 268 transitions, 3707 flow [2024-06-20 15:27:34,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:34,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:34,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:34,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:27:34,602 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:34,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1431291110, now seen corresponding path program 1 times [2024-06-20 15:27:34,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:34,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224654410] [2024-06-20 15:27:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:34,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:34,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:34,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224654410] [2024-06-20 15:27:34,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224654410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:34,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:34,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:34,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691585963] [2024-06-20 15:27:34,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:34,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:34,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:34,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:34,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 268 transitions, 3707 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:34,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:34,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:34,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:35,091 INFO L124 PetriNetUnfolderBase]: 1828/3116 cut-off events. [2024-06-20 15:27:35,091 INFO L125 PetriNetUnfolderBase]: For 136435/136441 co-relation queries the response was YES. [2024-06-20 15:27:35,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19486 conditions, 3116 events. 1828/3116 cut-off events. For 136435/136441 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18982 event pairs, 394 based on Foata normal form. 2/3114 useless extension candidates. Maximal degree in co-relation 19388. Up to 2652 conditions per place. [2024-06-20 15:27:35,121 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 212 selfloop transitions, 80 changer transitions 0/300 dead transitions. [2024-06-20 15:27:35,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 300 transitions, 4718 flow [2024-06-20 15:27:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:27:35,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:27:35,122 INFO L175 Difference]: Start difference. First operand has 203 places, 268 transitions, 3707 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:27:35,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 300 transitions, 4718 flow [2024-06-20 15:27:35,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 300 transitions, 4574 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:35,365 INFO L231 Difference]: Finished difference. Result has 204 places, 277 transitions, 3886 flow [2024-06-20 15:27:35,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3570, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3886, PETRI_PLACES=204, PETRI_TRANSITIONS=277} [2024-06-20 15:27:35,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-20 15:27:35,366 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 277 transitions, 3886 flow [2024-06-20 15:27:35,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:35,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:35,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:35,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:27:35,367 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:35,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:35,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1431170954, now seen corresponding path program 1 times [2024-06-20 15:27:35,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:35,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41796776] [2024-06-20 15:27:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:35,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:35,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:35,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41796776] [2024-06-20 15:27:35,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41796776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:35,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:35,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:35,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083754182] [2024-06-20 15:27:35,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:35,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:35,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:35,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:35,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 277 transitions, 3886 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:35,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:35,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:35,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:35,887 INFO L124 PetriNetUnfolderBase]: 1841/3133 cut-off events. [2024-06-20 15:27:35,887 INFO L125 PetriNetUnfolderBase]: For 138034/138042 co-relation queries the response was YES. [2024-06-20 15:27:35,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19660 conditions, 3133 events. 1841/3133 cut-off events. For 138034/138042 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19074 event pairs, 396 based on Foata normal form. 2/3130 useless extension candidates. Maximal degree in co-relation 19562. Up to 2577 conditions per place. [2024-06-20 15:27:35,918 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 89 changer transitions 0/317 dead transitions. [2024-06-20 15:27:35,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 317 transitions, 4974 flow [2024-06-20 15:27:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:27:35,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:27:35,920 INFO L175 Difference]: Start difference. First operand has 204 places, 277 transitions, 3886 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:27:35,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 317 transitions, 4974 flow [2024-06-20 15:27:36,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 317 transitions, 4851 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:36,274 INFO L231 Difference]: Finished difference. Result has 211 places, 292 transitions, 4215 flow [2024-06-20 15:27:36,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4215, PETRI_PLACES=211, PETRI_TRANSITIONS=292} [2024-06-20 15:27:36,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-20 15:27:36,274 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 292 transitions, 4215 flow [2024-06-20 15:27:36,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:36,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:36,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:36,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:27:36,275 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:36,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:36,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1431171140, now seen corresponding path program 2 times [2024-06-20 15:27:36,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:36,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520484570] [2024-06-20 15:27:36,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:36,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:36,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:36,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520484570] [2024-06-20 15:27:36,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520484570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:36,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:36,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:36,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716483246] [2024-06-20 15:27:36,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:36,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:36,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:36,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:36,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:36,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:36,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 292 transitions, 4215 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:36,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:36,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:36,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:36,852 INFO L124 PetriNetUnfolderBase]: 1846/3144 cut-off events. [2024-06-20 15:27:36,852 INFO L125 PetriNetUnfolderBase]: For 146197/146205 co-relation queries the response was YES. [2024-06-20 15:27:36,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20408 conditions, 3144 events. 1846/3144 cut-off events. For 146197/146205 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19170 event pairs, 392 based on Foata normal form. 2/3141 useless extension candidates. Maximal degree in co-relation 20307. Up to 2676 conditions per place. [2024-06-20 15:27:36,943 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 230 selfloop transitions, 80 changer transitions 0/318 dead transitions. [2024-06-20 15:27:36,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 318 transitions, 5063 flow [2024-06-20 15:27:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:27:36,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-20 15:27:36,944 INFO L175 Difference]: Start difference. First operand has 211 places, 292 transitions, 4215 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:27:36,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 318 transitions, 5063 flow [2024-06-20 15:27:37,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 318 transitions, 4975 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:37,375 INFO L231 Difference]: Finished difference. Result has 216 places, 295 transitions, 4343 flow [2024-06-20 15:27:37,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4343, PETRI_PLACES=216, PETRI_TRANSITIONS=295} [2024-06-20 15:27:37,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-20 15:27:37,376 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 295 transitions, 4343 flow [2024-06-20 15:27:37,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:37,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:37,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:37,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:27:37,377 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:37,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1743932792, now seen corresponding path program 3 times [2024-06-20 15:27:37,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:37,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314798724] [2024-06-20 15:27:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:37,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:37,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314798724] [2024-06-20 15:27:37,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314798724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:37,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:37,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:37,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590667850] [2024-06-20 15:27:37,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:37,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:37,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:37,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:37,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:37,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:37,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 295 transitions, 4343 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:37,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:37,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:37,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:37,926 INFO L124 PetriNetUnfolderBase]: 1843/3142 cut-off events. [2024-06-20 15:27:37,926 INFO L125 PetriNetUnfolderBase]: For 148280/148282 co-relation queries the response was YES. [2024-06-20 15:27:37,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20475 conditions, 3142 events. 1843/3142 cut-off events. For 148280/148282 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19130 event pairs, 369 based on Foata normal form. 1/3141 useless extension candidates. Maximal degree in co-relation 20372. Up to 2787 conditions per place. [2024-06-20 15:27:37,957 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 269 selfloop transitions, 36 changer transitions 0/313 dead transitions. [2024-06-20 15:27:37,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 313 transitions, 5023 flow [2024-06-20 15:27:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:27:37,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-20 15:27:37,958 INFO L175 Difference]: Start difference. First operand has 216 places, 295 transitions, 4343 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:27:37,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 313 transitions, 5023 flow [2024-06-20 15:27:38,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 313 transitions, 4833 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:38,301 INFO L231 Difference]: Finished difference. Result has 218 places, 295 transitions, 4237 flow [2024-06-20 15:27:38,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4155, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4237, PETRI_PLACES=218, PETRI_TRANSITIONS=295} [2024-06-20 15:27:38,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-20 15:27:38,302 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 295 transitions, 4237 flow [2024-06-20 15:27:38,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:38,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:38,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:38,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:27:38,302 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:38,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1110561440, now seen corresponding path program 2 times [2024-06-20 15:27:38,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:38,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957448061] [2024-06-20 15:27:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:38,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:38,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:38,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957448061] [2024-06-20 15:27:38,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957448061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:38,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:38,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:38,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653105452] [2024-06-20 15:27:38,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:38,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:38,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:38,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:38,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:38,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 295 transitions, 4237 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:38,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:38,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:38,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:38,997 INFO L124 PetriNetUnfolderBase]: 1885/3206 cut-off events. [2024-06-20 15:27:38,997 INFO L125 PetriNetUnfolderBase]: For 158903/158905 co-relation queries the response was YES. [2024-06-20 15:27:39,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21060 conditions, 3206 events. 1885/3206 cut-off events. For 158903/158905 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19549 event pairs, 370 based on Foata normal form. 2/3206 useless extension candidates. Maximal degree in co-relation 20956. Up to 2788 conditions per place. [2024-06-20 15:27:39,033 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 65 changer transitions 0/336 dead transitions. [2024-06-20 15:27:39,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 336 transitions, 5482 flow [2024-06-20 15:27:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:27:39,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:27:39,034 INFO L175 Difference]: Start difference. First operand has 218 places, 295 transitions, 4237 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:27:39,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 336 transitions, 5482 flow [2024-06-20 15:27:39,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 336 transitions, 5425 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:39,448 INFO L231 Difference]: Finished difference. Result has 222 places, 313 transitions, 4629 flow [2024-06-20 15:27:39,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4180, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4629, PETRI_PLACES=222, PETRI_TRANSITIONS=313} [2024-06-20 15:27:39,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-20 15:27:39,449 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 313 transitions, 4629 flow [2024-06-20 15:27:39,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:39,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:39,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:39,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:27:39,449 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:39,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:39,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1253802284, now seen corresponding path program 3 times [2024-06-20 15:27:39,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:39,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101092351] [2024-06-20 15:27:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:39,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:39,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:39,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101092351] [2024-06-20 15:27:39,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101092351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:39,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:39,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:39,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438685105] [2024-06-20 15:27:39,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:39,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:39,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:39,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:39,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:39,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:39,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 313 transitions, 4629 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:39,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:39,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:39,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:40,075 INFO L124 PetriNetUnfolderBase]: 1879/3196 cut-off events. [2024-06-20 15:27:40,075 INFO L125 PetriNetUnfolderBase]: For 164341/164343 co-relation queries the response was YES. [2024-06-20 15:27:40,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21503 conditions, 3196 events. 1879/3196 cut-off events. For 164341/164343 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19495 event pairs, 370 based on Foata normal form. 2/3196 useless extension candidates. Maximal degree in co-relation 21397. Up to 2784 conditions per place. [2024-06-20 15:27:40,111 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 65 changer transitions 0/336 dead transitions. [2024-06-20 15:27:40,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 336 transitions, 5501 flow [2024-06-20 15:27:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-20 15:27:40,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-20 15:27:40,114 INFO L175 Difference]: Start difference. First operand has 222 places, 313 transitions, 4629 flow. Second operand 9 states and 211 transitions. [2024-06-20 15:27:40,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 336 transitions, 5501 flow [2024-06-20 15:27:40,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 336 transitions, 5293 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:40,530 INFO L231 Difference]: Finished difference. Result has 228 places, 313 transitions, 4561 flow [2024-06-20 15:27:40,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4561, PETRI_PLACES=228, PETRI_TRANSITIONS=313} [2024-06-20 15:27:40,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-20 15:27:40,531 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 313 transitions, 4561 flow [2024-06-20 15:27:40,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:40,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:40,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:40,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:27:40,532 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:40,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:40,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1571196638, now seen corresponding path program 1 times [2024-06-20 15:27:40,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:40,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268705397] [2024-06-20 15:27:40,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:40,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:40,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:40,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268705397] [2024-06-20 15:27:40,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268705397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:40,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:40,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:40,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409850865] [2024-06-20 15:27:40,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:40,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:40,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:40,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:27:40,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 313 transitions, 4561 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:40,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:40,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:27:40,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:41,157 INFO L124 PetriNetUnfolderBase]: 1831/3145 cut-off events. [2024-06-20 15:27:41,157 INFO L125 PetriNetUnfolderBase]: For 180493/180495 co-relation queries the response was YES. [2024-06-20 15:27:41,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21252 conditions, 3145 events. 1831/3145 cut-off events. For 180493/180495 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19347 event pairs, 359 based on Foata normal form. 10/3132 useless extension candidates. Maximal degree in co-relation 21144. Up to 2624 conditions per place. [2024-06-20 15:27:41,191 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 253 selfloop transitions, 40 changer transitions 0/335 dead transitions. [2024-06-20 15:27:41,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 335 transitions, 5239 flow [2024-06-20 15:27:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:27:41,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:27:41,192 INFO L175 Difference]: Start difference. First operand has 228 places, 313 transitions, 4561 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:27:41,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 335 transitions, 5239 flow [2024-06-20 15:27:41,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 335 transitions, 5097 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:41,654 INFO L231 Difference]: Finished difference. Result has 228 places, 314 transitions, 4519 flow [2024-06-20 15:27:41,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4419, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4519, PETRI_PLACES=228, PETRI_TRANSITIONS=314} [2024-06-20 15:27:41,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-20 15:27:41,654 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 314 transitions, 4519 flow [2024-06-20 15:27:41,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:41,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:41,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:41,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:27:41,655 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:41,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:41,655 INFO L85 PathProgramCache]: Analyzing trace with hash -466733658, now seen corresponding path program 4 times [2024-06-20 15:27:41,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:41,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031457195] [2024-06-20 15:27:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:41,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:41,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:41,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031457195] [2024-06-20 15:27:41,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031457195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:41,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:41,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:41,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195381151] [2024-06-20 15:27:41,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:41,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:41,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:41,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:41,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 314 transitions, 4519 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:41,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:41,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:41,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:42,188 INFO L124 PetriNetUnfolderBase]: 1920/3259 cut-off events. [2024-06-20 15:27:42,188 INFO L125 PetriNetUnfolderBase]: For 176658/176664 co-relation queries the response was YES. [2024-06-20 15:27:42,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22013 conditions, 3259 events. 1920/3259 cut-off events. For 176658/176664 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19951 event pairs, 409 based on Foata normal form. 5/3254 useless extension candidates. Maximal degree in co-relation 21904. Up to 2785 conditions per place. [2024-06-20 15:27:42,224 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 83 changer transitions 0/338 dead transitions. [2024-06-20 15:27:42,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 338 transitions, 5531 flow [2024-06-20 15:27:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:27:42,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-20 15:27:42,225 INFO L175 Difference]: Start difference. First operand has 228 places, 314 transitions, 4519 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:27:42,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 338 transitions, 5531 flow [2024-06-20 15:27:42,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 338 transitions, 5451 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:42,616 INFO L231 Difference]: Finished difference. Result has 229 places, 317 transitions, 4668 flow [2024-06-20 15:27:42,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4668, PETRI_PLACES=229, PETRI_TRANSITIONS=317} [2024-06-20 15:27:42,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-20 15:27:42,617 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 317 transitions, 4668 flow [2024-06-20 15:27:42,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:42,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:42,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:42,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:27:42,617 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:42,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:42,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1922721958, now seen corresponding path program 5 times [2024-06-20 15:27:42,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:42,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072095715] [2024-06-20 15:27:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:42,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:42,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:42,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072095715] [2024-06-20 15:27:42,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072095715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:42,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:42,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426517879] [2024-06-20 15:27:42,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:42,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:42,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:42,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:42,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 317 transitions, 4668 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:42,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:42,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:42,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:43,165 INFO L124 PetriNetUnfolderBase]: 1925/3270 cut-off events. [2024-06-20 15:27:43,165 INFO L125 PetriNetUnfolderBase]: For 182611/182617 co-relation queries the response was YES. [2024-06-20 15:27:43,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22265 conditions, 3270 events. 1925/3270 cut-off events. For 182611/182617 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20040 event pairs, 409 based on Foata normal form. 5/3265 useless extension candidates. Maximal degree in co-relation 22155. Up to 2791 conditions per place. [2024-06-20 15:27:43,199 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 242 selfloop transitions, 88 changer transitions 0/338 dead transitions. [2024-06-20 15:27:43,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 338 transitions, 5577 flow [2024-06-20 15:27:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 15:27:43,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-20 15:27:43,205 INFO L175 Difference]: Start difference. First operand has 229 places, 317 transitions, 4668 flow. Second operand 6 states and 145 transitions. [2024-06-20 15:27:43,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 338 transitions, 5577 flow [2024-06-20 15:27:43,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 338 transitions, 5287 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:43,610 INFO L231 Difference]: Finished difference. Result has 230 places, 321 transitions, 4637 flow [2024-06-20 15:27:43,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4399, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4637, PETRI_PLACES=230, PETRI_TRANSITIONS=321} [2024-06-20 15:27:43,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-20 15:27:43,611 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 321 transitions, 4637 flow [2024-06-20 15:27:43,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:43,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:43,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:43,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:27:43,611 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:43,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1716411194, now seen corresponding path program 6 times [2024-06-20 15:27:43,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:43,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327227571] [2024-06-20 15:27:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:43,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:43,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:43,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327227571] [2024-06-20 15:27:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327227571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:43,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806468329] [2024-06-20 15:27:43,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:43,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:43,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:43,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:43,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 321 transitions, 4637 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:43,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:43,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:43,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:44,210 INFO L124 PetriNetUnfolderBase]: 1930/3270 cut-off events. [2024-06-20 15:27:44,210 INFO L125 PetriNetUnfolderBase]: For 184951/184951 co-relation queries the response was YES. [2024-06-20 15:27:44,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22313 conditions, 3270 events. 1930/3270 cut-off events. For 184951/184951 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20061 event pairs, 412 based on Foata normal form. 1/3253 useless extension candidates. Maximal degree in co-relation 22204. Up to 2797 conditions per place. [2024-06-20 15:27:44,245 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 94 changer transitions 0/345 dead transitions. [2024-06-20 15:27:44,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 345 transitions, 5555 flow [2024-06-20 15:27:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:27:44,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-20 15:27:44,247 INFO L175 Difference]: Start difference. First operand has 230 places, 321 transitions, 4637 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:27:44,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 345 transitions, 5555 flow [2024-06-20 15:27:44,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 345 transitions, 5424 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:44,771 INFO L231 Difference]: Finished difference. Result has 235 places, 324 transitions, 4756 flow [2024-06-20 15:27:44,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4756, PETRI_PLACES=235, PETRI_TRANSITIONS=324} [2024-06-20 15:27:44,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-20 15:27:44,772 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 324 transitions, 4756 flow [2024-06-20 15:27:44,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:44,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:44,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:44,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:27:44,772 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:44,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash -383159096, now seen corresponding path program 4 times [2024-06-20 15:27:44,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:44,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646238410] [2024-06-20 15:27:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:44,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:44,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:44,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646238410] [2024-06-20 15:27:44,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646238410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:44,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:44,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:44,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377446576] [2024-06-20 15:27:44,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:44,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:44,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:44,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:44,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:44,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:44,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 324 transitions, 4756 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:44,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:44,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:44,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:45,383 INFO L124 PetriNetUnfolderBase]: 1935/3275 cut-off events. [2024-06-20 15:27:45,383 INFO L125 PetriNetUnfolderBase]: For 191543/191543 co-relation queries the response was YES. [2024-06-20 15:27:45,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22534 conditions, 3275 events. 1935/3275 cut-off events. For 191543/191543 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20019 event pairs, 420 based on Foata normal form. 1/3256 useless extension candidates. Maximal degree in co-relation 22424. Up to 2693 conditions per place. [2024-06-20 15:27:45,416 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 230 selfloop transitions, 115 changer transitions 0/353 dead transitions. [2024-06-20 15:27:45,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 353 transitions, 6004 flow [2024-06-20 15:27:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:27:45,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:27:45,417 INFO L175 Difference]: Start difference. First operand has 235 places, 324 transitions, 4756 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:27:45,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 353 transitions, 6004 flow [2024-06-20 15:27:45,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 353 transitions, 5867 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:27:45,887 INFO L231 Difference]: Finished difference. Result has 238 places, 330 transitions, 4985 flow [2024-06-20 15:27:45,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4985, PETRI_PLACES=238, PETRI_TRANSITIONS=330} [2024-06-20 15:27:45,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-20 15:27:45,887 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 330 transitions, 4985 flow [2024-06-20 15:27:45,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:45,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:45,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:45,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:27:45,888 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:45,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1336875236, now seen corresponding path program 7 times [2024-06-20 15:27:45,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:45,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41078571] [2024-06-20 15:27:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:45,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:45,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:45,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41078571] [2024-06-20 15:27:45,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41078571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:45,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:45,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:45,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849745465] [2024-06-20 15:27:45,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:45,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:45,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:45,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:46,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:46,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 330 transitions, 4985 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:46,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:46,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:46,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:46,472 INFO L124 PetriNetUnfolderBase]: 1932/3278 cut-off events. [2024-06-20 15:27:46,472 INFO L125 PetriNetUnfolderBase]: For 197152/197152 co-relation queries the response was YES. [2024-06-20 15:27:46,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22670 conditions, 3278 events. 1932/3278 cut-off events. For 197152/197152 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20089 event pairs, 408 based on Foata normal form. 1/3264 useless extension candidates. Maximal degree in co-relation 22558. Up to 2801 conditions per place. [2024-06-20 15:27:46,505 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 247 selfloop transitions, 96 changer transitions 0/351 dead transitions. [2024-06-20 15:27:46,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 351 transitions, 5977 flow [2024-06-20 15:27:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 15:27:46,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-20 15:27:46,506 INFO L175 Difference]: Start difference. First operand has 238 places, 330 transitions, 4985 flow. Second operand 9 states and 204 transitions. [2024-06-20 15:27:46,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 351 transitions, 5977 flow [2024-06-20 15:27:46,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 351 transitions, 5861 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-20 15:27:46,932 INFO L231 Difference]: Finished difference. Result has 245 places, 330 transitions, 5067 flow [2024-06-20 15:27:46,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4869, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5067, PETRI_PLACES=245, PETRI_TRANSITIONS=330} [2024-06-20 15:27:46,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-20 15:27:46,933 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 330 transitions, 5067 flow [2024-06-20 15:27:46,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:46,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:46,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:46,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:27:46,934 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:46,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:46,934 INFO L85 PathProgramCache]: Analyzing trace with hash -367844856, now seen corresponding path program 8 times [2024-06-20 15:27:46,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:46,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107013063] [2024-06-20 15:27:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:46,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:47,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:47,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107013063] [2024-06-20 15:27:47,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107013063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:47,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:47,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261062762] [2024-06-20 15:27:47,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:47,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:47,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 330 transitions, 5067 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:47,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:47,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:47,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:47,514 INFO L124 PetriNetUnfolderBase]: 1929/3270 cut-off events. [2024-06-20 15:27:47,514 INFO L125 PetriNetUnfolderBase]: For 201130/201130 co-relation queries the response was YES. [2024-06-20 15:27:47,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22786 conditions, 3270 events. 1929/3270 cut-off events. For 201130/201130 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19980 event pairs, 408 based on Foata normal form. 1/3256 useless extension candidates. Maximal degree in co-relation 22671. Up to 2798 conditions per place. [2024-06-20 15:27:47,546 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 245 selfloop transitions, 95 changer transitions 0/348 dead transitions. [2024-06-20 15:27:47,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 348 transitions, 5929 flow [2024-06-20 15:27:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:27:47,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-20 15:27:47,548 INFO L175 Difference]: Start difference. First operand has 245 places, 330 transitions, 5067 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:27:47,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 348 transitions, 5929 flow [2024-06-20 15:27:48,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 348 transitions, 5711 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:48,104 INFO L231 Difference]: Finished difference. Result has 247 places, 330 transitions, 5045 flow [2024-06-20 15:27:48,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5045, PETRI_PLACES=247, PETRI_TRANSITIONS=330} [2024-06-20 15:27:48,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-20 15:27:48,104 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 330 transitions, 5045 flow [2024-06-20 15:27:48,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:48,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:48,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:48,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:27:48,105 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:48,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:48,105 INFO L85 PathProgramCache]: Analyzing trace with hash 625864, now seen corresponding path program 5 times [2024-06-20 15:27:48,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:48,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135303120] [2024-06-20 15:27:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:48,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:48,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:48,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135303120] [2024-06-20 15:27:48,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135303120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:48,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:48,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:48,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254853322] [2024-06-20 15:27:48,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:48,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:48,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:48,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:48,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:48,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:48,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 330 transitions, 5045 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:48,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:48,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:48,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:48,660 INFO L124 PetriNetUnfolderBase]: 1942/3289 cut-off events. [2024-06-20 15:27:48,660 INFO L125 PetriNetUnfolderBase]: For 210500/210500 co-relation queries the response was YES. [2024-06-20 15:27:48,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22974 conditions, 3289 events. 1942/3289 cut-off events. For 210500/210500 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20132 event pairs, 420 based on Foata normal form. 1/3270 useless extension candidates. Maximal degree in co-relation 22858. Up to 2699 conditions per place. [2024-06-20 15:27:48,697 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 227 selfloop transitions, 121 changer transitions 0/356 dead transitions. [2024-06-20 15:27:48,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 356 transitions, 6289 flow [2024-06-20 15:27:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:27:48,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-20 15:27:48,698 INFO L175 Difference]: Start difference. First operand has 247 places, 330 transitions, 5045 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:27:48,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 356 transitions, 6289 flow [2024-06-20 15:27:49,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 356 transitions, 6099 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:49,316 INFO L231 Difference]: Finished difference. Result has 248 places, 336 transitions, 5215 flow [2024-06-20 15:27:49,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4855, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5215, PETRI_PLACES=248, PETRI_TRANSITIONS=336} [2024-06-20 15:27:49,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-20 15:27:49,316 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 336 transitions, 5215 flow [2024-06-20 15:27:49,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:49,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:49,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:49,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:27:49,317 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:49,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:49,317 INFO L85 PathProgramCache]: Analyzing trace with hash -338883582, now seen corresponding path program 6 times [2024-06-20 15:27:49,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:49,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216273771] [2024-06-20 15:27:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:49,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:49,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:49,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216273771] [2024-06-20 15:27:49,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216273771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:49,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:49,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:49,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321495073] [2024-06-20 15:27:49,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:49,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:49,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:49,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:49,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:49,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:49,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 336 transitions, 5215 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:49,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:49,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:49,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:49,901 INFO L124 PetriNetUnfolderBase]: 1939/3295 cut-off events. [2024-06-20 15:27:49,901 INFO L125 PetriNetUnfolderBase]: For 213908/213918 co-relation queries the response was YES. [2024-06-20 15:27:49,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23052 conditions, 3295 events. 1939/3295 cut-off events. For 213908/213918 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20223 event pairs, 401 based on Foata normal form. 1/3291 useless extension candidates. Maximal degree in co-relation 22935. Up to 2943 conditions per place. [2024-06-20 15:27:49,938 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 300 selfloop transitions, 42 changer transitions 0/350 dead transitions. [2024-06-20 15:27:49,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 350 transitions, 5939 flow [2024-06-20 15:27:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:27:49,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-20 15:27:49,939 INFO L175 Difference]: Start difference. First operand has 248 places, 336 transitions, 5215 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:27:49,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 350 transitions, 5939 flow [2024-06-20 15:27:50,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 350 transitions, 5681 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:50,456 INFO L231 Difference]: Finished difference. Result has 252 places, 336 transitions, 5047 flow [2024-06-20 15:27:50,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4957, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5047, PETRI_PLACES=252, PETRI_TRANSITIONS=336} [2024-06-20 15:27:50,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-20 15:27:50,456 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 336 transitions, 5047 flow [2024-06-20 15:27:50,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:50,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:50,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:50,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:27:50,457 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:50,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1346615170, now seen corresponding path program 7 times [2024-06-20 15:27:50,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:50,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798785283] [2024-06-20 15:27:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:50,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:50,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:50,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798785283] [2024-06-20 15:27:50,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798785283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:50,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:50,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:50,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135553444] [2024-06-20 15:27:50,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:50,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:50,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:50,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:50,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:50,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:50,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 336 transitions, 5047 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:50,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:50,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:50,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:51,109 INFO L124 PetriNetUnfolderBase]: 1960/3333 cut-off events. [2024-06-20 15:27:51,109 INFO L125 PetriNetUnfolderBase]: For 220585/220587 co-relation queries the response was YES. [2024-06-20 15:27:51,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23275 conditions, 3333 events. 1960/3333 cut-off events. For 220585/220587 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20503 event pairs, 388 based on Foata normal form. 1/3331 useless extension candidates. Maximal degree in co-relation 23157. Up to 2869 conditions per place. [2024-06-20 15:27:51,150 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 289 selfloop transitions, 74 changer transitions 0/371 dead transitions. [2024-06-20 15:27:51,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 371 transitions, 6170 flow [2024-06-20 15:27:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:27:51,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:27:51,151 INFO L175 Difference]: Start difference. First operand has 252 places, 336 transitions, 5047 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:27:51,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 371 transitions, 6170 flow [2024-06-20 15:27:51,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 371 transitions, 6062 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:51,751 INFO L231 Difference]: Finished difference. Result has 253 places, 345 transitions, 5330 flow [2024-06-20 15:27:51,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4939, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5330, PETRI_PLACES=253, PETRI_TRANSITIONS=345} [2024-06-20 15:27:51,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-20 15:27:51,751 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 345 transitions, 5330 flow [2024-06-20 15:27:51,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:51,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:51,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:51,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:27:51,752 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:51,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1708159316, now seen corresponding path program 8 times [2024-06-20 15:27:51,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:51,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269070225] [2024-06-20 15:27:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:51,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:51,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269070225] [2024-06-20 15:27:51,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269070225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:51,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:51,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:51,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019054851] [2024-06-20 15:27:51,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:51,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:51,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:51,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:51,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:51,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 345 transitions, 5330 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:51,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:51,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:51,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:52,431 INFO L124 PetriNetUnfolderBase]: 1957/3329 cut-off events. [2024-06-20 15:27:52,431 INFO L125 PetriNetUnfolderBase]: For 226279/226281 co-relation queries the response was YES. [2024-06-20 15:27:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23586 conditions, 3329 events. 1957/3329 cut-off events. For 226279/226281 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20486 event pairs, 388 based on Foata normal form. 1/3327 useless extension candidates. Maximal degree in co-relation 23466. Up to 2867 conditions per place. [2024-06-20 15:27:52,467 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 290 selfloop transitions, 81 changer transitions 0/379 dead transitions. [2024-06-20 15:27:52,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 379 transitions, 6343 flow [2024-06-20 15:27:52,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:27:52,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:27:52,468 INFO L175 Difference]: Start difference. First operand has 253 places, 345 transitions, 5330 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:27:52,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 379 transitions, 6343 flow [2024-06-20 15:27:53,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 379 transitions, 6212 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 15:27:53,104 INFO L231 Difference]: Finished difference. Result has 258 places, 346 transitions, 5411 flow [2024-06-20 15:27:53,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5411, PETRI_PLACES=258, PETRI_TRANSITIONS=346} [2024-06-20 15:27:53,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-20 15:27:53,104 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 346 transitions, 5411 flow [2024-06-20 15:27:53,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:53,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:53,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:53,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:27:53,105 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:53,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:53,105 INFO L85 PathProgramCache]: Analyzing trace with hash 144696342, now seen corresponding path program 9 times [2024-06-20 15:27:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:53,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628860864] [2024-06-20 15:27:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:53,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:53,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628860864] [2024-06-20 15:27:53,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628860864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:53,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:53,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:53,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32878332] [2024-06-20 15:27:53,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:53,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:53,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:53,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:53,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 346 transitions, 5411 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:53,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:53,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:53,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:53,743 INFO L124 PetriNetUnfolderBase]: 1978/3358 cut-off events. [2024-06-20 15:27:53,743 INFO L125 PetriNetUnfolderBase]: For 237946/237946 co-relation queries the response was YES. [2024-06-20 15:27:53,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24087 conditions, 3358 events. 1978/3358 cut-off events. For 237946/237946 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20590 event pairs, 399 based on Foata normal form. 1/3346 useless extension candidates. Maximal degree in co-relation 23966. Up to 2715 conditions per place. [2024-06-20 15:27:53,778 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 147 changer transitions 0/382 dead transitions. [2024-06-20 15:27:53,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 382 transitions, 6694 flow [2024-06-20 15:27:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:27:53,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:27:53,779 INFO L175 Difference]: Start difference. First operand has 258 places, 346 transitions, 5411 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:27:53,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 382 transitions, 6694 flow [2024-06-20 15:27:54,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 382 transitions, 6461 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:54,381 INFO L231 Difference]: Finished difference. Result has 260 places, 356 transitions, 5804 flow [2024-06-20 15:27:54,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5804, PETRI_PLACES=260, PETRI_TRANSITIONS=356} [2024-06-20 15:27:54,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-20 15:27:54,381 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 356 transitions, 5804 flow [2024-06-20 15:27:54,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:54,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:54,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:54,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:27:54,382 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:54,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:54,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1568028826, now seen corresponding path program 9 times [2024-06-20 15:27:54,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:54,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552159614] [2024-06-20 15:27:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:54,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:54,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:54,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552159614] [2024-06-20 15:27:54,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552159614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:54,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:54,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:54,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528530112] [2024-06-20 15:27:54,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:54,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:54,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:54,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:54,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:54,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:54,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 356 transitions, 5804 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:54,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:54,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:54,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:55,008 INFO L124 PetriNetUnfolderBase]: 1975/3357 cut-off events. [2024-06-20 15:27:55,009 INFO L125 PetriNetUnfolderBase]: For 239255/239255 co-relation queries the response was YES. [2024-06-20 15:27:55,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24791 conditions, 3357 events. 1975/3357 cut-off events. For 239255/239255 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20670 event pairs, 392 based on Foata normal form. 1/3345 useless extension candidates. Maximal degree in co-relation 24668. Up to 2826 conditions per place. [2024-06-20 15:27:55,051 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 272 selfloop transitions, 99 changer transitions 0/379 dead transitions. [2024-06-20 15:27:55,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 379 transitions, 6758 flow [2024-06-20 15:27:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:27:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:27:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:27:55,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-20 15:27:55,053 INFO L175 Difference]: Start difference. First operand has 260 places, 356 transitions, 5804 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:27:55,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 379 transitions, 6758 flow [2024-06-20 15:27:55,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 379 transitions, 6592 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:27:55,718 INFO L231 Difference]: Finished difference. Result has 262 places, 356 transitions, 5849 flow [2024-06-20 15:27:55,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5849, PETRI_PLACES=262, PETRI_TRANSITIONS=356} [2024-06-20 15:27:55,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-20 15:27:55,718 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 356 transitions, 5849 flow [2024-06-20 15:27:55,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:55,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:55,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:55,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:27:55,719 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:55,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:55,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1568295736, now seen corresponding path program 10 times [2024-06-20 15:27:55,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:55,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402985917] [2024-06-20 15:27:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:55,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:55,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:55,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402985917] [2024-06-20 15:27:55,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402985917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:55,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:55,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:27:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787674484] [2024-06-20 15:27:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:55,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:27:55,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:27:55,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:27:55,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:55,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 356 transitions, 5849 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:55,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:55,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:55,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:56,446 INFO L124 PetriNetUnfolderBase]: 1972/3359 cut-off events. [2024-06-20 15:27:56,446 INFO L125 PetriNetUnfolderBase]: For 240575/240577 co-relation queries the response was YES. [2024-06-20 15:27:56,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24828 conditions, 3359 events. 1972/3359 cut-off events. For 240575/240577 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20697 event pairs, 378 based on Foata normal form. 1/3358 useless extension candidates. Maximal degree in co-relation 24703. Up to 2823 conditions per place. [2024-06-20 15:27:56,490 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 275 selfloop transitions, 101 changer transitions 0/384 dead transitions. [2024-06-20 15:27:56,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 384 transitions, 6695 flow [2024-06-20 15:27:56,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:27:56,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:27:56,491 INFO L175 Difference]: Start difference. First operand has 262 places, 356 transitions, 5849 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:27:56,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 384 transitions, 6695 flow [2024-06-20 15:27:57,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 384 transitions, 6465 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:57,182 INFO L231 Difference]: Finished difference. Result has 263 places, 356 transitions, 5863 flow [2024-06-20 15:27:57,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5863, PETRI_PLACES=263, PETRI_TRANSITIONS=356} [2024-06-20 15:27:57,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-20 15:27:57,182 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 356 transitions, 5863 flow [2024-06-20 15:27:57,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-20 15:27:57,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:57,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:27:57,183 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:57,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1694106086, now seen corresponding path program 10 times [2024-06-20 15:27:57,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:57,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731751542] [2024-06-20 15:27:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:57,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:57,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731751542] [2024-06-20 15:27:57,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731751542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:57,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:57,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:57,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712902682] [2024-06-20 15:27:57,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:57,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:57,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:57,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:57,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:57,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 356 transitions, 5863 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:57,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:57,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:57,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:57,832 INFO L124 PetriNetUnfolderBase]: 1982/3372 cut-off events. [2024-06-20 15:27:57,833 INFO L125 PetriNetUnfolderBase]: For 242695/242697 co-relation queries the response was YES. [2024-06-20 15:27:57,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25059 conditions, 3372 events. 1982/3372 cut-off events. For 242695/242697 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20814 event pairs, 374 based on Foata normal form. 2/3372 useless extension candidates. Maximal degree in co-relation 24934. Up to 2719 conditions per place. [2024-06-20 15:27:57,872 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 154 changer transitions 0/394 dead transitions. [2024-06-20 15:27:57,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 394 transitions, 7165 flow [2024-06-20 15:27:57,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 15:27:57,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-20 15:27:57,873 INFO L175 Difference]: Start difference. First operand has 263 places, 356 transitions, 5863 flow. Second operand 8 states and 206 transitions. [2024-06-20 15:27:57,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 394 transitions, 7165 flow [2024-06-20 15:27:58,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 394 transitions, 6890 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 15:27:58,603 INFO L231 Difference]: Finished difference. Result has 262 places, 362 transitions, 6067 flow [2024-06-20 15:27:58,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5600, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6067, PETRI_PLACES=262, PETRI_TRANSITIONS=362} [2024-06-20 15:27:58,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-20 15:27:58,604 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 362 transitions, 6067 flow [2024-06-20 15:27:58,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:58,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:58,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:58,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:27:58,604 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:58,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:58,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1774711840, now seen corresponding path program 11 times [2024-06-20 15:27:58,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:58,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12061252] [2024-06-20 15:27:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:58,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:58,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:58,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12061252] [2024-06-20 15:27:58,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12061252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:58,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:58,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:58,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511381834] [2024-06-20 15:27:58,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:58,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:58,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:58,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:58,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:58,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:58,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 362 transitions, 6067 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:58,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:58,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:58,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:59,311 INFO L124 PetriNetUnfolderBase]: 1992/3390 cut-off events. [2024-06-20 15:27:59,311 INFO L125 PetriNetUnfolderBase]: For 230105/230107 co-relation queries the response was YES. [2024-06-20 15:27:59,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25054 conditions, 3390 events. 1992/3390 cut-off events. For 230105/230107 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20912 event pairs, 379 based on Foata normal form. 2/3390 useless extension candidates. Maximal degree in co-relation 24931. Up to 2730 conditions per place. [2024-06-20 15:27:59,348 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 156 changer transitions 0/397 dead transitions. [2024-06-20 15:27:59,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 397 transitions, 7329 flow [2024-06-20 15:27:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 15:27:59,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 15:27:59,349 INFO L175 Difference]: Start difference. First operand has 262 places, 362 transitions, 6067 flow. Second operand 9 states and 222 transitions. [2024-06-20 15:27:59,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 397 transitions, 7329 flow [2024-06-20 15:28:00,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 397 transitions, 6954 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:00,025 INFO L231 Difference]: Finished difference. Result has 265 places, 368 transitions, 6145 flow [2024-06-20 15:28:00,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5712, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6145, PETRI_PLACES=265, PETRI_TRANSITIONS=368} [2024-06-20 15:28:00,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-20 15:28:00,025 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 368 transitions, 6145 flow [2024-06-20 15:28:00,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:00,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:00,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:00,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:28:00,026 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:00,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:00,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1346606242, now seen corresponding path program 2 times [2024-06-20 15:28:00,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:00,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126769709] [2024-06-20 15:28:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:00,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:00,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:00,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126769709] [2024-06-20 15:28:00,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126769709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:00,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:00,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:00,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137523198] [2024-06-20 15:28:00,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:00,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:00,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:00,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:28:00,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 368 transitions, 6145 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:00,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:00,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:28:00,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:00,681 INFO L124 PetriNetUnfolderBase]: 1929/3327 cut-off events. [2024-06-20 15:28:00,681 INFO L125 PetriNetUnfolderBase]: For 246453/246455 co-relation queries the response was YES. [2024-06-20 15:28:00,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24556 conditions, 3327 events. 1929/3327 cut-off events. For 246453/246455 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20797 event pairs, 283 based on Foata normal form. 9/3311 useless extension candidates. Maximal degree in co-relation 24433. Up to 2713 conditions per place. [2024-06-20 15:28:00,717 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 303 selfloop transitions, 32 changer transitions 0/391 dead transitions. [2024-06-20 15:28:00,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 391 transitions, 6919 flow [2024-06-20 15:28:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:28:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:28:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-20 15:28:00,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-20 15:28:00,718 INFO L175 Difference]: Start difference. First operand has 265 places, 368 transitions, 6145 flow. Second operand 5 states and 137 transitions. [2024-06-20 15:28:00,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 391 transitions, 6919 flow [2024-06-20 15:28:01,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 391 transitions, 6667 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:01,405 INFO L231 Difference]: Finished difference. Result has 264 places, 369 transitions, 5987 flow [2024-06-20 15:28:01,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5893, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5987, PETRI_PLACES=264, PETRI_TRANSITIONS=369} [2024-06-20 15:28:01,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-20 15:28:01,406 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 369 transitions, 5987 flow [2024-06-20 15:28:01,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:01,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:01,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:01,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:28:01,406 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:01,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1331369122, now seen corresponding path program 3 times [2024-06-20 15:28:01,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:01,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977460153] [2024-06-20 15:28:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:01,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:01,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977460153] [2024-06-20 15:28:01,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977460153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:01,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:01,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777679553] [2024-06-20 15:28:01,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:01,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:01,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:01,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:01,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:01,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:28:01,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 369 transitions, 5987 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:01,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:01,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:28:01,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:02,065 INFO L124 PetriNetUnfolderBase]: 1955/3369 cut-off events. [2024-06-20 15:28:02,065 INFO L125 PetriNetUnfolderBase]: For 243371/243373 co-relation queries the response was YES. [2024-06-20 15:28:02,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24556 conditions, 3369 events. 1955/3369 cut-off events. For 243371/243373 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21087 event pairs, 279 based on Foata normal form. 8/3352 useless extension candidates. Maximal degree in co-relation 24433. Up to 2723 conditions per place. [2024-06-20 15:28:02,102 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 305 selfloop transitions, 35 changer transitions 0/396 dead transitions. [2024-06-20 15:28:02,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 396 transitions, 6793 flow [2024-06-20 15:28:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:28:02,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:28:02,102 INFO L175 Difference]: Start difference. First operand has 264 places, 369 transitions, 5987 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:28:02,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 396 transitions, 6793 flow [2024-06-20 15:28:02,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 396 transitions, 6737 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:02,687 INFO L231 Difference]: Finished difference. Result has 267 places, 370 transitions, 6023 flow [2024-06-20 15:28:02,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6023, PETRI_PLACES=267, PETRI_TRANSITIONS=370} [2024-06-20 15:28:02,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-20 15:28:02,687 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 370 transitions, 6023 flow [2024-06-20 15:28:02,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:02,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:02,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:02,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:28:02,688 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:02,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1774702912, now seen corresponding path program 4 times [2024-06-20 15:28:02,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:02,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563668056] [2024-06-20 15:28:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:02,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:02,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:02,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563668056] [2024-06-20 15:28:02,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563668056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:02,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:02,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:02,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455775942] [2024-06-20 15:28:02,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:02,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:02,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:02,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:02,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:02,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:28:02,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 370 transitions, 6023 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:02,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:02,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:28:02,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:03,309 INFO L124 PetriNetUnfolderBase]: 1965/3387 cut-off events. [2024-06-20 15:28:03,309 INFO L125 PetriNetUnfolderBase]: For 246169/246171 co-relation queries the response was YES. [2024-06-20 15:28:03,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24539 conditions, 3387 events. 1965/3387 cut-off events. For 246169/246171 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21208 event pairs, 372 based on Foata normal form. 10/3372 useless extension candidates. Maximal degree in co-relation 24415. Up to 2772 conditions per place. [2024-06-20 15:28:03,345 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 296 selfloop transitions, 39 changer transitions 0/391 dead transitions. [2024-06-20 15:28:03,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 391 transitions, 6793 flow [2024-06-20 15:28:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:28:03,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:28:03,346 INFO L175 Difference]: Start difference. First operand has 267 places, 370 transitions, 6023 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:28:03,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 391 transitions, 6793 flow [2024-06-20 15:28:04,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 391 transitions, 6715 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:04,093 INFO L231 Difference]: Finished difference. Result has 269 places, 371 transitions, 6053 flow [2024-06-20 15:28:04,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6053, PETRI_PLACES=269, PETRI_TRANSITIONS=371} [2024-06-20 15:28:04,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-20 15:28:04,093 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 371 transitions, 6053 flow [2024-06-20 15:28:04,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:04,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:04,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:04,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:28:04,094 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:04,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash -117245622, now seen corresponding path program 1 times [2024-06-20 15:28:04,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:04,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252354672] [2024-06-20 15:28:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:04,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:04,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252354672] [2024-06-20 15:28:04,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252354672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:04,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:04,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:04,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424823873] [2024-06-20 15:28:04,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:04,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:04,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:04,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:04,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:28:04,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 371 transitions, 6053 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:04,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:04,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:28:04,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:04,745 INFO L124 PetriNetUnfolderBase]: 2030/3522 cut-off events. [2024-06-20 15:28:04,746 INFO L125 PetriNetUnfolderBase]: For 266165/266181 co-relation queries the response was YES. [2024-06-20 15:28:04,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25597 conditions, 3522 events. 2030/3522 cut-off events. For 266165/266181 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22517 event pairs, 381 based on Foata normal form. 12/3525 useless extension candidates. Maximal degree in co-relation 25472. Up to 2908 conditions per place. [2024-06-20 15:28:04,784 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 314 selfloop transitions, 38 changer transitions 0/397 dead transitions. [2024-06-20 15:28:04,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 397 transitions, 7009 flow [2024-06-20 15:28:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:28:04,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 15:28:04,785 INFO L175 Difference]: Start difference. First operand has 269 places, 371 transitions, 6053 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:28:04,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 397 transitions, 7009 flow [2024-06-20 15:28:05,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 397 transitions, 6925 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:05,554 INFO L231 Difference]: Finished difference. Result has 271 places, 373 transitions, 6073 flow [2024-06-20 15:28:05,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5971, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6073, PETRI_PLACES=271, PETRI_TRANSITIONS=373} [2024-06-20 15:28:05,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-20 15:28:05,555 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 373 transitions, 6073 flow [2024-06-20 15:28:05,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:05,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:05,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:05,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:28:05,556 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:05,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1922731878, now seen corresponding path program 2 times [2024-06-20 15:28:05,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:05,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514050294] [2024-06-20 15:28:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:05,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:05,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:05,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514050294] [2024-06-20 15:28:05,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514050294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:05,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:05,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:05,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034713464] [2024-06-20 15:28:05,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:05,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:05,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:05,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:28:05,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 373 transitions, 6073 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:05,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:05,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:28:05,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:06,231 INFO L124 PetriNetUnfolderBase]: 2064/3571 cut-off events. [2024-06-20 15:28:06,231 INFO L125 PetriNetUnfolderBase]: For 270340/270356 co-relation queries the response was YES. [2024-06-20 15:28:06,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25794 conditions, 3571 events. 2064/3571 cut-off events. For 270340/270356 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22846 event pairs, 411 based on Foata normal form. 14/3576 useless extension candidates. Maximal degree in co-relation 25668. Up to 3035 conditions per place. [2024-06-20 15:28:06,273 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 310 selfloop transitions, 36 changer transitions 0/391 dead transitions. [2024-06-20 15:28:06,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 391 transitions, 6845 flow [2024-06-20 15:28:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:28:06,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 15:28:06,274 INFO L175 Difference]: Start difference. First operand has 271 places, 373 transitions, 6073 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:28:06,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 391 transitions, 6845 flow [2024-06-20 15:28:07,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 391 transitions, 6802 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:07,016 INFO L231 Difference]: Finished difference. Result has 275 places, 374 transitions, 6122 flow [2024-06-20 15:28:07,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6122, PETRI_PLACES=275, PETRI_TRANSITIONS=374} [2024-06-20 15:28:07,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-20 15:28:07,016 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 374 transitions, 6122 flow [2024-06-20 15:28:07,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:07,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:07,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:07,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:28:07,017 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:07,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:07,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1671903398, now seen corresponding path program 3 times [2024-06-20 15:28:07,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:07,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136691940] [2024-06-20 15:28:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:07,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:07,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:07,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136691940] [2024-06-20 15:28:07,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136691940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:07,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:07,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:07,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911651133] [2024-06-20 15:28:07,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:07,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:07,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:07,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:07,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:07,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:28:07,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 374 transitions, 6122 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:07,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:07,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:28:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:07,730 INFO L124 PetriNetUnfolderBase]: 2097/3619 cut-off events. [2024-06-20 15:28:07,730 INFO L125 PetriNetUnfolderBase]: For 277553/277563 co-relation queries the response was YES. [2024-06-20 15:28:07,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26280 conditions, 3619 events. 2097/3619 cut-off events. For 277553/277563 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23092 event pairs, 415 based on Foata normal form. 10/3618 useless extension candidates. Maximal degree in co-relation 26152. Up to 3087 conditions per place. [2024-06-20 15:28:07,771 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 309 selfloop transitions, 39 changer transitions 0/393 dead transitions. [2024-06-20 15:28:07,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 393 transitions, 6902 flow [2024-06-20 15:28:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:07,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:28:07,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:28:07,772 INFO L175 Difference]: Start difference. First operand has 275 places, 374 transitions, 6122 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:28:07,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 393 transitions, 6902 flow [2024-06-20 15:28:08,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 393 transitions, 6830 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:08,340 INFO L231 Difference]: Finished difference. Result has 278 places, 375 transitions, 6150 flow [2024-06-20 15:28:08,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6150, PETRI_PLACES=278, PETRI_TRANSITIONS=375} [2024-06-20 15:28:08,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-20 15:28:08,341 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 375 transitions, 6150 flow [2024-06-20 15:28:08,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:08,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:08,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:08,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:28:08,341 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:08,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:08,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1087206, now seen corresponding path program 1 times [2024-06-20 15:28:08,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:08,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75661024] [2024-06-20 15:28:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:08,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:08,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:08,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75661024] [2024-06-20 15:28:08,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75661024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:08,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:08,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:08,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743237452] [2024-06-20 15:28:08,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:08,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:08,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:08,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:08,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:08,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:08,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 375 transitions, 6150 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:08,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:08,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:08,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:08,993 INFO L124 PetriNetUnfolderBase]: 2207/3734 cut-off events. [2024-06-20 15:28:08,993 INFO L125 PetriNetUnfolderBase]: For 266267/266277 co-relation queries the response was YES. [2024-06-20 15:28:09,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27106 conditions, 3734 events. 2207/3734 cut-off events. For 266267/266277 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23365 event pairs, 439 based on Foata normal form. 2/3730 useless extension candidates. Maximal degree in co-relation 26977. Up to 3351 conditions per place. [2024-06-20 15:28:09,035 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 343 selfloop transitions, 41 changer transitions 0/392 dead transitions. [2024-06-20 15:28:09,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 392 transitions, 7006 flow [2024-06-20 15:28:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:28:09,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-20 15:28:09,036 INFO L175 Difference]: Start difference. First operand has 278 places, 375 transitions, 6150 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:28:09,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 392 transitions, 7006 flow [2024-06-20 15:28:09,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 392 transitions, 6926 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:09,737 INFO L231 Difference]: Finished difference. Result has 280 places, 377 transitions, 6207 flow [2024-06-20 15:28:09,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6207, PETRI_PLACES=280, PETRI_TRANSITIONS=377} [2024-06-20 15:28:09,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-20 15:28:09,738 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 377 transitions, 6207 flow [2024-06-20 15:28:09,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:09,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:09,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:09,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:28:09,738 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:09,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:09,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1568018906, now seen corresponding path program 4 times [2024-06-20 15:28:09,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:09,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495536855] [2024-06-20 15:28:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:09,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:09,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495536855] [2024-06-20 15:28:09,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495536855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:09,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:09,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:09,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962966362] [2024-06-20 15:28:09,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:09,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:09,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:09,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:09,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:09,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:28:09,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 377 transitions, 6207 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:09,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:09,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:28:09,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:10,441 INFO L124 PetriNetUnfolderBase]: 2082/3609 cut-off events. [2024-06-20 15:28:10,442 INFO L125 PetriNetUnfolderBase]: For 267144/267154 co-relation queries the response was YES. [2024-06-20 15:28:10,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25759 conditions, 3609 events. 2082/3609 cut-off events. For 267144/267154 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23123 event pairs, 371 based on Foata normal form. 10/3614 useless extension candidates. Maximal degree in co-relation 25629. Up to 3061 conditions per place. [2024-06-20 15:28:10,482 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 328 selfloop transitions, 27 changer transitions 0/400 dead transitions. [2024-06-20 15:28:10,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 400 transitions, 7005 flow [2024-06-20 15:28:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:28:10,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-20 15:28:10,483 INFO L175 Difference]: Start difference. First operand has 280 places, 377 transitions, 6207 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:28:10,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 400 transitions, 7005 flow [2024-06-20 15:28:11,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 400 transitions, 6882 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:11,255 INFO L231 Difference]: Finished difference. Result has 281 places, 377 transitions, 6147 flow [2024-06-20 15:28:11,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6147, PETRI_PLACES=281, PETRI_TRANSITIONS=377} [2024-06-20 15:28:11,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-20 15:28:11,256 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 377 transitions, 6147 flow [2024-06-20 15:28:11,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:11,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:11,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:11,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:28:11,256 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:11,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:11,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1561578098, now seen corresponding path program 2 times [2024-06-20 15:28:11,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:11,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360015579] [2024-06-20 15:28:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:11,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:11,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:11,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360015579] [2024-06-20 15:28:11,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360015579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:11,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:11,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:11,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697460640] [2024-06-20 15:28:11,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:11,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:11,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:11,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:11,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 377 transitions, 6147 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:11,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:11,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:11,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:11,946 INFO L124 PetriNetUnfolderBase]: 2192/3720 cut-off events. [2024-06-20 15:28:11,947 INFO L125 PetriNetUnfolderBase]: For 254342/254352 co-relation queries the response was YES. [2024-06-20 15:28:11,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26483 conditions, 3720 events. 2192/3720 cut-off events. For 254342/254352 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23277 event pairs, 424 based on Foata normal form. 2/3720 useless extension candidates. Maximal degree in co-relation 26352. Up to 3350 conditions per place. [2024-06-20 15:28:11,989 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 362 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2024-06-20 15:28:11,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 396 transitions, 7023 flow [2024-06-20 15:28:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:28:11,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-20 15:28:11,990 INFO L175 Difference]: Start difference. First operand has 281 places, 377 transitions, 6147 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:28:11,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 396 transitions, 7023 flow [2024-06-20 15:28:12,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 396 transitions, 6957 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:12,745 INFO L231 Difference]: Finished difference. Result has 282 places, 379 transitions, 6192 flow [2024-06-20 15:28:12,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6192, PETRI_PLACES=282, PETRI_TRANSITIONS=379} [2024-06-20 15:28:12,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-20 15:28:12,745 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 379 transitions, 6192 flow [2024-06-20 15:28:12,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:12,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:12,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:12,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:28:12,746 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:12,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1331362178, now seen corresponding path program 3 times [2024-06-20 15:28:12,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:12,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358282430] [2024-06-20 15:28:12,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:12,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:12,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:12,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358282430] [2024-06-20 15:28:12,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358282430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:12,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:12,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:12,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104769571] [2024-06-20 15:28:12,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:12,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:12,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:12,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:12,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:12,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:12,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 379 transitions, 6192 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:12,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:12,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:12,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:13,443 INFO L124 PetriNetUnfolderBase]: 2220/3771 cut-off events. [2024-06-20 15:28:13,443 INFO L125 PetriNetUnfolderBase]: For 269873/269883 co-relation queries the response was YES. [2024-06-20 15:28:13,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27057 conditions, 3771 events. 2220/3771 cut-off events. For 269873/269883 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23650 event pairs, 398 based on Foata normal form. 2/3771 useless extension candidates. Maximal degree in co-relation 26925. Up to 3279 conditions per place. [2024-06-20 15:28:13,486 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 367 selfloop transitions, 30 changer transitions 0/405 dead transitions. [2024-06-20 15:28:13,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 405 transitions, 7292 flow [2024-06-20 15:28:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:28:13,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:28:13,487 INFO L175 Difference]: Start difference. First operand has 282 places, 379 transitions, 6192 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:28:13,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 405 transitions, 7292 flow [2024-06-20 15:28:14,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 405 transitions, 7197 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:14,146 INFO L231 Difference]: Finished difference. Result has 284 places, 382 transitions, 6236 flow [2024-06-20 15:28:14,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6097, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6236, PETRI_PLACES=284, PETRI_TRANSITIONS=382} [2024-06-20 15:28:14,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-20 15:28:14,147 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 382 transitions, 6236 flow [2024-06-20 15:28:14,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:14,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:14,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:14,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:28:14,148 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:14,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1597816188, now seen corresponding path program 1 times [2024-06-20 15:28:14,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:14,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488628960] [2024-06-20 15:28:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:14,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:14,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488628960] [2024-06-20 15:28:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488628960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:14,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:14,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:14,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971657518] [2024-06-20 15:28:14,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:14,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:14,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:14,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:14,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 382 transitions, 6236 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:14,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:14,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:14,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:14,882 INFO L124 PetriNetUnfolderBase]: 2233/3785 cut-off events. [2024-06-20 15:28:14,883 INFO L125 PetriNetUnfolderBase]: For 276258/276258 co-relation queries the response was YES. [2024-06-20 15:28:14,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27385 conditions, 3785 events. 2233/3785 cut-off events. For 276258/276258 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23713 event pairs, 416 based on Foata normal form. 1/3784 useless extension candidates. Maximal degree in co-relation 27252. Up to 3326 conditions per place. [2024-06-20 15:28:14,927 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 54 changer transitions 0/422 dead transitions. [2024-06-20 15:28:14,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 422 transitions, 7426 flow [2024-06-20 15:28:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:28:14,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:28:14,928 INFO L175 Difference]: Start difference. First operand has 284 places, 382 transitions, 6236 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:28:14,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 422 transitions, 7426 flow [2024-06-20 15:28:15,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 422 transitions, 7352 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:15,948 INFO L231 Difference]: Finished difference. Result has 291 places, 388 transitions, 6405 flow [2024-06-20 15:28:15,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6405, PETRI_PLACES=291, PETRI_TRANSITIONS=388} [2024-06-20 15:28:15,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-20 15:28:15,948 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 388 transitions, 6405 flow [2024-06-20 15:28:15,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:15,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:15,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:15,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:28:15,949 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:15,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:15,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1592752892, now seen corresponding path program 2 times [2024-06-20 15:28:15,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:15,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692986763] [2024-06-20 15:28:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:15,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:16,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:16,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692986763] [2024-06-20 15:28:16,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692986763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:16,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:16,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:16,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232407938] [2024-06-20 15:28:16,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:16,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:16,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:16,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:16,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:16,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 388 transitions, 6405 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:16,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:16,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:16,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:16,659 INFO L124 PetriNetUnfolderBase]: 2246/3802 cut-off events. [2024-06-20 15:28:16,659 INFO L125 PetriNetUnfolderBase]: For 291080/291096 co-relation queries the response was YES. [2024-06-20 15:28:16,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28270 conditions, 3802 events. 2246/3802 cut-off events. For 291080/291096 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23839 event pairs, 436 based on Foata normal form. 2/3798 useless extension candidates. Maximal degree in co-relation 28134. Up to 3007 conditions per place. [2024-06-20 15:28:16,707 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 142 changer transitions 0/423 dead transitions. [2024-06-20 15:28:16,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 423 transitions, 7833 flow [2024-06-20 15:28:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:28:16,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:28:16,709 INFO L175 Difference]: Start difference. First operand has 291 places, 388 transitions, 6405 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:28:16,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 423 transitions, 7833 flow [2024-06-20 15:28:17,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 423 transitions, 7733 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:17,377 INFO L231 Difference]: Finished difference. Result has 297 places, 397 transitions, 6909 flow [2024-06-20 15:28:17,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6909, PETRI_PLACES=297, PETRI_TRANSITIONS=397} [2024-06-20 15:28:17,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-20 15:28:17,378 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 397 transitions, 6909 flow [2024-06-20 15:28:17,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:17,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:17,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:17,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:28:17,378 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:17,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:17,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1628761908, now seen corresponding path program 3 times [2024-06-20 15:28:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:17,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547030997] [2024-06-20 15:28:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:17,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:17,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547030997] [2024-06-20 15:28:17,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547030997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:17,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:17,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:17,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4413171] [2024-06-20 15:28:17,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:17,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:17,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:17,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:17,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:17,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:17,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 397 transitions, 6909 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:17,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:17,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:17,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:18,119 INFO L124 PetriNetUnfolderBase]: 2251/3809 cut-off events. [2024-06-20 15:28:18,119 INFO L125 PetriNetUnfolderBase]: For 303706/303722 co-relation queries the response was YES. [2024-06-20 15:28:18,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29532 conditions, 3809 events. 2251/3809 cut-off events. For 303706/303722 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23844 event pairs, 436 based on Foata normal form. 2/3805 useless extension candidates. Maximal degree in co-relation 29392. Up to 3011 conditions per place. [2024-06-20 15:28:18,159 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 270 selfloop transitions, 145 changer transitions 0/423 dead transitions. [2024-06-20 15:28:18,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 423 transitions, 8231 flow [2024-06-20 15:28:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:28:18,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:28:18,160 INFO L175 Difference]: Start difference. First operand has 297 places, 397 transitions, 6909 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:28:18,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 423 transitions, 8231 flow [2024-06-20 15:28:18,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 423 transitions, 8055 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:18,983 INFO L231 Difference]: Finished difference. Result has 302 places, 400 transitions, 7109 flow [2024-06-20 15:28:18,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7109, PETRI_PLACES=302, PETRI_TRANSITIONS=400} [2024-06-20 15:28:18,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-20 15:28:18,984 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 400 transitions, 7109 flow [2024-06-20 15:28:18,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:18,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:18,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:18,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:28:18,984 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:18,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:18,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1470095564, now seen corresponding path program 4 times [2024-06-20 15:28:18,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:18,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782985792] [2024-06-20 15:28:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:19,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:19,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782985792] [2024-06-20 15:28:19,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782985792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:19,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:19,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:19,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831053946] [2024-06-20 15:28:19,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:19,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:19,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:19,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:19,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:19,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:19,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 400 transitions, 7109 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:19,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:19,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:19,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:19,761 INFO L124 PetriNetUnfolderBase]: 2264/3836 cut-off events. [2024-06-20 15:28:19,761 INFO L125 PetriNetUnfolderBase]: For 309801/309803 co-relation queries the response was YES. [2024-06-20 15:28:19,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29819 conditions, 3836 events. 2264/3836 cut-off events. For 309801/309803 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24089 event pairs, 417 based on Foata normal form. 1/3835 useless extension candidates. Maximal degree in co-relation 29677. Up to 3413 conditions per place. [2024-06-20 15:28:19,817 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 41 changer transitions 0/425 dead transitions. [2024-06-20 15:28:19,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 425 transitions, 8266 flow [2024-06-20 15:28:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:28:19,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-20 15:28:19,818 INFO L175 Difference]: Start difference. First operand has 302 places, 400 transitions, 7109 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:28:19,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 425 transitions, 8266 flow [2024-06-20 15:28:20,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 425 transitions, 7968 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:20,971 INFO L231 Difference]: Finished difference. Result has 307 places, 406 transitions, 7037 flow [2024-06-20 15:28:20,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6820, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7037, PETRI_PLACES=307, PETRI_TRANSITIONS=406} [2024-06-20 15:28:20,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 15:28:20,972 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 406 transitions, 7037 flow [2024-06-20 15:28:20,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:20,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:20,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:20,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:28:20,972 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:20,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:20,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1420350209, now seen corresponding path program 1 times [2024-06-20 15:28:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:20,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979716106] [2024-06-20 15:28:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:20,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:21,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:21,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979716106] [2024-06-20 15:28:21,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979716106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:21,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:21,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:21,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057722869] [2024-06-20 15:28:21,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:21,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:21,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:21,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:21,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 406 transitions, 7037 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:21,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:21,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:21,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:21,708 INFO L124 PetriNetUnfolderBase]: 2293/3889 cut-off events. [2024-06-20 15:28:21,708 INFO L125 PetriNetUnfolderBase]: For 327556/327562 co-relation queries the response was YES. [2024-06-20 15:28:21,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30201 conditions, 3889 events. 2293/3889 cut-off events. For 327556/327562 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 24525 event pairs, 448 based on Foata normal form. 2/3887 useless extension candidates. Maximal degree in co-relation 30057. Up to 3220 conditions per place. [2024-06-20 15:28:21,757 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 287 selfloop transitions, 147 changer transitions 0/442 dead transitions. [2024-06-20 15:28:21,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 442 transitions, 8501 flow [2024-06-20 15:28:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:28:21,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:28:21,758 INFO L175 Difference]: Start difference. First operand has 307 places, 406 transitions, 7037 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:28:21,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 442 transitions, 8501 flow [2024-06-20 15:28:23,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 442 transitions, 8384 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:23,036 INFO L231 Difference]: Finished difference. Result has 309 places, 418 transitions, 7430 flow [2024-06-20 15:28:23,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6920, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7430, PETRI_PLACES=309, PETRI_TRANSITIONS=418} [2024-06-20 15:28:23,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-20 15:28:23,036 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 418 transitions, 7430 flow [2024-06-20 15:28:23,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:23,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:23,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:23,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:28:23,037 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:23,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1628769007, now seen corresponding path program 2 times [2024-06-20 15:28:23,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:23,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146765129] [2024-06-20 15:28:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:23,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:23,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:23,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146765129] [2024-06-20 15:28:23,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146765129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:23,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:23,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:23,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112930763] [2024-06-20 15:28:23,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:23,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:23,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:23,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:23,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:23,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 418 transitions, 7430 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:23,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:23,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:23,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:23,820 INFO L124 PetriNetUnfolderBase]: 2306/3904 cut-off events. [2024-06-20 15:28:23,820 INFO L125 PetriNetUnfolderBase]: For 339236/339244 co-relation queries the response was YES. [2024-06-20 15:28:23,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30773 conditions, 3904 events. 2306/3904 cut-off events. For 339236/339244 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24630 event pairs, 445 based on Foata normal form. 2/3901 useless extension candidates. Maximal degree in co-relation 30628. Up to 3235 conditions per place. [2024-06-20 15:28:23,870 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 293 selfloop transitions, 148 changer transitions 0/449 dead transitions. [2024-06-20 15:28:23,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 449 transitions, 8818 flow [2024-06-20 15:28:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:28:23,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-20 15:28:23,871 INFO L175 Difference]: Start difference. First operand has 309 places, 418 transitions, 7430 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:28:23,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 449 transitions, 8818 flow [2024-06-20 15:28:24,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 449 transitions, 8628 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:24,979 INFO L231 Difference]: Finished difference. Result has 314 places, 424 transitions, 7656 flow [2024-06-20 15:28:24,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7656, PETRI_PLACES=314, PETRI_TRANSITIONS=424} [2024-06-20 15:28:24,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 15:28:24,980 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 424 transitions, 7656 flow [2024-06-20 15:28:24,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:24,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:24,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:24,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:28:24,980 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:24,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:24,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1932936101, now seen corresponding path program 3 times [2024-06-20 15:28:24,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:24,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413168190] [2024-06-20 15:28:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:24,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:25,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:25,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413168190] [2024-06-20 15:28:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413168190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:25,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:25,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687543818] [2024-06-20 15:28:25,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:25,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:25,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:25,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:25,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 424 transitions, 7656 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:25,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:25,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:25,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:25,787 INFO L124 PetriNetUnfolderBase]: 2303/3904 cut-off events. [2024-06-20 15:28:25,787 INFO L125 PetriNetUnfolderBase]: For 345699/345707 co-relation queries the response was YES. [2024-06-20 15:28:25,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30807 conditions, 3904 events. 2303/3904 cut-off events. For 345699/345707 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24620 event pairs, 447 based on Foata normal form. 2/3901 useless extension candidates. Maximal degree in co-relation 30661. Up to 3232 conditions per place. [2024-06-20 15:28:25,839 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 293 selfloop transitions, 149 changer transitions 0/450 dead transitions. [2024-06-20 15:28:25,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 450 transitions, 8780 flow [2024-06-20 15:28:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:28:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:28:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:28:25,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-20 15:28:25,840 INFO L175 Difference]: Start difference. First operand has 314 places, 424 transitions, 7656 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:28:25,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 450 transitions, 8780 flow [2024-06-20 15:28:26,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 450 transitions, 8434 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:26,852 INFO L231 Difference]: Finished difference. Result has 319 places, 424 transitions, 7614 flow [2024-06-20 15:28:26,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7614, PETRI_PLACES=319, PETRI_TRANSITIONS=424} [2024-06-20 15:28:26,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-20 15:28:26,853 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 424 transitions, 7614 flow [2024-06-20 15:28:26,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:26,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:26,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:26,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:28:26,853 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:26,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1181182863, now seen corresponding path program 4 times [2024-06-20 15:28:26,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:26,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712525886] [2024-06-20 15:28:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:26,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:26,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:26,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712525886] [2024-06-20 15:28:26,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712525886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:26,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:26,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:26,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300017629] [2024-06-20 15:28:26,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:26,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:26,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:26,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:26,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:26,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 424 transitions, 7614 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:26,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:26,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:26,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:27,645 INFO L124 PetriNetUnfolderBase]: 2313/3924 cut-off events. [2024-06-20 15:28:27,646 INFO L125 PetriNetUnfolderBase]: For 353441/353443 co-relation queries the response was YES. [2024-06-20 15:28:27,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30980 conditions, 3924 events. 2313/3924 cut-off events. For 353441/353443 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24793 event pairs, 419 based on Foata normal form. 2/3924 useless extension candidates. Maximal degree in co-relation 30833. Up to 3435 conditions per place. [2024-06-20 15:28:27,695 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 372 selfloop transitions, 71 changer transitions 0/451 dead transitions. [2024-06-20 15:28:27,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 451 transitions, 8870 flow [2024-06-20 15:28:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:28:27,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:28:27,696 INFO L175 Difference]: Start difference. First operand has 319 places, 424 transitions, 7614 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:28:27,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 451 transitions, 8870 flow [2024-06-20 15:28:28,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 451 transitions, 8663 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:28:28,855 INFO L231 Difference]: Finished difference. Result has 319 places, 430 transitions, 7667 flow [2024-06-20 15:28:28,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7412, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7667, PETRI_PLACES=319, PETRI_TRANSITIONS=430} [2024-06-20 15:28:28,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-20 15:28:28,855 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 430 transitions, 7667 flow [2024-06-20 15:28:28,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:28,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:28,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:28,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:28:28,855 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:28,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1470082885, now seen corresponding path program 5 times [2024-06-20 15:28:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:28,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306346179] [2024-06-20 15:28:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:28,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:28,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306346179] [2024-06-20 15:28:28,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306346179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:28,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:28,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:28,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103503348] [2024-06-20 15:28:28,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:28,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:28,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:28,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:28,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:28,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:28,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 430 transitions, 7667 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:28,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:28,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:28,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:29,668 INFO L124 PetriNetUnfolderBase]: 2307/3916 cut-off events. [2024-06-20 15:28:29,669 INFO L125 PetriNetUnfolderBase]: For 354846/354848 co-relation queries the response was YES. [2024-06-20 15:28:29,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30701 conditions, 3916 events. 2307/3916 cut-off events. For 354846/354848 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24745 event pairs, 419 based on Foata normal form. 2/3916 useless extension candidates. Maximal degree in co-relation 30553. Up to 3429 conditions per place. [2024-06-20 15:28:29,719 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 370 selfloop transitions, 73 changer transitions 0/451 dead transitions. [2024-06-20 15:28:29,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 451 transitions, 8655 flow [2024-06-20 15:28:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:28:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:28:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-20 15:28:29,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-20 15:28:29,720 INFO L175 Difference]: Start difference. First operand has 319 places, 430 transitions, 7667 flow. Second operand 9 states and 210 transitions. [2024-06-20 15:28:29,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 451 transitions, 8655 flow [2024-06-20 15:28:31,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 451 transitions, 8493 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:31,363 INFO L231 Difference]: Finished difference. Result has 322 places, 430 transitions, 7663 flow [2024-06-20 15:28:31,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7505, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7663, PETRI_PLACES=322, PETRI_TRANSITIONS=430} [2024-06-20 15:28:31,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-20 15:28:31,364 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 430 transitions, 7663 flow [2024-06-20 15:28:31,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:31,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:31,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:31,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:28:31,364 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:31,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash 996482768, now seen corresponding path program 5 times [2024-06-20 15:28:31,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:31,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939811535] [2024-06-20 15:28:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:31,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:31,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:31,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939811535] [2024-06-20 15:28:31,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939811535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:31,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:31,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:31,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870569977] [2024-06-20 15:28:31,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:31,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:31,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:31,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:31,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:31,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:31,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 430 transitions, 7663 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:31,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:31,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:31,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:32,137 INFO L124 PetriNetUnfolderBase]: 2312/3901 cut-off events. [2024-06-20 15:28:32,138 INFO L125 PetriNetUnfolderBase]: For 363483/363483 co-relation queries the response was YES. [2024-06-20 15:28:32,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30860 conditions, 3901 events. 2312/3901 cut-off events. For 363483/363483 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24530 event pairs, 479 based on Foata normal form. 1/3861 useless extension candidates. Maximal degree in co-relation 30711. Up to 3088 conditions per place. [2024-06-20 15:28:32,190 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 289 selfloop transitions, 163 changer transitions 0/460 dead transitions. [2024-06-20 15:28:32,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 460 transitions, 9303 flow [2024-06-20 15:28:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:28:32,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:28:32,191 INFO L175 Difference]: Start difference. First operand has 322 places, 430 transitions, 7663 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:28:32,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 460 transitions, 9303 flow [2024-06-20 15:28:33,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 460 transitions, 9127 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 15:28:33,436 INFO L231 Difference]: Finished difference. Result has 320 places, 436 transitions, 7990 flow [2024-06-20 15:28:33,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7487, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7990, PETRI_PLACES=320, PETRI_TRANSITIONS=436} [2024-06-20 15:28:33,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 15:28:33,437 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 436 transitions, 7990 flow [2024-06-20 15:28:33,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:33,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:33,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:33,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:28:33,437 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:33,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:33,437 INFO L85 PathProgramCache]: Analyzing trace with hash -941709516, now seen corresponding path program 6 times [2024-06-20 15:28:33,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:33,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382075187] [2024-06-20 15:28:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:33,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:33,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:33,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382075187] [2024-06-20 15:28:33,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382075187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:33,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:33,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:33,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339550505] [2024-06-20 15:28:33,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:33,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:33,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:33,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:33,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:33,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:33,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 436 transitions, 7990 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:33,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:33,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:33,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:34,304 INFO L124 PetriNetUnfolderBase]: 2317/3906 cut-off events. [2024-06-20 15:28:34,304 INFO L125 PetriNetUnfolderBase]: For 374331/374331 co-relation queries the response was YES. [2024-06-20 15:28:34,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31385 conditions, 3906 events. 2317/3906 cut-off events. For 374331/374331 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24566 event pairs, 477 based on Foata normal form. 1/3866 useless extension candidates. Maximal degree in co-relation 31235. Up to 3092 conditions per place. [2024-06-20 15:28:34,359 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 288 selfloop transitions, 164 changer transitions 0/460 dead transitions. [2024-06-20 15:28:34,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 460 transitions, 9546 flow [2024-06-20 15:28:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:28:34,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:28:34,360 INFO L175 Difference]: Start difference. First operand has 320 places, 436 transitions, 7990 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:28:34,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 460 transitions, 9546 flow [2024-06-20 15:28:35,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 460 transitions, 9319 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:35,470 INFO L231 Difference]: Finished difference. Result has 324 places, 439 transitions, 8187 flow [2024-06-20 15:28:35,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8187, PETRI_PLACES=324, PETRI_TRANSITIONS=439} [2024-06-20 15:28:35,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-20 15:28:35,471 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 439 transitions, 8187 flow [2024-06-20 15:28:35,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:35,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:35,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:35,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:28:35,471 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:35,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash -597623466, now seen corresponding path program 7 times [2024-06-20 15:28:35,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:35,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722689320] [2024-06-20 15:28:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:35,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:35,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:35,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722689320] [2024-06-20 15:28:35,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722689320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:35,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:35,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:35,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196525202] [2024-06-20 15:28:35,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:35,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:35,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:35,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:35,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:35,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 439 transitions, 8187 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:35,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:35,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:35,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:36,264 INFO L124 PetriNetUnfolderBase]: 2322/3915 cut-off events. [2024-06-20 15:28:36,264 INFO L125 PetriNetUnfolderBase]: For 383421/383421 co-relation queries the response was YES. [2024-06-20 15:28:36,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31767 conditions, 3915 events. 2322/3915 cut-off events. For 383421/383421 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24694 event pairs, 477 based on Foata normal form. 1/3875 useless extension candidates. Maximal degree in co-relation 31615. Up to 3096 conditions per place. [2024-06-20 15:28:36,318 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 279 selfloop transitions, 172 changer transitions 0/459 dead transitions. [2024-06-20 15:28:36,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 459 transitions, 9539 flow [2024-06-20 15:28:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:28:36,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:28:36,319 INFO L175 Difference]: Start difference. First operand has 324 places, 439 transitions, 8187 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:28:36,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 459 transitions, 9539 flow [2024-06-20 15:28:37,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 459 transitions, 9192 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:37,629 INFO L231 Difference]: Finished difference. Result has 327 places, 442 transitions, 8254 flow [2024-06-20 15:28:37,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8254, PETRI_PLACES=327, PETRI_TRANSITIONS=442} [2024-06-20 15:28:37,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-20 15:28:37,629 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 442 transitions, 8254 flow [2024-06-20 15:28:37,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:37,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:37,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:37,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:28:37,630 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:37,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1205570640, now seen corresponding path program 8 times [2024-06-20 15:28:37,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:37,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750522472] [2024-06-20 15:28:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:37,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:37,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:37,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750522472] [2024-06-20 15:28:37,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750522472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:37,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:37,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:37,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579158454] [2024-06-20 15:28:37,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:37,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:37,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:37,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:37,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:37,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:37,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 442 transitions, 8254 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:37,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:37,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:37,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:38,430 INFO L124 PetriNetUnfolderBase]: 2327/3940 cut-off events. [2024-06-20 15:28:38,430 INFO L125 PetriNetUnfolderBase]: For 388740/388740 co-relation queries the response was YES. [2024-06-20 15:28:38,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31940 conditions, 3940 events. 2327/3940 cut-off events. For 388740/388740 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24939 event pairs, 426 based on Foata normal form. 1/3928 useless extension candidates. Maximal degree in co-relation 31787. Up to 3234 conditions per place. [2024-06-20 15:28:38,483 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 316 selfloop transitions, 148 changer transitions 0/472 dead transitions. [2024-06-20 15:28:38,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 472 transitions, 9679 flow [2024-06-20 15:28:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:28:38,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:28:38,484 INFO L175 Difference]: Start difference. First operand has 327 places, 442 transitions, 8254 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:28:38,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 472 transitions, 9679 flow [2024-06-20 15:28:39,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 472 transitions, 9316 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:39,974 INFO L231 Difference]: Finished difference. Result has 331 places, 445 transitions, 8368 flow [2024-06-20 15:28:39,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7897, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8368, PETRI_PLACES=331, PETRI_TRANSITIONS=445} [2024-06-20 15:28:39,974 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-20 15:28:39,974 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 445 transitions, 8368 flow [2024-06-20 15:28:39,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:39,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:39,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:39,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:28:39,975 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:39,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:39,975 INFO L85 PathProgramCache]: Analyzing trace with hash 811144534, now seen corresponding path program 9 times [2024-06-20 15:28:39,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:39,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851824717] [2024-06-20 15:28:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:39,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:40,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:40,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851824717] [2024-06-20 15:28:40,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851824717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:40,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:40,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:40,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795565892] [2024-06-20 15:28:40,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:40,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:40,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:40,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:40,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 445 transitions, 8368 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:40,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:40,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:40,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:40,799 INFO L124 PetriNetUnfolderBase]: 2324/3948 cut-off events. [2024-06-20 15:28:40,799 INFO L125 PetriNetUnfolderBase]: For 392004/392006 co-relation queries the response was YES. [2024-06-20 15:28:40,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32086 conditions, 3948 events. 2324/3948 cut-off events. For 392004/392006 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25030 event pairs, 416 based on Foata normal form. 1/3947 useless extension candidates. Maximal degree in co-relation 31931. Up to 3232 conditions per place. [2024-06-20 15:28:40,851 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 324 selfloop transitions, 145 changer transitions 0/477 dead transitions. [2024-06-20 15:28:40,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 477 transitions, 9582 flow [2024-06-20 15:28:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:28:40,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:28:40,852 INFO L175 Difference]: Start difference. First operand has 331 places, 445 transitions, 8368 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:28:40,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 477 transitions, 9582 flow [2024-06-20 15:28:42,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 477 transitions, 9248 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:28:42,517 INFO L231 Difference]: Finished difference. Result has 332 places, 445 transitions, 8342 flow [2024-06-20 15:28:42,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8034, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8342, PETRI_PLACES=332, PETRI_TRANSITIONS=445} [2024-06-20 15:28:42,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-20 15:28:42,518 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 445 transitions, 8342 flow [2024-06-20 15:28:42,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:42,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:42,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:42,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:28:42,518 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:42,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1006965387, now seen corresponding path program 6 times [2024-06-20 15:28:42,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:42,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874152999] [2024-06-20 15:28:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:42,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:42,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:42,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874152999] [2024-06-20 15:28:42,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874152999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:42,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:42,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:42,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794351293] [2024-06-20 15:28:42,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:42,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:42,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:42,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:42,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:42,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:42,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 445 transitions, 8342 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:42,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:42,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:42,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:43,364 INFO L124 PetriNetUnfolderBase]: 2337/3956 cut-off events. [2024-06-20 15:28:43,364 INFO L125 PetriNetUnfolderBase]: For 409046/409046 co-relation queries the response was YES. [2024-06-20 15:28:43,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32403 conditions, 3956 events. 2337/3956 cut-off events. For 409046/409046 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25032 event pairs, 475 based on Foata normal form. 1/3937 useless extension candidates. Maximal degree in co-relation 32247. Up to 3277 conditions per place. [2024-06-20 15:28:43,416 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 165 changer transitions 0/474 dead transitions. [2024-06-20 15:28:43,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 474 transitions, 9808 flow [2024-06-20 15:28:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:28:43,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:28:43,417 INFO L175 Difference]: Start difference. First operand has 332 places, 445 transitions, 8342 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:28:43,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 474 transitions, 9808 flow [2024-06-20 15:28:44,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 474 transitions, 9565 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:28:44,767 INFO L231 Difference]: Finished difference. Result has 333 places, 451 transitions, 8549 flow [2024-06-20 15:28:44,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8103, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8549, PETRI_PLACES=333, PETRI_TRANSITIONS=451} [2024-06-20 15:28:44,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-20 15:28:44,767 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 451 transitions, 8549 flow [2024-06-20 15:28:44,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:44,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:44,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:44,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:28:44,768 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:44,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash -941696837, now seen corresponding path program 7 times [2024-06-20 15:28:44,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:44,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368121841] [2024-06-20 15:28:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:44,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368121841] [2024-06-20 15:28:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368121841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:44,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:44,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:44,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686528507] [2024-06-20 15:28:44,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:44,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:44,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:44,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:44,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:44,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:44,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 451 transitions, 8549 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:44,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:44,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:44,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:45,729 INFO L124 PetriNetUnfolderBase]: 2334/3951 cut-off events. [2024-06-20 15:28:45,730 INFO L125 PetriNetUnfolderBase]: For 406309/406309 co-relation queries the response was YES. [2024-06-20 15:28:45,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32298 conditions, 3951 events. 2334/3951 cut-off events. For 406309/406309 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24988 event pairs, 475 based on Foata normal form. 1/3933 useless extension candidates. Maximal degree in co-relation 32141. Up to 3274 conditions per place. [2024-06-20 15:28:45,774 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 166 changer transitions 0/475 dead transitions. [2024-06-20 15:28:45,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 475 transitions, 9735 flow [2024-06-20 15:28:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:28:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:28:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-20 15:28:45,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-20 15:28:45,775 INFO L175 Difference]: Start difference. First operand has 333 places, 451 transitions, 8549 flow. Second operand 10 states and 227 transitions. [2024-06-20 15:28:45,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 475 transitions, 9735 flow [2024-06-20 15:28:47,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 475 transitions, 9355 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:47,564 INFO L231 Difference]: Finished difference. Result has 338 places, 451 transitions, 8507 flow [2024-06-20 15:28:47,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8169, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8507, PETRI_PLACES=338, PETRI_TRANSITIONS=451} [2024-06-20 15:28:47,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-20 15:28:47,565 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 451 transitions, 8507 flow [2024-06-20 15:28:47,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:47,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:47,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:47,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:28:47,565 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:47,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:47,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1556279665, now seen corresponding path program 8 times [2024-06-20 15:28:47,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:47,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319804288] [2024-06-20 15:28:47,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:47,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:47,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319804288] [2024-06-20 15:28:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319804288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:47,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307506080] [2024-06-20 15:28:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:47,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:47,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:47,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:47,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 451 transitions, 8507 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:47,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:47,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:47,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:48,354 INFO L124 PetriNetUnfolderBase]: 2339/3974 cut-off events. [2024-06-20 15:28:48,354 INFO L125 PetriNetUnfolderBase]: For 416345/416351 co-relation queries the response was YES. [2024-06-20 15:28:48,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32430 conditions, 3974 events. 2339/3974 cut-off events. For 416345/416351 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25291 event pairs, 471 based on Foata normal form. 5/3969 useless extension candidates. Maximal degree in co-relation 32272. Up to 3280 conditions per place. [2024-06-20 15:28:48,407 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 307 selfloop transitions, 162 changer transitions 0/477 dead transitions. [2024-06-20 15:28:48,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 477 transitions, 9959 flow [2024-06-20 15:28:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:28:48,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-20 15:28:48,408 INFO L175 Difference]: Start difference. First operand has 338 places, 451 transitions, 8507 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:28:48,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 477 transitions, 9959 flow [2024-06-20 15:28:49,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 477 transitions, 9732 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:28:49,925 INFO L231 Difference]: Finished difference. Result has 338 places, 455 transitions, 8698 flow [2024-06-20 15:28:49,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8284, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8698, PETRI_PLACES=338, PETRI_TRANSITIONS=455} [2024-06-20 15:28:49,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-20 15:28:49,926 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 455 transitions, 8698 flow [2024-06-20 15:28:49,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:49,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:49,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:49,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:28:49,927 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:49,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:49,927 INFO L85 PathProgramCache]: Analyzing trace with hash -525160205, now seen corresponding path program 9 times [2024-06-20 15:28:49,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:49,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985894512] [2024-06-20 15:28:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:49,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:50,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:50,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985894512] [2024-06-20 15:28:50,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985894512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:50,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:50,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:50,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710174509] [2024-06-20 15:28:50,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:50,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:50,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:50,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:50,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:50,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:50,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 455 transitions, 8698 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:50,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:50,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:50,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:50,741 INFO L124 PetriNetUnfolderBase]: 2352/3992 cut-off events. [2024-06-20 15:28:50,741 INFO L125 PetriNetUnfolderBase]: For 431261/431267 co-relation queries the response was YES. [2024-06-20 15:28:50,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32817 conditions, 3992 events. 2352/3992 cut-off events. For 431261/431267 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25388 event pairs, 469 based on Foata normal form. 5/3987 useless extension candidates. Maximal degree in co-relation 32657. Up to 3295 conditions per place. [2024-06-20 15:28:50,795 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 305 selfloop transitions, 167 changer transitions 0/480 dead transitions. [2024-06-20 15:28:50,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 480 transitions, 10192 flow [2024-06-20 15:28:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:28:50,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 15:28:50,798 INFO L175 Difference]: Start difference. First operand has 338 places, 455 transitions, 8698 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:28:50,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 480 transitions, 10192 flow [2024-06-20 15:28:52,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 480 transitions, 9918 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:52,197 INFO L231 Difference]: Finished difference. Result has 343 places, 461 transitions, 8896 flow [2024-06-20 15:28:52,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8434, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8896, PETRI_PLACES=343, PETRI_TRANSITIONS=461} [2024-06-20 15:28:52,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-20 15:28:52,198 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 461 transitions, 8896 flow [2024-06-20 15:28:52,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:52,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:52,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:52,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:28:52,198 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:52,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:52,198 INFO L85 PathProgramCache]: Analyzing trace with hash -551457397, now seen corresponding path program 10 times [2024-06-20 15:28:52,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:52,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937379904] [2024-06-20 15:28:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:52,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937379904] [2024-06-20 15:28:52,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937379904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:52,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:52,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:52,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917420548] [2024-06-20 15:28:52,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:52,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:52,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:52,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 461 transitions, 8896 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:52,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:52,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:52,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:53,033 INFO L124 PetriNetUnfolderBase]: 2349/3996 cut-off events. [2024-06-20 15:28:53,033 INFO L125 PetriNetUnfolderBase]: For 435207/435223 co-relation queries the response was YES. [2024-06-20 15:28:53,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32755 conditions, 3996 events. 2349/3996 cut-off events. For 435207/435223 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25488 event pairs, 444 based on Foata normal form. 5/3998 useless extension candidates. Maximal degree in co-relation 32593. Up to 3557 conditions per place. [2024-06-20 15:28:53,088 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 428 selfloop transitions, 39 changer transitions 0/475 dead transitions. [2024-06-20 15:28:53,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 475 transitions, 9870 flow [2024-06-20 15:28:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:28:53,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-20 15:28:53,089 INFO L175 Difference]: Start difference. First operand has 343 places, 461 transitions, 8896 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:28:53,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 475 transitions, 9870 flow [2024-06-20 15:28:55,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 475 transitions, 9594 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:55,278 INFO L231 Difference]: Finished difference. Result has 347 places, 461 transitions, 8704 flow [2024-06-20 15:28:55,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8620, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8704, PETRI_PLACES=347, PETRI_TRANSITIONS=461} [2024-06-20 15:28:55,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-20 15:28:55,279 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 461 transitions, 8704 flow [2024-06-20 15:28:55,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:55,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:55,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:55,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:28:55,279 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:55,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:55,279 INFO L85 PathProgramCache]: Analyzing trace with hash 280822877, now seen corresponding path program 11 times [2024-06-20 15:28:55,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:55,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979461738] [2024-06-20 15:28:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:55,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979461738] [2024-06-20 15:28:55,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979461738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:55,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:55,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:55,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501108977] [2024-06-20 15:28:55,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:55,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:55,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:55,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:55,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:55,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 461 transitions, 8704 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:55,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:55,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:55,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:56,141 INFO L124 PetriNetUnfolderBase]: 2370/4015 cut-off events. [2024-06-20 15:28:56,141 INFO L125 PetriNetUnfolderBase]: For 451604/451604 co-relation queries the response was YES. [2024-06-20 15:28:56,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32966 conditions, 4015 events. 2370/4015 cut-off events. For 451604/451604 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25518 event pairs, 467 based on Foata normal form. 1/4001 useless extension candidates. Maximal degree in co-relation 32803. Up to 3316 conditions per place. [2024-06-20 15:28:56,196 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 188 changer transitions 0/494 dead transitions. [2024-06-20 15:28:56,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 494 transitions, 10480 flow [2024-06-20 15:28:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:28:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:28:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-20 15:28:56,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-20 15:28:56,197 INFO L175 Difference]: Start difference. First operand has 347 places, 461 transitions, 8704 flow. Second operand 11 states and 249 transitions. [2024-06-20 15:28:56,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 494 transitions, 10480 flow [2024-06-20 15:28:57,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 494 transitions, 10377 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:57,885 INFO L231 Difference]: Finished difference. Result has 352 places, 470 transitions, 9169 flow [2024-06-20 15:28:57,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8601, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9169, PETRI_PLACES=352, PETRI_TRANSITIONS=470} [2024-06-20 15:28:57,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-20 15:28:57,886 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 470 transitions, 9169 flow [2024-06-20 15:28:57,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:57,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:57,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:57,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:28:57,886 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:57,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1351051437, now seen corresponding path program 12 times [2024-06-20 15:28:57,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:57,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558949485] [2024-06-20 15:28:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:57,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:57,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:57,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558949485] [2024-06-20 15:28:57,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558949485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:57,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:57,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:57,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161517962] [2024-06-20 15:28:57,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:57,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:57,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:57,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:57,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:58,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:58,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 470 transitions, 9169 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:28:58,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:58,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:58,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:58,811 INFO L124 PetriNetUnfolderBase]: 2367/4015 cut-off events. [2024-06-20 15:28:58,812 INFO L125 PetriNetUnfolderBase]: For 458838/458838 co-relation queries the response was YES. [2024-06-20 15:28:58,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33299 conditions, 4015 events. 2367/4015 cut-off events. For 458838/458838 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25565 event pairs, 469 based on Foata normal form. 1/4001 useless extension candidates. Maximal degree in co-relation 33135. Up to 3313 conditions per place. [2024-06-20 15:28:58,862 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 186 changer transitions 0/493 dead transitions. [2024-06-20 15:28:58,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 493 transitions, 10761 flow [2024-06-20 15:28:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:28:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:28:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:28:58,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-20 15:28:58,863 INFO L175 Difference]: Start difference. First operand has 352 places, 470 transitions, 9169 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:28:58,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 493 transitions, 10761 flow [2024-06-20 15:29:00,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 493 transitions, 10144 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-20 15:29:00,606 INFO L231 Difference]: Finished difference. Result has 354 places, 470 transitions, 8930 flow [2024-06-20 15:29:00,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8552, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8930, PETRI_PLACES=354, PETRI_TRANSITIONS=470} [2024-06-20 15:29:00,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-20 15:29:00,607 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 470 transitions, 8930 flow [2024-06-20 15:29:00,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:00,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:00,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:00,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:29:00,608 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:00,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:00,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1920996335, now seen corresponding path program 13 times [2024-06-20 15:29:00,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:00,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447669917] [2024-06-20 15:29:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:00,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:00,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:00,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447669917] [2024-06-20 15:29:00,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447669917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:00,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:00,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:00,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865177679] [2024-06-20 15:29:00,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:00,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:00,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:00,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:00,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:00,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:00,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 470 transitions, 8930 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:00,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:00,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:00,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:01,456 INFO L124 PetriNetUnfolderBase]: 2364/4009 cut-off events. [2024-06-20 15:29:01,456 INFO L125 PetriNetUnfolderBase]: For 458390/458390 co-relation queries the response was YES. [2024-06-20 15:29:01,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33085 conditions, 4009 events. 2364/4009 cut-off events. For 458390/458390 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25522 event pairs, 469 based on Foata normal form. 1/3995 useless extension candidates. Maximal degree in co-relation 32921. Up to 3310 conditions per place. [2024-06-20 15:29:01,513 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 184 changer transitions 0/491 dead transitions. [2024-06-20 15:29:01,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 491 transitions, 10520 flow [2024-06-20 15:29:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:29:01,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-20 15:29:01,514 INFO L175 Difference]: Start difference. First operand has 354 places, 470 transitions, 8930 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:29:01,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 491 transitions, 10520 flow [2024-06-20 15:29:03,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 491 transitions, 10158 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:03,568 INFO L231 Difference]: Finished difference. Result has 356 places, 470 transitions, 8942 flow [2024-06-20 15:29:03,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8568, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8942, PETRI_PLACES=356, PETRI_TRANSITIONS=470} [2024-06-20 15:29:03,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-20 15:29:03,568 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 470 transitions, 8942 flow [2024-06-20 15:29:03,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:03,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:03,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:03,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:29:03,569 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:03,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:03,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1920983315, now seen corresponding path program 14 times [2024-06-20 15:29:03,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:03,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310751145] [2024-06-20 15:29:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:03,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:03,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:03,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310751145] [2024-06-20 15:29:03,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310751145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:03,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:03,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:03,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407658122] [2024-06-20 15:29:03,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:03,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:03,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 470 transitions, 8942 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:03,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:03,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:03,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:04,559 INFO L124 PetriNetUnfolderBase]: 2374/4035 cut-off events. [2024-06-20 15:29:04,559 INFO L125 PetriNetUnfolderBase]: For 466286/466296 co-relation queries the response was YES. [2024-06-20 15:29:04,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33303 conditions, 4035 events. 2374/4035 cut-off events. For 466286/466296 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25763 event pairs, 444 based on Foata normal form. 1/4032 useless extension candidates. Maximal degree in co-relation 33138. Up to 3591 conditions per place. [2024-06-20 15:29:04,620 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 45 changer transitions 0/491 dead transitions. [2024-06-20 15:29:04,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 491 transitions, 10050 flow [2024-06-20 15:29:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:29:04,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-20 15:29:04,621 INFO L175 Difference]: Start difference. First operand has 356 places, 470 transitions, 8942 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:29:04,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 491 transitions, 10050 flow [2024-06-20 15:29:06,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 491 transitions, 9664 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:29:06,606 INFO L231 Difference]: Finished difference. Result has 357 places, 476 transitions, 8758 flow [2024-06-20 15:29:06,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8568, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8758, PETRI_PLACES=357, PETRI_TRANSITIONS=476} [2024-06-20 15:29:06,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-20 15:29:06,607 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 476 transitions, 8758 flow [2024-06-20 15:29:06,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:06,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:06,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:06,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:29:06,607 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:06,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:06,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1351460637, now seen corresponding path program 15 times [2024-06-20 15:29:06,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:06,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103036144] [2024-06-20 15:29:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:06,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:06,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:06,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103036144] [2024-06-20 15:29:06,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103036144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:06,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:06,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:06,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205227585] [2024-06-20 15:29:06,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:06,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:06,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:06,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:06,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 476 transitions, 8758 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:06,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:06,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:06,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:07,538 INFO L124 PetriNetUnfolderBase]: 2371/4033 cut-off events. [2024-06-20 15:29:07,539 INFO L125 PetriNetUnfolderBase]: For 467032/467042 co-relation queries the response was YES. [2024-06-20 15:29:07,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32930 conditions, 4033 events. 2371/4033 cut-off events. For 467032/467042 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25801 event pairs, 444 based on Foata normal form. 1/4030 useless extension candidates. Maximal degree in co-relation 32764. Up to 3577 conditions per place. [2024-06-20 15:29:07,596 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 431 selfloop transitions, 55 changer transitions 0/494 dead transitions. [2024-06-20 15:29:07,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 494 transitions, 9968 flow [2024-06-20 15:29:07,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:29:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:29:07,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-20 15:29:07,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-20 15:29:07,597 INFO L175 Difference]: Start difference. First operand has 357 places, 476 transitions, 8758 flow. Second operand 10 states and 221 transitions. [2024-06-20 15:29:07,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 494 transitions, 9968 flow [2024-06-20 15:29:09,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 494 transitions, 9860 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:29:09,696 INFO L231 Difference]: Finished difference. Result has 362 places, 476 transitions, 8766 flow [2024-06-20 15:29:09,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8650, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8766, PETRI_PLACES=362, PETRI_TRANSITIONS=476} [2024-06-20 15:29:09,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-20 15:29:09,696 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 476 transitions, 8766 flow [2024-06-20 15:29:09,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:09,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:09,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:09,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:29:09,697 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:09,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:09,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1915188485, now seen corresponding path program 16 times [2024-06-20 15:29:09,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:09,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140905502] [2024-06-20 15:29:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:09,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:09,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:09,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140905502] [2024-06-20 15:29:09,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140905502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:09,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:09,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:09,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789303536] [2024-06-20 15:29:09,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:09,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:09,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:09,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:09,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:09,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:09,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 476 transitions, 8766 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:09,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:09,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:09,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:10,604 INFO L124 PetriNetUnfolderBase]: 2368/4029 cut-off events. [2024-06-20 15:29:10,604 INFO L125 PetriNetUnfolderBase]: For 471047/471057 co-relation queries the response was YES. [2024-06-20 15:29:10,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32903 conditions, 4029 events. 2368/4029 cut-off events. For 471047/471057 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25797 event pairs, 444 based on Foata normal form. 1/4026 useless extension candidates. Maximal degree in co-relation 32736. Up to 3574 conditions per place. [2024-06-20 15:29:10,660 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 432 selfloop transitions, 55 changer transitions 0/495 dead transitions. [2024-06-20 15:29:10,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 495 transitions, 9790 flow [2024-06-20 15:29:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:29:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:29:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-20 15:29:10,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-20 15:29:10,661 INFO L175 Difference]: Start difference. First operand has 362 places, 476 transitions, 8766 flow. Second operand 12 states and 258 transitions. [2024-06-20 15:29:10,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 495 transitions, 9790 flow [2024-06-20 15:29:12,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 495 transitions, 9556 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-20 15:29:12,534 INFO L231 Difference]: Finished difference. Result has 364 places, 476 transitions, 8648 flow [2024-06-20 15:29:12,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8532, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8648, PETRI_PLACES=364, PETRI_TRANSITIONS=476} [2024-06-20 15:29:12,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-20 15:29:12,534 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 476 transitions, 8648 flow [2024-06-20 15:29:12,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:12,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:12,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:12,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:29:12,535 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:12,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:12,535 INFO L85 PathProgramCache]: Analyzing trace with hash 204429931, now seen corresponding path program 17 times [2024-06-20 15:29:12,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:12,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770569408] [2024-06-20 15:29:12,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:12,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:12,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:12,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770569408] [2024-06-20 15:29:12,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770569408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:12,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:12,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638771184] [2024-06-20 15:29:12,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:12,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:12,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:12,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:12,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 476 transitions, 8648 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:12,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:12,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:12,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:13,396 INFO L124 PetriNetUnfolderBase]: 2365/4028 cut-off events. [2024-06-20 15:29:13,396 INFO L125 PetriNetUnfolderBase]: For 471125/471125 co-relation queries the response was YES. [2024-06-20 15:29:13,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32802 conditions, 4028 events. 2365/4028 cut-off events. For 471125/471125 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25766 event pairs, 430 based on Foata normal form. 1/4027 useless extension candidates. Maximal degree in co-relation 32636. Up to 3480 conditions per place. [2024-06-20 15:29:13,451 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 79 changer transitions 0/501 dead transitions. [2024-06-20 15:29:13,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 501 transitions, 9912 flow [2024-06-20 15:29:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:29:13,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:29:13,452 INFO L175 Difference]: Start difference. First operand has 364 places, 476 transitions, 8648 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:29:13,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 501 transitions, 9912 flow [2024-06-20 15:29:15,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 501 transitions, 9759 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-20 15:29:15,367 INFO L231 Difference]: Finished difference. Result has 356 places, 476 transitions, 8677 flow [2024-06-20 15:29:15,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8495, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8677, PETRI_PLACES=356, PETRI_TRANSITIONS=476} [2024-06-20 15:29:15,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-20 15:29:15,367 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 476 transitions, 8677 flow [2024-06-20 15:29:15,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:15,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:15,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:15,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:29:15,368 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:15,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:15,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1965512927, now seen corresponding path program 18 times [2024-06-20 15:29:15,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:15,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106022973] [2024-06-20 15:29:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:15,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:15,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:15,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106022973] [2024-06-20 15:29:15,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106022973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:15,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:15,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:15,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675044454] [2024-06-20 15:29:15,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:15,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:15,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:15,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:15,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 476 transitions, 8677 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:15,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:15,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:15,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:16,229 INFO L124 PetriNetUnfolderBase]: 2375/4043 cut-off events. [2024-06-20 15:29:16,229 INFO L125 PetriNetUnfolderBase]: For 483612/483614 co-relation queries the response was YES. [2024-06-20 15:29:16,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33108 conditions, 4043 events. 2375/4043 cut-off events. For 483612/483614 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25897 event pairs, 419 based on Foata normal form. 2/4043 useless extension candidates. Maximal degree in co-relation 32941. Up to 3302 conditions per place. [2024-06-20 15:29:16,285 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 323 selfloop transitions, 179 changer transitions 0/510 dead transitions. [2024-06-20 15:29:16,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 510 transitions, 10253 flow [2024-06-20 15:29:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:29:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:29:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 15:29:16,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 15:29:16,286 INFO L175 Difference]: Start difference. First operand has 356 places, 476 transitions, 8677 flow. Second operand 9 states and 222 transitions. [2024-06-20 15:29:16,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 510 transitions, 10253 flow [2024-06-20 15:29:18,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 510 transitions, 10162 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:29:18,566 INFO L231 Difference]: Finished difference. Result has 362 places, 482 transitions, 9061 flow [2024-06-20 15:29:18,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8586, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9061, PETRI_PLACES=362, PETRI_TRANSITIONS=482} [2024-06-20 15:29:18,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-20 15:29:18,566 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 482 transitions, 9061 flow [2024-06-20 15:29:18,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:18,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:18,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:29:18,566 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:18,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash 80025565, now seen corresponding path program 19 times [2024-06-20 15:29:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:18,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952588608] [2024-06-20 15:29:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:18,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:18,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952588608] [2024-06-20 15:29:18,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952588608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:18,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:18,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:18,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133059674] [2024-06-20 15:29:18,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:18,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:18,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:18,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:18,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:18,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:18,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 482 transitions, 9061 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:18,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:18,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:18,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:19,438 INFO L124 PetriNetUnfolderBase]: 2369/4036 cut-off events. [2024-06-20 15:29:19,439 INFO L125 PetriNetUnfolderBase]: For 485203/485205 co-relation queries the response was YES. [2024-06-20 15:29:19,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33253 conditions, 4036 events. 2369/4036 cut-off events. For 485203/485205 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25842 event pairs, 418 based on Foata normal form. 2/4036 useless extension candidates. Maximal degree in co-relation 33085. Up to 3296 conditions per place. [2024-06-20 15:29:19,497 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 183 changer transitions 0/513 dead transitions. [2024-06-20 15:29:19,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 513 transitions, 10567 flow [2024-06-20 15:29:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 15:29:19,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-20 15:29:19,498 INFO L175 Difference]: Start difference. First operand has 362 places, 482 transitions, 9061 flow. Second operand 8 states and 206 transitions. [2024-06-20 15:29:19,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 513 transitions, 10567 flow [2024-06-20 15:29:21,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 513 transitions, 10250 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 15:29:21,713 INFO L231 Difference]: Finished difference. Result has 363 places, 482 transitions, 9132 flow [2024-06-20 15:29:21,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8748, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9132, PETRI_PLACES=363, PETRI_TRANSITIONS=482} [2024-06-20 15:29:21,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-20 15:29:21,714 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 482 transitions, 9132 flow [2024-06-20 15:29:21,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:21,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:21,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:21,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:29:21,714 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:21,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1411264625, now seen corresponding path program 20 times [2024-06-20 15:29:21,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:21,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65238803] [2024-06-20 15:29:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:21,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:21,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:21,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65238803] [2024-06-20 15:29:21,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65238803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:21,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:21,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:21,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416567060] [2024-06-20 15:29:21,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:21,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:21,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:21,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:21,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 482 transitions, 9132 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:21,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:21,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:21,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:22,596 INFO L124 PetriNetUnfolderBase]: 2366/4034 cut-off events. [2024-06-20 15:29:22,596 INFO L125 PetriNetUnfolderBase]: For 478814/478814 co-relation queries the response was YES. [2024-06-20 15:29:22,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33182 conditions, 4034 events. 2366/4034 cut-off events. For 478814/478814 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25893 event pairs, 430 based on Foata normal form. 1/4033 useless extension candidates. Maximal degree in co-relation 33014. Up to 3483 conditions per place. [2024-06-20 15:29:22,654 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 82 changer transitions 0/514 dead transitions. [2024-06-20 15:29:22,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 514 transitions, 10252 flow [2024-06-20 15:29:22,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:29:22,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:29:22,655 INFO L175 Difference]: Start difference. First operand has 363 places, 482 transitions, 9132 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:29:22,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 514 transitions, 10252 flow [2024-06-20 15:29:25,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 514 transitions, 9907 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:25,105 INFO L231 Difference]: Finished difference. Result has 365 places, 482 transitions, 8968 flow [2024-06-20 15:29:25,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8787, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8968, PETRI_PLACES=365, PETRI_TRANSITIONS=482} [2024-06-20 15:29:25,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-20 15:29:25,106 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 482 transitions, 8968 flow [2024-06-20 15:29:25,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:25,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:25,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:25,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:29:25,106 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:25,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1364252109, now seen corresponding path program 21 times [2024-06-20 15:29:25,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:25,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870418739] [2024-06-20 15:29:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:25,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:25,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:25,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870418739] [2024-06-20 15:29:25,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870418739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:25,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:25,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275415118] [2024-06-20 15:29:25,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:25,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:25,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:25,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:25,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:25,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 482 transitions, 8968 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:25,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:25,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:25,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:25,931 INFO L124 PetriNetUnfolderBase]: 2363/4022 cut-off events. [2024-06-20 15:29:25,931 INFO L125 PetriNetUnfolderBase]: For 470379/470379 co-relation queries the response was YES. [2024-06-20 15:29:25,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32867 conditions, 4022 events. 2363/4022 cut-off events. For 470379/470379 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25757 event pairs, 438 based on Foata normal form. 1/4010 useless extension candidates. Maximal degree in co-relation 32699. Up to 3290 conditions per place. [2024-06-20 15:29:25,995 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 177 changer transitions 0/507 dead transitions. [2024-06-20 15:29:25,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 507 transitions, 10446 flow [2024-06-20 15:29:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:29:25,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:29:25,996 INFO L175 Difference]: Start difference. First operand has 365 places, 482 transitions, 8968 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:29:25,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 507 transitions, 10446 flow [2024-06-20 15:29:28,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 507 transitions, 10279 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:28,373 INFO L231 Difference]: Finished difference. Result has 366 places, 482 transitions, 9165 flow [2024-06-20 15:29:28,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8805, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9165, PETRI_PLACES=366, PETRI_TRANSITIONS=482} [2024-06-20 15:29:28,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-20 15:29:28,373 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 482 transitions, 9165 flow [2024-06-20 15:29:28,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:28,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:28,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:28,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:29:28,374 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:28,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1914963363, now seen corresponding path program 1 times [2024-06-20 15:29:28,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:28,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555525882] [2024-06-20 15:29:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:28,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:28,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:28,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555525882] [2024-06-20 15:29:28,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555525882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:28,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:28,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068268498] [2024-06-20 15:29:28,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:28,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:28,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:28,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:28,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 482 transitions, 9165 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:28,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:28,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:28,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:29,248 INFO L124 PetriNetUnfolderBase]: 2370/4044 cut-off events. [2024-06-20 15:29:29,248 INFO L125 PetriNetUnfolderBase]: For 470544/470554 co-relation queries the response was YES. [2024-06-20 15:29:29,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32547 conditions, 4044 events. 2370/4044 cut-off events. For 470544/470554 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25980 event pairs, 437 based on Foata normal form. 6/4046 useless extension candidates. Maximal degree in co-relation 32379. Up to 3527 conditions per place. [2024-06-20 15:29:29,303 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 452 selfloop transitions, 47 changer transitions 0/507 dead transitions. [2024-06-20 15:29:29,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 507 transitions, 10268 flow [2024-06-20 15:29:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:29:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:29:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-20 15:29:29,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-20 15:29:29,304 INFO L175 Difference]: Start difference. First operand has 366 places, 482 transitions, 9165 flow. Second operand 10 states and 223 transitions. [2024-06-20 15:29:29,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 507 transitions, 10268 flow [2024-06-20 15:29:31,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 507 transitions, 9357 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 15:29:31,887 INFO L231 Difference]: Finished difference. Result has 365 places, 483 transitions, 8371 flow [2024-06-20 15:29:31,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8254, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8371, PETRI_PLACES=365, PETRI_TRANSITIONS=483} [2024-06-20 15:29:31,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-20 15:29:31,888 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 483 transitions, 8371 flow [2024-06-20 15:29:31,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:31,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:31,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:31,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:29:31,888 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:31,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash 204921963, now seen corresponding path program 2 times [2024-06-20 15:29:31,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:31,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319386782] [2024-06-20 15:29:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:31,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:31,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:31,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319386782] [2024-06-20 15:29:31,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319386782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:31,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:31,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:31,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802174464] [2024-06-20 15:29:31,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:31,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:31,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:31,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:31,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:32,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:32,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 483 transitions, 8371 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:32,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:32,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:32,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:32,811 INFO L124 PetriNetUnfolderBase]: 2357/4029 cut-off events. [2024-06-20 15:29:32,811 INFO L125 PetriNetUnfolderBase]: For 437402/437412 co-relation queries the response was YES. [2024-06-20 15:29:32,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31323 conditions, 4029 events. 2357/4029 cut-off events. For 437402/437412 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25884 event pairs, 386 based on Foata normal form. 6/4033 useless extension candidates. Maximal degree in co-relation 31153. Up to 3487 conditions per place. [2024-06-20 15:29:32,859 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 469 selfloop transitions, 30 changer transitions 0/507 dead transitions. [2024-06-20 15:29:32,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 507 transitions, 9479 flow [2024-06-20 15:29:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:32,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:29:32,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:29:32,860 INFO L175 Difference]: Start difference. First operand has 365 places, 483 transitions, 8371 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:29:32,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 507 transitions, 9479 flow [2024-06-20 15:29:34,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 507 transitions, 9354 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 15:29:34,968 INFO L231 Difference]: Finished difference. Result has 362 places, 483 transitions, 8311 flow [2024-06-20 15:29:34,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8311, PETRI_PLACES=362, PETRI_TRANSITIONS=483} [2024-06-20 15:29:34,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-20 15:29:34,969 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 483 transitions, 8311 flow [2024-06-20 15:29:34,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:34,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:34,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:34,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:29:34,969 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:34,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1491753271, now seen corresponding path program 1 times [2024-06-20 15:29:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:34,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140167746] [2024-06-20 15:29:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:34,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:35,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:35,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140167746] [2024-06-20 15:29:35,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140167746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:35,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:35,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:35,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391035314] [2024-06-20 15:29:35,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:35,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:35,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:35,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:35,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:35,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:35,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 483 transitions, 8311 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:35,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:35,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:35,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:35,822 INFO L124 PetriNetUnfolderBase]: 2362/4034 cut-off events. [2024-06-20 15:29:35,823 INFO L125 PetriNetUnfolderBase]: For 415902/415902 co-relation queries the response was YES. [2024-06-20 15:29:35,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31264 conditions, 4034 events. 2362/4034 cut-off events. For 415902/415902 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 25907 event pairs, 409 based on Foata normal form. 1/4033 useless extension candidates. Maximal degree in co-relation 31094. Up to 3509 conditions per place. [2024-06-20 15:29:35,879 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 454 selfloop transitions, 58 changer transitions 0/520 dead transitions. [2024-06-20 15:29:35,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 520 transitions, 9705 flow [2024-06-20 15:29:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:29:35,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:29:35,880 INFO L175 Difference]: Start difference. First operand has 362 places, 483 transitions, 8311 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:29:35,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 520 transitions, 9705 flow [2024-06-20 15:29:37,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 520 transitions, 9596 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:37,896 INFO L231 Difference]: Finished difference. Result has 364 places, 486 transitions, 8378 flow [2024-06-20 15:29:37,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8202, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8378, PETRI_PLACES=364, PETRI_TRANSITIONS=486} [2024-06-20 15:29:37,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-20 15:29:37,897 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 486 transitions, 8378 flow [2024-06-20 15:29:37,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:37,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:37,897 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] [2024-06-20 15:29:37,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:29:37,897 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:37,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633301, now seen corresponding path program 2 times [2024-06-20 15:29:37,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:37,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973084467] [2024-06-20 15:29:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:38,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:38,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973084467] [2024-06-20 15:29:38,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973084467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:38,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:38,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:38,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126727120] [2024-06-20 15:29:38,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:38,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:38,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:38,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:38,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:38,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:38,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 486 transitions, 8378 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:38,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:38,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:38,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:38,828 INFO L124 PetriNetUnfolderBase]: 2359/4030 cut-off events. [2024-06-20 15:29:38,828 INFO L125 PetriNetUnfolderBase]: For 418135/418135 co-relation queries the response was YES. [2024-06-20 15:29:38,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31034 conditions, 4030 events. 2359/4030 cut-off events. For 418135/418135 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 25902 event pairs, 409 based on Foata normal form. 1/4029 useless extension candidates. Maximal degree in co-relation 30864. Up to 3506 conditions per place. [2024-06-20 15:29:38,882 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 455 selfloop transitions, 57 changer transitions 0/520 dead transitions. [2024-06-20 15:29:38,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 520 transitions, 9518 flow [2024-06-20 15:29:38,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:29:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:29:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:29:38,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-20 15:29:38,883 INFO L175 Difference]: Start difference. First operand has 364 places, 486 transitions, 8378 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:29:38,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 520 transitions, 9518 flow [2024-06-20 15:29:41,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 520 transitions, 9380 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:41,300 INFO L231 Difference]: Finished difference. Result has 367 places, 486 transitions, 8360 flow [2024-06-20 15:29:41,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8240, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8360, PETRI_PLACES=367, PETRI_TRANSITIONS=486} [2024-06-20 15:29:41,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-20 15:29:41,300 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 486 transitions, 8360 flow [2024-06-20 15:29:41,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:41,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:41,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:41,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:29:41,301 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:41,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:41,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633115, now seen corresponding path program 1 times [2024-06-20 15:29:41,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:41,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119981769] [2024-06-20 15:29:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:41,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:41,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119981769] [2024-06-20 15:29:41,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119981769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:41,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:41,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:41,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926499346] [2024-06-20 15:29:41,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:41,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:41,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:41,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:41,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:41,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 486 transitions, 8360 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:41,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:41,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:41,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:42,205 INFO L124 PetriNetUnfolderBase]: 2372/4055 cut-off events. [2024-06-20 15:29:42,205 INFO L125 PetriNetUnfolderBase]: For 424286/424286 co-relation queries the response was YES. [2024-06-20 15:29:42,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31291 conditions, 4055 events. 2372/4055 cut-off events. For 424286/424286 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26083 event pairs, 408 based on Foata normal form. 1/4054 useless extension candidates. Maximal degree in co-relation 31120. Up to 3451 conditions per place. [2024-06-20 15:29:42,262 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 102 changer transitions 0/528 dead transitions. [2024-06-20 15:29:42,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 528 transitions, 10048 flow [2024-06-20 15:29:42,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:29:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:29:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 15:29:42,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 15:29:42,262 INFO L175 Difference]: Start difference. First operand has 367 places, 486 transitions, 8360 flow. Second operand 9 states and 222 transitions. [2024-06-20 15:29:42,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 528 transitions, 10048 flow [2024-06-20 15:29:44,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 528 transitions, 9897 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 15:29:44,712 INFO L231 Difference]: Finished difference. Result has 369 places, 492 transitions, 8590 flow [2024-06-20 15:29:44,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8209, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8590, PETRI_PLACES=369, PETRI_TRANSITIONS=492} [2024-06-20 15:29:44,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-20 15:29:44,712 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 492 transitions, 8590 flow [2024-06-20 15:29:44,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:44,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:44,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:29:44,713 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:44,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:44,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1580291131, now seen corresponding path program 1 times [2024-06-20 15:29:44,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:44,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504430427] [2024-06-20 15:29:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:44,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:44,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:44,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504430427] [2024-06-20 15:29:44,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504430427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:44,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:44,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:44,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662456478] [2024-06-20 15:29:44,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:44,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:44,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 492 transitions, 8590 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:44,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:44,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:44,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:45,617 INFO L124 PetriNetUnfolderBase]: 2452/4193 cut-off events. [2024-06-20 15:29:45,617 INFO L125 PetriNetUnfolderBase]: For 462269/462269 co-relation queries the response was YES. [2024-06-20 15:29:45,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32596 conditions, 4193 events. 2452/4193 cut-off events. For 462269/462269 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27108 event pairs, 351 based on Foata normal form. 6/4197 useless extension candidates. Maximal degree in co-relation 32423. Up to 3483 conditions per place. [2024-06-20 15:29:45,675 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 477 selfloop transitions, 48 changer transitions 0/533 dead transitions. [2024-06-20 15:29:45,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 533 transitions, 10054 flow [2024-06-20 15:29:45,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:29:45,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:29:45,676 INFO L175 Difference]: Start difference. First operand has 369 places, 492 transitions, 8590 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:29:45,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 533 transitions, 10054 flow [2024-06-20 15:29:47,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 533 transitions, 9685 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-20 15:29:47,955 INFO L231 Difference]: Finished difference. Result has 373 places, 496 transitions, 8397 flow [2024-06-20 15:29:47,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8221, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8397, PETRI_PLACES=373, PETRI_TRANSITIONS=496} [2024-06-20 15:29:47,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-20 15:29:47,956 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 496 transitions, 8397 flow [2024-06-20 15:29:47,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:47,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:47,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:47,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:29:47,956 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:47,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:47,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1314593851, now seen corresponding path program 2 times [2024-06-20 15:29:47,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:47,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275296977] [2024-06-20 15:29:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:47,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:48,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:48,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275296977] [2024-06-20 15:29:48,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275296977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:48,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:48,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:48,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723515854] [2024-06-20 15:29:48,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:48,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:48,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:48,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:48,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:48,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:48,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 496 transitions, 8397 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:48,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:48,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:48,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:48,875 INFO L124 PetriNetUnfolderBase]: 2518/4303 cut-off events. [2024-06-20 15:29:48,876 INFO L125 PetriNetUnfolderBase]: For 470120/470120 co-relation queries the response was YES. [2024-06-20 15:29:48,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33469 conditions, 4303 events. 2518/4303 cut-off events. For 470120/470120 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 28010 event pairs, 437 based on Foata normal form. 6/4307 useless extension candidates. Maximal degree in co-relation 33295. Up to 3728 conditions per place. [2024-06-20 15:29:48,939 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 480 selfloop transitions, 50 changer transitions 0/538 dead transitions. [2024-06-20 15:29:48,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 538 transitions, 9779 flow [2024-06-20 15:29:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:29:48,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-20 15:29:48,940 INFO L175 Difference]: Start difference. First operand has 373 places, 496 transitions, 8397 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:29:48,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 538 transitions, 9779 flow [2024-06-20 15:29:51,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 538 transitions, 9645 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:29:51,265 INFO L231 Difference]: Finished difference. Result has 377 places, 505 transitions, 8544 flow [2024-06-20 15:29:51,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8276, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8544, PETRI_PLACES=377, PETRI_TRANSITIONS=505} [2024-06-20 15:29:51,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-20 15:29:51,266 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 505 transitions, 8544 flow [2024-06-20 15:29:51,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:51,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:51,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:51,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:29:51,266 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:51,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:51,267 INFO L85 PathProgramCache]: Analyzing trace with hash -533776097, now seen corresponding path program 3 times [2024-06-20 15:29:51,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:51,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550792300] [2024-06-20 15:29:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:51,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:51,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550792300] [2024-06-20 15:29:51,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550792300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:51,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:51,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354051869] [2024-06-20 15:29:51,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:51,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:51,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:51,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:51,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:51,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:51,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 505 transitions, 8544 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:51,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:51,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:51,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:52,183 INFO L124 PetriNetUnfolderBase]: 2547/4344 cut-off events. [2024-06-20 15:29:52,183 INFO L125 PetriNetUnfolderBase]: For 469506/469520 co-relation queries the response was YES. [2024-06-20 15:29:52,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34119 conditions, 4344 events. 2547/4344 cut-off events. For 469506/469520 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28284 event pairs, 460 based on Foata normal form. 2/4340 useless extension candidates. Maximal degree in co-relation 33944. Up to 3432 conditions per place. [2024-06-20 15:29:52,246 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 358 selfloop transitions, 180 changer transitions 0/546 dead transitions. [2024-06-20 15:29:52,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 546 transitions, 10386 flow [2024-06-20 15:29:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:29:52,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:29:52,247 INFO L175 Difference]: Start difference. First operand has 377 places, 505 transitions, 8544 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:29:52,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 546 transitions, 10386 flow [2024-06-20 15:29:54,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 546 transitions, 10282 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:54,616 INFO L231 Difference]: Finished difference. Result has 381 places, 517 transitions, 9062 flow [2024-06-20 15:29:54,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8440, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9062, PETRI_PLACES=381, PETRI_TRANSITIONS=517} [2024-06-20 15:29:54,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-20 15:29:54,617 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 517 transitions, 9062 flow [2024-06-20 15:29:54,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:54,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:54,617 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] [2024-06-20 15:29:54,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:29:54,617 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:54,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:54,617 INFO L85 PathProgramCache]: Analyzing trace with hash -533655941, now seen corresponding path program 2 times [2024-06-20 15:29:54,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:54,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45039796] [2024-06-20 15:29:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:54,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:54,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:54,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45039796] [2024-06-20 15:29:54,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45039796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:54,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:54,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:54,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300866506] [2024-06-20 15:29:54,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:54,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:54,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:54,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:54,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:54,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:54,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 517 transitions, 9062 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:54,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:54,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:54,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:55,508 INFO L124 PetriNetUnfolderBase]: 2560/4365 cut-off events. [2024-06-20 15:29:55,508 INFO L125 PetriNetUnfolderBase]: For 486419/486435 co-relation queries the response was YES. [2024-06-20 15:29:55,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34821 conditions, 4365 events. 2560/4365 cut-off events. For 486419/486435 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28419 event pairs, 464 based on Foata normal form. 2/4361 useless extension candidates. Maximal degree in co-relation 34645. Up to 3131 conditions per place. [2024-06-20 15:29:55,569 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 278 changer transitions 0/554 dead transitions. [2024-06-20 15:29:55,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 554 transitions, 11134 flow [2024-06-20 15:29:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:29:55,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:29:55,570 INFO L175 Difference]: Start difference. First operand has 381 places, 517 transitions, 9062 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:29:55,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 554 transitions, 11134 flow [2024-06-20 15:29:58,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 554 transitions, 10652 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-20 15:29:58,162 INFO L231 Difference]: Finished difference. Result has 386 places, 526 transitions, 9607 flow [2024-06-20 15:29:58,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8580, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9607, PETRI_PLACES=386, PETRI_TRANSITIONS=526} [2024-06-20 15:29:58,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-20 15:29:58,163 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 526 transitions, 9607 flow [2024-06-20 15:29:58,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:58,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:58,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:58,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:29:58,163 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:58,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1290852483, now seen corresponding path program 4 times [2024-06-20 15:29:58,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:58,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286988702] [2024-06-20 15:29:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:58,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:58,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:58,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286988702] [2024-06-20 15:29:58,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286988702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:58,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:58,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737268905] [2024-06-20 15:29:58,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:58,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:58,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:58,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:58,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 526 transitions, 9607 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:29:58,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:58,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:58,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:59,120 INFO L124 PetriNetUnfolderBase]: 2565/4376 cut-off events. [2024-06-20 15:29:59,120 INFO L125 PetriNetUnfolderBase]: For 498726/498742 co-relation queries the response was YES. [2024-06-20 15:29:59,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35923 conditions, 4376 events. 2565/4376 cut-off events. For 498726/498742 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28563 event pairs, 460 based on Foata normal form. 2/4372 useless extension candidates. Maximal degree in co-relation 35744. Up to 3456 conditions per place. [2024-06-20 15:29:59,184 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 364 selfloop transitions, 182 changer transitions 0/554 dead transitions. [2024-06-20 15:29:59,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 554 transitions, 11032 flow [2024-06-20 15:29:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:29:59,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-20 15:29:59,185 INFO L175 Difference]: Start difference. First operand has 386 places, 526 transitions, 9607 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:29:59,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 554 transitions, 11032 flow [2024-06-20 15:30:01,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 554 transitions, 10801 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-20 15:30:01,715 INFO L231 Difference]: Finished difference. Result has 391 places, 529 transitions, 9787 flow [2024-06-20 15:30:01,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9376, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9787, PETRI_PLACES=391, PETRI_TRANSITIONS=529} [2024-06-20 15:30:01,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-20 15:30:01,715 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 529 transitions, 9787 flow [2024-06-20 15:30:01,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:01,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:01,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:01,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:30:01,715 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:01,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1173546649, now seen corresponding path program 5 times [2024-06-20 15:30:01,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:01,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086679846] [2024-06-20 15:30:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:01,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:01,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:01,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086679846] [2024-06-20 15:30:01,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086679846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:01,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:01,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:01,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5007527] [2024-06-20 15:30:01,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:01,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:01,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:01,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:01,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:01,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:01,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 529 transitions, 9787 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:01,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:01,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:01,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:02,709 INFO L124 PetriNetUnfolderBase]: 2602/4436 cut-off events. [2024-06-20 15:30:02,709 INFO L125 PetriNetUnfolderBase]: For 528578/528586 co-relation queries the response was YES. [2024-06-20 15:30:02,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36366 conditions, 4436 events. 2602/4436 cut-off events. For 528578/528586 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28960 event pairs, 455 based on Foata normal form. 2/4434 useless extension candidates. Maximal degree in co-relation 36185. Up to 3498 conditions per place. [2024-06-20 15:30:02,773 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 358 selfloop transitions, 205 changer transitions 0/571 dead transitions. [2024-06-20 15:30:02,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 571 transitions, 12024 flow [2024-06-20 15:30:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:30:02,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:30:02,774 INFO L175 Difference]: Start difference. First operand has 391 places, 529 transitions, 9787 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:30:02,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 571 transitions, 12024 flow [2024-06-20 15:30:06,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 571 transitions, 11774 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:30:06,019 INFO L231 Difference]: Finished difference. Result has 393 places, 544 transitions, 10334 flow [2024-06-20 15:30:06,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9552, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10334, PETRI_PLACES=393, PETRI_TRANSITIONS=544} [2024-06-20 15:30:06,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-20 15:30:06,019 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 544 transitions, 10334 flow [2024-06-20 15:30:06,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:06,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:06,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:06,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:30:06,020 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:06,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:06,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1163071129, now seen corresponding path program 6 times [2024-06-20 15:30:06,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:06,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121635257] [2024-06-20 15:30:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:06,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:06,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:06,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121635257] [2024-06-20 15:30:06,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121635257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:06,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:06,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:06,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629010312] [2024-06-20 15:30:06,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:06,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:06,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:06,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:06,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 544 transitions, 10334 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:06,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:06,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:06,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:06,979 INFO L124 PetriNetUnfolderBase]: 2615/4458 cut-off events. [2024-06-20 15:30:06,979 INFO L125 PetriNetUnfolderBase]: For 547499/547507 co-relation queries the response was YES. [2024-06-20 15:30:07,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36855 conditions, 4458 events. 2615/4458 cut-off events. For 547499/547507 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 29198 event pairs, 455 based on Foata normal form. 2/4456 useless extension candidates. Maximal degree in co-relation 36673. Up to 3513 conditions per place. [2024-06-20 15:30:07,061 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 349 selfloop transitions, 216 changer transitions 0/573 dead transitions. [2024-06-20 15:30:07,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 573 transitions, 12338 flow [2024-06-20 15:30:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:30:07,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:30:07,062 INFO L175 Difference]: Start difference. First operand has 393 places, 544 transitions, 10334 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:30:07,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 573 transitions, 12338 flow [2024-06-20 15:30:09,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 573 transitions, 11996 flow, removed 79 selfloop flow, removed 2 redundant places. [2024-06-20 15:30:09,666 INFO L231 Difference]: Finished difference. Result has 398 places, 550 transitions, 10582 flow [2024-06-20 15:30:09,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10026, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10582, PETRI_PLACES=398, PETRI_TRANSITIONS=550} [2024-06-20 15:30:09,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-20 15:30:09,667 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 550 transitions, 10582 flow [2024-06-20 15:30:09,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:09,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:09,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:09,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:30:09,667 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:09,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:09,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1047601213, now seen corresponding path program 3 times [2024-06-20 15:30:09,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:09,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618394124] [2024-06-20 15:30:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:09,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:09,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:09,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618394124] [2024-06-20 15:30:09,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618394124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:09,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:09,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:09,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80417262] [2024-06-20 15:30:09,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:09,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:09,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:09,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:09,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:09,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 550 transitions, 10582 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:09,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:09,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:09,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:10,630 INFO L124 PetriNetUnfolderBase]: 2628/4471 cut-off events. [2024-06-20 15:30:10,631 INFO L125 PetriNetUnfolderBase]: For 565594/565610 co-relation queries the response was YES. [2024-06-20 15:30:10,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37163 conditions, 4471 events. 2628/4471 cut-off events. For 565594/565610 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29190 event pairs, 462 based on Foata normal form. 2/4467 useless extension candidates. Maximal degree in co-relation 36980. Up to 3183 conditions per place. [2024-06-20 15:30:10,698 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 297 changer transitions 0/581 dead transitions. [2024-06-20 15:30:10,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 581 transitions, 12634 flow [2024-06-20 15:30:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:30:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:30:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:30:10,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-20 15:30:10,699 INFO L175 Difference]: Start difference. First operand has 398 places, 550 transitions, 10582 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:30:10,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 581 transitions, 12634 flow [2024-06-20 15:30:14,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 581 transitions, 12313 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 15:30:14,007 INFO L231 Difference]: Finished difference. Result has 403 places, 556 transitions, 10985 flow [2024-06-20 15:30:14,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10261, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10985, PETRI_PLACES=403, PETRI_TRANSITIONS=556} [2024-06-20 15:30:14,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-20 15:30:14,008 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 556 transitions, 10985 flow [2024-06-20 15:30:14,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:14,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:14,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:14,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:30:14,008 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:14,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash -208915007, now seen corresponding path program 7 times [2024-06-20 15:30:14,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:14,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888460635] [2024-06-20 15:30:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:14,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:14,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:14,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888460635] [2024-06-20 15:30:14,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888460635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:14,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:14,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:14,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126255701] [2024-06-20 15:30:14,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:14,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:14,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:14,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 556 transitions, 10985 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:14,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:14,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:14,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:14,996 INFO L124 PetriNetUnfolderBase]: 2625/4473 cut-off events. [2024-06-20 15:30:14,997 INFO L125 PetriNetUnfolderBase]: For 571488/571504 co-relation queries the response was YES. [2024-06-20 15:30:15,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37356 conditions, 4473 events. 2625/4473 cut-off events. For 571488/571504 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 29306 event pairs, 460 based on Foata normal form. 2/4469 useless extension candidates. Maximal degree in co-relation 37172. Up to 3528 conditions per place. [2024-06-20 15:30:15,174 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 203 changer transitions 0/578 dead transitions. [2024-06-20 15:30:15,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 578 transitions, 12413 flow [2024-06-20 15:30:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:30:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:30:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:30:15,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:30:15,175 INFO L175 Difference]: Start difference. First operand has 403 places, 556 transitions, 10985 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:30:15,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 578 transitions, 12413 flow [2024-06-20 15:30:18,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 578 transitions, 11844 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:30:18,183 INFO L231 Difference]: Finished difference. Result has 406 places, 556 transitions, 10828 flow [2024-06-20 15:30:18,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10416, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10828, PETRI_PLACES=406, PETRI_TRANSITIONS=556} [2024-06-20 15:30:18,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-20 15:30:18,183 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 556 transitions, 10828 flow [2024-06-20 15:30:18,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:18,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:18,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:18,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:30:18,184 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:18,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1047779959, now seen corresponding path program 8 times [2024-06-20 15:30:18,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:18,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603086676] [2024-06-20 15:30:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:18,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:18,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:18,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603086676] [2024-06-20 15:30:18,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603086676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:18,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:18,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:18,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530593692] [2024-06-20 15:30:18,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:18,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:18,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:18,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:18,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:18,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 556 transitions, 10828 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:18,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:18,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:18,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:19,174 INFO L124 PetriNetUnfolderBase]: 2630/4480 cut-off events. [2024-06-20 15:30:19,174 INFO L125 PetriNetUnfolderBase]: For 579871/579887 co-relation queries the response was YES. [2024-06-20 15:30:19,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37293 conditions, 4480 events. 2630/4480 cut-off events. For 579871/579887 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29322 event pairs, 460 based on Foata normal form. 2/4476 useless extension candidates. Maximal degree in co-relation 37108. Up to 3534 conditions per place. [2024-06-20 15:30:19,240 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 206 changer transitions 0/581 dead transitions. [2024-06-20 15:30:19,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 581 transitions, 12320 flow [2024-06-20 15:30:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:30:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:30:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:30:19,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:30:19,241 INFO L175 Difference]: Start difference. First operand has 406 places, 556 transitions, 10828 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:30:19,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 581 transitions, 12320 flow [2024-06-20 15:30:22,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 581 transitions, 11735 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 15:30:22,846 INFO L231 Difference]: Finished difference. Result has 407 places, 559 transitions, 10717 flow [2024-06-20 15:30:22,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10252, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10717, PETRI_PLACES=407, PETRI_TRANSITIONS=559} [2024-06-20 15:30:22,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-20 15:30:22,846 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 559 transitions, 10717 flow [2024-06-20 15:30:22,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:22,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:22,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:22,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:30:22,847 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:22,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2091647585, now seen corresponding path program 4 times [2024-06-20 15:30:22,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:22,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174350555] [2024-06-20 15:30:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:22,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:22,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:22,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174350555] [2024-06-20 15:30:22,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174350555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:22,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:22,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:22,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424739551] [2024-06-20 15:30:22,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:22,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:22,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:22,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:22,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:22,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 559 transitions, 10717 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:22,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:22,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:22,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:23,817 INFO L124 PetriNetUnfolderBase]: 2627/4475 cut-off events. [2024-06-20 15:30:23,818 INFO L125 PetriNetUnfolderBase]: For 577966/577982 co-relation queries the response was YES. [2024-06-20 15:30:23,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37143 conditions, 4475 events. 2627/4475 cut-off events. For 577966/577982 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29347 event pairs, 462 based on Foata normal form. 2/4471 useless extension candidates. Maximal degree in co-relation 36957. Up to 3183 conditions per place. [2024-06-20 15:30:23,891 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 297 changer transitions 0/583 dead transitions. [2024-06-20 15:30:23,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 583 transitions, 12439 flow [2024-06-20 15:30:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:30:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:30:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:30:23,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-20 15:30:23,892 INFO L175 Difference]: Start difference. First operand has 407 places, 559 transitions, 10717 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:30:23,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 583 transitions, 12439 flow [2024-06-20 15:30:27,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 583 transitions, 12130 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:30:27,391 INFO L231 Difference]: Finished difference. Result has 410 places, 559 transitions, 11008 flow [2024-06-20 15:30:27,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10408, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11008, PETRI_PLACES=410, PETRI_TRANSITIONS=559} [2024-06-20 15:30:27,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-20 15:30:27,392 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 559 transitions, 11008 flow [2024-06-20 15:30:27,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:27,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:27,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:27,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:30:27,392 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:27,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:27,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1899966113, now seen corresponding path program 5 times [2024-06-20 15:30:27,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:27,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680356684] [2024-06-20 15:30:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:27,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:27,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:27,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680356684] [2024-06-20 15:30:27,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680356684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:27,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:27,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:27,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744378169] [2024-06-20 15:30:27,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:27,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:27,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:27,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:27,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 559 transitions, 11008 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:27,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:27,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:27,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:28,414 INFO L124 PetriNetUnfolderBase]: 2648/4518 cut-off events. [2024-06-20 15:30:28,414 INFO L125 PetriNetUnfolderBase]: For 602502/602504 co-relation queries the response was YES. [2024-06-20 15:30:28,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37991 conditions, 4518 events. 2648/4518 cut-off events. For 602502/602504 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29677 event pairs, 441 based on Foata normal form. 1/4517 useless extension candidates. Maximal degree in co-relation 37804. Up to 3889 conditions per place. [2024-06-20 15:30:28,482 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 496 selfloop transitions, 87 changer transitions 0/591 dead transitions. [2024-06-20 15:30:28,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 591 transitions, 12910 flow [2024-06-20 15:30:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:30:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:30:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:30:28,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-20 15:30:28,483 INFO L175 Difference]: Start difference. First operand has 410 places, 559 transitions, 11008 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:30:28,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 591 transitions, 12910 flow [2024-06-20 15:30:32,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 591 transitions, 12356 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:32,369 INFO L231 Difference]: Finished difference. Result has 415 places, 567 transitions, 10833 flow [2024-06-20 15:30:32,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10466, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10833, PETRI_PLACES=415, PETRI_TRANSITIONS=567} [2024-06-20 15:30:32,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-20 15:30:32,369 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 567 transitions, 10833 flow [2024-06-20 15:30:32,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:32,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:32,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:32,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:30:32,370 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:32,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1671886217, now seen corresponding path program 9 times [2024-06-20 15:30:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:32,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991078522] [2024-06-20 15:30:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:32,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:32,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991078522] [2024-06-20 15:30:32,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991078522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:32,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:32,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:32,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18468039] [2024-06-20 15:30:32,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:32,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:32,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:32,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:32,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:32,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:32,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 567 transitions, 10833 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:32,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:32,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:32,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:33,356 INFO L124 PetriNetUnfolderBase]: 2645/4512 cut-off events. [2024-06-20 15:30:33,357 INFO L125 PetriNetUnfolderBase]: For 601433/601435 co-relation queries the response was YES. [2024-06-20 15:30:33,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37457 conditions, 4512 events. 2645/4512 cut-off events. For 601433/601435 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29629 event pairs, 440 based on Foata normal form. 1/4511 useless extension candidates. Maximal degree in co-relation 37268. Up to 3970 conditions per place. [2024-06-20 15:30:33,426 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 532 selfloop transitions, 46 changer transitions 0/586 dead transitions. [2024-06-20 15:30:33,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 586 transitions, 12275 flow [2024-06-20 15:30:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:30:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:30:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:30:33,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-20 15:30:33,427 INFO L175 Difference]: Start difference. First operand has 415 places, 567 transitions, 10833 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:30:33,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 586 transitions, 12275 flow [2024-06-20 15:30:36,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 586 transitions, 12126 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:36,712 INFO L231 Difference]: Finished difference. Result has 417 places, 567 transitions, 10782 flow [2024-06-20 15:30:36,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10684, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10782, PETRI_PLACES=417, PETRI_TRANSITIONS=567} [2024-06-20 15:30:36,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-20 15:30:36,713 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 567 transitions, 10782 flow [2024-06-20 15:30:36,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:36,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:36,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:36,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:30:36,713 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:36,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:36,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1672064963, now seen corresponding path program 6 times [2024-06-20 15:30:36,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:36,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696498937] [2024-06-20 15:30:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:36,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:36,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696498937] [2024-06-20 15:30:36,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696498937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:36,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:36,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:36,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517529278] [2024-06-20 15:30:36,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:36,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:36,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:36,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:36,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:36,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:36,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 567 transitions, 10782 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:36,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:36,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:36,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:37,741 INFO L124 PetriNetUnfolderBase]: 2650/4521 cut-off events. [2024-06-20 15:30:37,741 INFO L125 PetriNetUnfolderBase]: For 610245/610247 co-relation queries the response was YES. [2024-06-20 15:30:37,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37637 conditions, 4521 events. 2650/4521 cut-off events. For 610245/610247 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29741 event pairs, 441 based on Foata normal form. 1/4520 useless extension candidates. Maximal degree in co-relation 37446. Up to 3891 conditions per place. [2024-06-20 15:30:37,809 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 90 changer transitions 0/593 dead transitions. [2024-06-20 15:30:37,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 593 transitions, 12609 flow [2024-06-20 15:30:37,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:30:37,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:30:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-20 15:30:37,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-20 15:30:37,809 INFO L175 Difference]: Start difference. First operand has 417 places, 567 transitions, 10782 flow. Second operand 9 states and 212 transitions. [2024-06-20 15:30:37,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 593 transitions, 12609 flow [2024-06-20 15:30:41,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 593 transitions, 12515 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:41,776 INFO L231 Difference]: Finished difference. Result has 420 places, 571 transitions, 10996 flow [2024-06-20 15:30:41,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10688, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10996, PETRI_PLACES=420, PETRI_TRANSITIONS=571} [2024-06-20 15:30:41,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-20 15:30:41,776 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 571 transitions, 10996 flow [2024-06-20 15:30:41,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:41,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:41,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:41,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:30:41,776 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:41,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:41,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1671679013, now seen corresponding path program 7 times [2024-06-20 15:30:41,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:41,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221579364] [2024-06-20 15:30:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:41,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:41,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221579364] [2024-06-20 15:30:41,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221579364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:41,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:41,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:41,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027354825] [2024-06-20 15:30:41,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:41,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:41,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:41,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:41,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:41,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 571 transitions, 10996 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:41,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:41,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:41,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:42,797 INFO L124 PetriNetUnfolderBase]: 2647/4517 cut-off events. [2024-06-20 15:30:42,798 INFO L125 PetriNetUnfolderBase]: For 613114/613116 co-relation queries the response was YES. [2024-06-20 15:30:42,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37655 conditions, 4517 events. 2647/4517 cut-off events. For 613114/613116 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29723 event pairs, 441 based on Foata normal form. 1/4516 useless extension candidates. Maximal degree in co-relation 37463. Up to 3889 conditions per place. [2024-06-20 15:30:42,867 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 90 changer transitions 0/592 dead transitions. [2024-06-20 15:30:42,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 592 transitions, 12469 flow [2024-06-20 15:30:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:30:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:30:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-20 15:30:42,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-20 15:30:42,868 INFO L175 Difference]: Start difference. First operand has 420 places, 571 transitions, 10996 flow. Second operand 9 states and 211 transitions. [2024-06-20 15:30:42,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 592 transitions, 12469 flow [2024-06-20 15:30:47,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 592 transitions, 12310 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-20 15:30:47,306 INFO L231 Difference]: Finished difference. Result has 425 places, 571 transitions, 11023 flow [2024-06-20 15:30:47,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10837, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11023, PETRI_PLACES=425, PETRI_TRANSITIONS=571} [2024-06-20 15:30:47,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-20 15:30:47,307 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 571 transitions, 11023 flow [2024-06-20 15:30:47,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:47,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:47,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:47,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:30:47,307 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:47,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:47,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1671678827, now seen corresponding path program 10 times [2024-06-20 15:30:47,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:47,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316579911] [2024-06-20 15:30:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:47,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:47,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:47,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316579911] [2024-06-20 15:30:47,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316579911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:47,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:47,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:47,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961706300] [2024-06-20 15:30:47,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:47,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:47,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:47,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:47,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:47,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:47,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 571 transitions, 11023 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:47,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:47,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:47,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:48,426 INFO L124 PetriNetUnfolderBase]: 2644/4513 cut-off events. [2024-06-20 15:30:48,426 INFO L125 PetriNetUnfolderBase]: For 614588/614590 co-relation queries the response was YES. [2024-06-20 15:30:48,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37685 conditions, 4513 events. 2644/4513 cut-off events. For 614588/614590 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29653 event pairs, 440 based on Foata normal form. 1/4512 useless extension candidates. Maximal degree in co-relation 37491. Up to 3970 conditions per place. [2024-06-20 15:30:48,495 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 536 selfloop transitions, 46 changer transitions 0/590 dead transitions. [2024-06-20 15:30:48,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 590 transitions, 12243 flow [2024-06-20 15:30:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:30:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:30:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 15:30:48,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-20 15:30:48,496 INFO L175 Difference]: Start difference. First operand has 425 places, 571 transitions, 11023 flow. Second operand 9 states and 204 transitions. [2024-06-20 15:30:48,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 590 transitions, 12243 flow [2024-06-20 15:30:52,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 590 transitions, 12051 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:30:52,770 INFO L231 Difference]: Finished difference. Result has 426 places, 571 transitions, 10929 flow [2024-06-20 15:30:52,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10831, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10929, PETRI_PLACES=426, PETRI_TRANSITIONS=571} [2024-06-20 15:30:52,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-20 15:30:52,771 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 571 transitions, 10929 flow [2024-06-20 15:30:52,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:52,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:52,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:52,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:30:52,771 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:52,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1931917797, now seen corresponding path program 3 times [2024-06-20 15:30:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:52,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490502921] [2024-06-20 15:30:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:52,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:52,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:52,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490502921] [2024-06-20 15:30:52,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490502921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:52,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:52,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:52,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657377824] [2024-06-20 15:30:52,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:52,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:52,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:52,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:52,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:52,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:52,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 571 transitions, 10929 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:52,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:52,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:52,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:53,807 INFO L124 PetriNetUnfolderBase]: 2672/4561 cut-off events. [2024-06-20 15:30:53,807 INFO L125 PetriNetUnfolderBase]: For 659045/659047 co-relation queries the response was YES. [2024-06-20 15:30:53,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37944 conditions, 4561 events. 2672/4561 cut-off events. For 659045/659047 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 30055 event pairs, 441 based on Foata normal form. 6/4565 useless extension candidates. Maximal degree in co-relation 37749. Up to 3947 conditions per place. [2024-06-20 15:30:53,882 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 545 selfloop transitions, 48 changer transitions 0/601 dead transitions. [2024-06-20 15:30:53,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 601 transitions, 12302 flow [2024-06-20 15:30:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:30:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:30:53,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:30:53,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-20 15:30:53,883 INFO L175 Difference]: Start difference. First operand has 426 places, 571 transitions, 10929 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:30:53,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 601 transitions, 12302 flow [2024-06-20 15:30:58,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 601 transitions, 12200 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:30:58,163 INFO L231 Difference]: Finished difference. Result has 428 places, 575 transitions, 11016 flow [2024-06-20 15:30:58,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10829, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11016, PETRI_PLACES=428, PETRI_TRANSITIONS=575} [2024-06-20 15:30:58,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-20 15:30:58,163 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 575 transitions, 11016 flow [2024-06-20 15:30:58,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:30:58,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:58,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:58,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:30:58,164 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:58,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:58,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1165920153, now seen corresponding path program 1 times [2024-06-20 15:30:58,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:58,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562601269] [2024-06-20 15:30:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:58,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:58,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:58,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562601269] [2024-06-20 15:30:58,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562601269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:58,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:58,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:58,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621195367] [2024-06-20 15:30:58,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:58,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:58,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:58,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:58,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:58,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:58,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 575 transitions, 11016 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:58,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:58,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:58,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:59,282 INFO L124 PetriNetUnfolderBase]: 2693/4588 cut-off events. [2024-06-20 15:30:59,282 INFO L125 PetriNetUnfolderBase]: For 660293/660299 co-relation queries the response was YES. [2024-06-20 15:30:59,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38542 conditions, 4588 events. 2693/4588 cut-off events. For 660293/660299 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 30253 event pairs, 462 based on Foata normal form. 3/4585 useless extension candidates. Maximal degree in co-relation 38344. Up to 3891 conditions per place. [2024-06-20 15:30:59,346 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 502 selfloop transitions, 97 changer transitions 0/607 dead transitions. [2024-06-20 15:30:59,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 607 transitions, 12592 flow [2024-06-20 15:30:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:30:59,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:30:59,347 INFO L175 Difference]: Start difference. First operand has 428 places, 575 transitions, 11016 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:30:59,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 607 transitions, 12592 flow [2024-06-20 15:31:03,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 607 transitions, 12497 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 15:31:03,482 INFO L231 Difference]: Finished difference. Result has 432 places, 579 transitions, 11172 flow [2024-06-20 15:31:03,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10921, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11172, PETRI_PLACES=432, PETRI_TRANSITIONS=579} [2024-06-20 15:31:03,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-20 15:31:03,483 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 579 transitions, 11172 flow [2024-06-20 15:31:03,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:03,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:03,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:03,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:31:03,483 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:03,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:03,483 INFO L85 PathProgramCache]: Analyzing trace with hash 86323003, now seen corresponding path program 2 times [2024-06-20 15:31:03,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:03,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528194764] [2024-06-20 15:31:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:03,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:03,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:03,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528194764] [2024-06-20 15:31:03,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528194764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:03,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:03,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:03,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084440967] [2024-06-20 15:31:03,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:03,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:03,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:03,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:03,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:03,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:03,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 579 transitions, 11172 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:03,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:03,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:03,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:04,521 INFO L124 PetriNetUnfolderBase]: 2701/4607 cut-off events. [2024-06-20 15:31:04,521 INFO L125 PetriNetUnfolderBase]: For 671030/671036 co-relation queries the response was YES. [2024-06-20 15:31:04,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38845 conditions, 4607 events. 2701/4607 cut-off events. For 671030/671036 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 30449 event pairs, 471 based on Foata normal form. 3/4606 useless extension candidates. Maximal degree in co-relation 38646. Up to 3950 conditions per place. [2024-06-20 15:31:04,596 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 500 selfloop transitions, 96 changer transitions 0/604 dead transitions. [2024-06-20 15:31:04,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 604 transitions, 12468 flow [2024-06-20 15:31:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:31:04,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-20 15:31:04,597 INFO L175 Difference]: Start difference. First operand has 432 places, 579 transitions, 11172 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:31:04,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 604 transitions, 12468 flow [2024-06-20 15:31:08,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 604 transitions, 12314 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 15:31:08,190 INFO L231 Difference]: Finished difference. Result has 436 places, 581 transitions, 11247 flow [2024-06-20 15:31:08,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11030, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11247, PETRI_PLACES=436, PETRI_TRANSITIONS=581} [2024-06-20 15:31:08,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-20 15:31:08,191 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 581 transitions, 11247 flow [2024-06-20 15:31:08,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:08,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:08,191 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] [2024-06-20 15:31:08,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:31:08,192 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:08,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2031529767, now seen corresponding path program 3 times [2024-06-20 15:31:08,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:08,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301315773] [2024-06-20 15:31:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:08,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:08,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301315773] [2024-06-20 15:31:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301315773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:08,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:08,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:08,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051444595] [2024-06-20 15:31:08,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:08,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:08,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:08,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:08,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:08,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 581 transitions, 11247 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:31:08,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:08,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:08,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:09,251 INFO L124 PetriNetUnfolderBase]: 2709/4612 cut-off events. [2024-06-20 15:31:09,251 INFO L125 PetriNetUnfolderBase]: For 679815/679823 co-relation queries the response was YES. [2024-06-20 15:31:09,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39098 conditions, 4612 events. 2709/4612 cut-off events. For 679815/679823 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 30452 event pairs, 468 based on Foata normal form. 3/4610 useless extension candidates. Maximal degree in co-relation 38897. Up to 3962 conditions per place. [2024-06-20 15:31:09,329 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 506 selfloop transitions, 93 changer transitions 0/607 dead transitions. [2024-06-20 15:31:09,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 607 transitions, 12543 flow [2024-06-20 15:31:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:31:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:31:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:31:09,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 15:31:09,329 INFO L175 Difference]: Start difference. First operand has 436 places, 581 transitions, 11247 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:31:09,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 607 transitions, 12543 flow [2024-06-20 15:31:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 607 transitions, 12379 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:31:14,228 INFO L231 Difference]: Finished difference. Result has 440 places, 583 transitions, 11298 flow [2024-06-20 15:31:14,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11083, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11298, PETRI_PLACES=440, PETRI_TRANSITIONS=583} [2024-06-20 15:31:14,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-20 15:31:14,229 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 583 transitions, 11298 flow [2024-06-20 15:31:14,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:31:14,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:14,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:14,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:31:14,229 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:14,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:14,230 INFO L85 PathProgramCache]: Analyzing trace with hash -965711339, now seen corresponding path program 1 times [2024-06-20 15:31:14,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:14,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748696970] [2024-06-20 15:31:14,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:14,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:14,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:14,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748696970] [2024-06-20 15:31:14,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748696970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:14,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:14,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:14,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616499237] [2024-06-20 15:31:14,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:14,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:14,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:14,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:14,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:14,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:14,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 583 transitions, 11298 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:31:14,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:14,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:14,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:15,373 INFO L124 PetriNetUnfolderBase]: 2717/4624 cut-off events. [2024-06-20 15:31:15,373 INFO L125 PetriNetUnfolderBase]: For 691768/691776 co-relation queries the response was YES. [2024-06-20 15:31:15,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39360 conditions, 4624 events. 2717/4624 cut-off events. For 691768/691776 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 30454 event pairs, 475 based on Foata normal form. 3/4622 useless extension candidates. Maximal degree in co-relation 39158. Up to 3836 conditions per place. [2024-06-20 15:31:15,448 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 188 changer transitions 0/609 dead transitions. [2024-06-20 15:31:15,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 609 transitions, 12644 flow [2024-06-20 15:31:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:31:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:31:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:31:15,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:31:15,452 INFO L175 Difference]: Start difference. First operand has 440 places, 583 transitions, 11298 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:31:15,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 609 transitions, 12644 flow [2024-06-20 15:31:20,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 609 transitions, 12464 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:31:20,161 INFO L231 Difference]: Finished difference. Result has 443 places, 585 transitions, 11569 flow [2024-06-20 15:31:20,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11118, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11569, PETRI_PLACES=443, PETRI_TRANSITIONS=585} [2024-06-20 15:31:20,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-20 15:31:20,162 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 585 transitions, 11569 flow [2024-06-20 15:31:20,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:31:20,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:20,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:20,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:31:20,163 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:20,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash -800256903, now seen corresponding path program 4 times [2024-06-20 15:31:20,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:20,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209369894] [2024-06-20 15:31:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:20,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:20,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209369894] [2024-06-20 15:31:20,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209369894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:20,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:20,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:20,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356833730] [2024-06-20 15:31:20,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:20,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:20,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:20,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:20,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:20,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:20,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 585 transitions, 11569 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:20,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:20,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:20,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:21,429 INFO L124 PetriNetUnfolderBase]: 2753/4686 cut-off events. [2024-06-20 15:31:21,429 INFO L125 PetriNetUnfolderBase]: For 699988/699990 co-relation queries the response was YES. [2024-06-20 15:31:21,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39971 conditions, 4686 events. 2753/4686 cut-off events. For 699988/699990 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 30924 event pairs, 451 based on Foata normal form. 2/4686 useless extension candidates. Maximal degree in co-relation 39768. Up to 4108 conditions per place. [2024-06-20 15:31:21,498 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 561 selfloop transitions, 41 changer transitions 0/610 dead transitions. [2024-06-20 15:31:21,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 610 transitions, 12890 flow [2024-06-20 15:31:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:31:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:31:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:31:21,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:31:21,499 INFO L175 Difference]: Start difference. First operand has 443 places, 585 transitions, 11569 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:31:21,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 610 transitions, 12890 flow [2024-06-20 15:31:26,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 610 transitions, 12471 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 15:31:26,034 INFO L231 Difference]: Finished difference. Result has 445 places, 588 transitions, 11279 flow [2024-06-20 15:31:26,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11150, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11279, PETRI_PLACES=445, PETRI_TRANSITIONS=588} [2024-06-20 15:31:26,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-20 15:31:26,034 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 588 transitions, 11279 flow [2024-06-20 15:31:26,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:26,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:26,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:26,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:31:26,035 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:26,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash -881948191, now seen corresponding path program 2 times [2024-06-20 15:31:26,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:26,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518414707] [2024-06-20 15:31:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:26,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:26,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518414707] [2024-06-20 15:31:26,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518414707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:26,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:26,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:26,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387679775] [2024-06-20 15:31:26,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:26,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:26,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:26,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:26,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:26,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 588 transitions, 11279 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:31:26,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:26,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:26,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:27,174 INFO L124 PetriNetUnfolderBase]: 2789/4742 cut-off events. [2024-06-20 15:31:27,174 INFO L125 PetriNetUnfolderBase]: For 776453/776455 co-relation queries the response was YES. [2024-06-20 15:31:27,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40383 conditions, 4742 events. 2789/4742 cut-off events. For 776453/776455 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 31290 event pairs, 456 based on Foata normal form. 10/4750 useless extension candidates. Maximal degree in co-relation 40179. Up to 4106 conditions per place. [2024-06-20 15:31:27,250 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 527 selfloop transitions, 78 changer transitions 0/613 dead transitions. [2024-06-20 15:31:27,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 613 transitions, 12649 flow [2024-06-20 15:31:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:31:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:31:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-20 15:31:27,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-20 15:31:27,250 INFO L175 Difference]: Start difference. First operand has 445 places, 588 transitions, 11279 flow. Second operand 9 states and 213 transitions. [2024-06-20 15:31:27,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 613 transitions, 12649 flow [2024-06-20 15:31:30,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 613 transitions, 12557 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:31:30,894 INFO L231 Difference]: Finished difference. Result has 448 places, 590 transitions, 11424 flow [2024-06-20 15:31:30,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11187, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11424, PETRI_PLACES=448, PETRI_TRANSITIONS=590} [2024-06-20 15:31:30,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-20 15:31:30,894 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 590 transitions, 11424 flow [2024-06-20 15:31:30,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:31:30,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:30,895 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] [2024-06-20 15:31:30,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:31:30,895 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:30,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:30,895 INFO L85 PathProgramCache]: Analyzing trace with hash -36619739, now seen corresponding path program 3 times [2024-06-20 15:31:30,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:30,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108179986] [2024-06-20 15:31:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:30,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:31,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:31,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108179986] [2024-06-20 15:31:31,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108179986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:31,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:31,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:31,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716006305] [2024-06-20 15:31:31,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:31,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:31,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:31,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:31,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:31,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 590 transitions, 11424 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:31:31,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:31,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:31,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:32,061 INFO L124 PetriNetUnfolderBase]: 2825/4796 cut-off events. [2024-06-20 15:31:32,061 INFO L125 PetriNetUnfolderBase]: For 796091/796093 co-relation queries the response was YES. [2024-06-20 15:31:32,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41360 conditions, 4796 events. 2825/4796 cut-off events. For 796091/796093 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31655 event pairs, 462 based on Foata normal form. 10/4804 useless extension candidates. Maximal degree in co-relation 41155. Up to 4162 conditions per place. [2024-06-20 15:31:32,137 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 530 selfloop transitions, 78 changer transitions 0/616 dead transitions. [2024-06-20 15:31:32,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 616 transitions, 12806 flow [2024-06-20 15:31:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:31:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:31:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-20 15:31:32,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-20 15:31:32,138 INFO L175 Difference]: Start difference. First operand has 448 places, 590 transitions, 11424 flow. Second operand 10 states and 232 transitions. [2024-06-20 15:31:32,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 616 transitions, 12806 flow [2024-06-20 15:31:36,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 616 transitions, 12595 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 15:31:37,007 INFO L231 Difference]: Finished difference. Result has 451 places, 592 transitions, 11454 flow [2024-06-20 15:31:37,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11213, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11454, PETRI_PLACES=451, PETRI_TRANSITIONS=592} [2024-06-20 15:31:37,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-20 15:31:37,007 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 592 transitions, 11454 flow [2024-06-20 15:31:37,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:31:37,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:37,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:37,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:31:37,008 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:37,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1547344073, now seen corresponding path program 4 times [2024-06-20 15:31:37,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:37,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283495859] [2024-06-20 15:31:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:37,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:37,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:37,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283495859] [2024-06-20 15:31:37,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283495859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:37,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:37,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:37,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527274962] [2024-06-20 15:31:37,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:37,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:37,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:37,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:37,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:37,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:37,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 592 transitions, 11454 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:31:37,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:37,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:37,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:38,264 INFO L124 PetriNetUnfolderBase]: 3034/5141 cut-off events. [2024-06-20 15:31:38,264 INFO L125 PetriNetUnfolderBase]: For 1064436/1064438 co-relation queries the response was YES. [2024-06-20 15:31:38,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47385 conditions, 5141 events. 3034/5141 cut-off events. For 1064436/1064438 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34099 event pairs, 559 based on Foata normal form. 10/5149 useless extension candidates. Maximal degree in co-relation 47179. Up to 3986 conditions per place. [2024-06-20 15:31:38,350 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 82 changer transitions 0/627 dead transitions. [2024-06-20 15:31:38,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 627 transitions, 13198 flow [2024-06-20 15:31:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:31:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:31:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-20 15:31:38,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-20 15:31:38,351 INFO L175 Difference]: Start difference. First operand has 451 places, 592 transitions, 11454 flow. Second operand 10 states and 238 transitions. [2024-06-20 15:31:38,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 627 transitions, 13198 flow [2024-06-20 15:31:44,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 627 transitions, 12983 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-20 15:31:44,164 INFO L231 Difference]: Finished difference. Result has 454 places, 596 transitions, 11556 flow [2024-06-20 15:31:44,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11239, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11556, PETRI_PLACES=454, PETRI_TRANSITIONS=596} [2024-06-20 15:31:44,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-20 15:31:44,164 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 596 transitions, 11556 flow [2024-06-20 15:31:44,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:31:44,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:44,165 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] [2024-06-20 15:31:44,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:31:44,165 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:44,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:44,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1585735447, now seen corresponding path program 11 times [2024-06-20 15:31:44,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:44,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580531463] [2024-06-20 15:31:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:44,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:44,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580531463] [2024-06-20 15:31:44,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580531463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:44,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:44,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:44,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116075466] [2024-06-20 15:31:44,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:44,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:44,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:44,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:44,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 596 transitions, 11556 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:44,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:44,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:44,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:45,388 INFO L124 PetriNetUnfolderBase]: 3039/5131 cut-off events. [2024-06-20 15:31:45,388 INFO L125 PetriNetUnfolderBase]: For 1031829/1031835 co-relation queries the response was YES. [2024-06-20 15:31:45,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47300 conditions, 5131 events. 3039/5131 cut-off events. For 1031829/1031835 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 34016 event pairs, 623 based on Foata normal form. 5/5117 useless extension candidates. Maximal degree in co-relation 47092. Up to 4172 conditions per place. [2024-06-20 15:31:45,475 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 402 selfloop transitions, 212 changer transitions 0/622 dead transitions. [2024-06-20 15:31:45,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 622 transitions, 13439 flow [2024-06-20 15:31:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:31:45,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:31:45,476 INFO L175 Difference]: Start difference. First operand has 454 places, 596 transitions, 11556 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:31:45,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 622 transitions, 13439 flow [2024-06-20 15:31:52,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 622 transitions, 13274 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 15:31:52,267 INFO L231 Difference]: Finished difference. Result has 455 places, 599 transitions, 11891 flow [2024-06-20 15:31:52,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11391, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11891, PETRI_PLACES=455, PETRI_TRANSITIONS=599} [2024-06-20 15:31:52,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-20 15:31:52,268 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 599 transitions, 11891 flow [2024-06-20 15:31:52,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:52,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:52,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:52,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:31:52,268 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:52,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:52,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1012634751, now seen corresponding path program 12 times [2024-06-20 15:31:52,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:52,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179334279] [2024-06-20 15:31:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:52,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:52,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:52,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179334279] [2024-06-20 15:31:52,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179334279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:52,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:52,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:52,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644234143] [2024-06-20 15:31:52,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:52,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:52,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:52,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:52,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:52,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:52,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 599 transitions, 11891 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:52,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:52,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:52,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:53,526 INFO L124 PetriNetUnfolderBase]: 3044/5156 cut-off events. [2024-06-20 15:31:53,526 INFO L125 PetriNetUnfolderBase]: For 1042348/1042354 co-relation queries the response was YES. [2024-06-20 15:31:53,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47443 conditions, 5156 events. 3044/5156 cut-off events. For 1042348/1042354 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34305 event pairs, 635 based on Foata normal form. 5/5142 useless extension candidates. Maximal degree in co-relation 47233. Up to 4178 conditions per place. [2024-06-20 15:31:53,610 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 402 selfloop transitions, 212 changer transitions 0/622 dead transitions. [2024-06-20 15:31:53,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 622 transitions, 13772 flow [2024-06-20 15:31:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:53,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:31:53,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:31:53,611 INFO L175 Difference]: Start difference. First operand has 455 places, 599 transitions, 11891 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:31:53,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 622 transitions, 13772 flow [2024-06-20 15:32:00,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 622 transitions, 12987 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 15:32:00,193 INFO L231 Difference]: Finished difference. Result has 456 places, 602 transitions, 11611 flow [2024-06-20 15:32:00,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11137, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11611, PETRI_PLACES=456, PETRI_TRANSITIONS=602} [2024-06-20 15:32:00,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-20 15:32:00,194 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 602 transitions, 11611 flow [2024-06-20 15:32:00,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:00,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:00,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:00,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:32:00,194 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:00,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1171247207, now seen corresponding path program 13 times [2024-06-20 15:32:00,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:00,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810353011] [2024-06-20 15:32:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:00,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:00,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:00,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810353011] [2024-06-20 15:32:00,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810353011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:00,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:00,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:32:00,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405340074] [2024-06-20 15:32:00,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:00,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:32:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:32:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:32:00,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:00,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 602 transitions, 11611 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:00,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:00,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:00,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:01,496 INFO L124 PetriNetUnfolderBase]: 3049/5167 cut-off events. [2024-06-20 15:32:01,496 INFO L125 PetriNetUnfolderBase]: For 1049965/1049971 co-relation queries the response was YES. [2024-06-20 15:32:01,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47398 conditions, 5167 events. 3049/5167 cut-off events. For 1049965/1049971 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 34428 event pairs, 635 based on Foata normal form. 5/5153 useless extension candidates. Maximal degree in co-relation 47188. Up to 4184 conditions per place. [2024-06-20 15:32:01,576 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 386 selfloop transitions, 228 changer transitions 0/622 dead transitions. [2024-06-20 15:32:01,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 622 transitions, 13459 flow [2024-06-20 15:32:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:32:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:32:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:32:01,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:32:01,577 INFO L175 Difference]: Start difference. First operand has 456 places, 602 transitions, 11611 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:32:01,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 622 transitions, 13459 flow [2024-06-20 15:32:07,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 622 transitions, 13048 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:32:07,506 INFO L231 Difference]: Finished difference. Result has 459 places, 605 transitions, 11712 flow [2024-06-20 15:32:07,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11203, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11712, PETRI_PLACES=459, PETRI_TRANSITIONS=605} [2024-06-20 15:32:07,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-20 15:32:07,507 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 605 transitions, 11712 flow [2024-06-20 15:32:07,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:07,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:07,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:07,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:32:07,507 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:07,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:07,508 INFO L85 PathProgramCache]: Analyzing trace with hash -513686907, now seen corresponding path program 14 times [2024-06-20 15:32:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:07,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658867146] [2024-06-20 15:32:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:07,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:07,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658867146] [2024-06-20 15:32:07,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658867146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:07,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:07,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:07,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640655996] [2024-06-20 15:32:07,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:07,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:07,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:07,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:07,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:07,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 605 transitions, 11712 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:07,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:07,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:07,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:08,855 INFO L124 PetriNetUnfolderBase]: 3046/5144 cut-off events. [2024-06-20 15:32:08,855 INFO L125 PetriNetUnfolderBase]: For 1054171/1054171 co-relation queries the response was YES. [2024-06-20 15:32:08,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47359 conditions, 5144 events. 3046/5144 cut-off events. For 1054171/1054171 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 34147 event pairs, 653 based on Foata normal form. 1/5108 useless extension candidates. Maximal degree in co-relation 47148. Up to 4181 conditions per place. [2024-06-20 15:32:08,932 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 226 changer transitions 0/632 dead transitions. [2024-06-20 15:32:08,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 632 transitions, 13572 flow [2024-06-20 15:32:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:32:08,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:32:08,933 INFO L175 Difference]: Start difference. First operand has 459 places, 605 transitions, 11712 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:32:08,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 632 transitions, 13572 flow [2024-06-20 15:32:15,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 632 transitions, 13249 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:32:15,017 INFO L231 Difference]: Finished difference. Result has 463 places, 605 transitions, 11849 flow [2024-06-20 15:32:15,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11389, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11849, PETRI_PLACES=463, PETRI_TRANSITIONS=605} [2024-06-20 15:32:15,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-20 15:32:15,017 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 605 transitions, 11849 flow [2024-06-20 15:32:15,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:15,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:15,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:15,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:32:15,018 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:15,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:15,018 INFO L85 PathProgramCache]: Analyzing trace with hash 547036197, now seen corresponding path program 8 times [2024-06-20 15:32:15,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:15,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679796196] [2024-06-20 15:32:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:15,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:15,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:15,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679796196] [2024-06-20 15:32:15,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679796196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:15,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:15,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:15,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951991382] [2024-06-20 15:32:15,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:15,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:15,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:15,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:15,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:15,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:15,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 605 transitions, 11849 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:15,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:15,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:15,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:16,371 INFO L124 PetriNetUnfolderBase]: 3051/5132 cut-off events. [2024-06-20 15:32:16,372 INFO L125 PetriNetUnfolderBase]: For 1074101/1074101 co-relation queries the response was YES. [2024-06-20 15:32:16,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47666 conditions, 5132 events. 3051/5132 cut-off events. For 1074101/1074101 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33894 event pairs, 687 based on Foata normal form. 1/5084 useless extension candidates. Maximal degree in co-relation 47454. Up to 3824 conditions per place. [2024-06-20 15:32:16,454 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 338 changer transitions 0/636 dead transitions. [2024-06-20 15:32:16,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 636 transitions, 14183 flow [2024-06-20 15:32:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:32:16,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:32:16,455 INFO L175 Difference]: Start difference. First operand has 463 places, 605 transitions, 11849 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:32:16,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 636 transitions, 14183 flow [2024-06-20 15:32:22,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 636 transitions, 13346 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-20 15:32:22,442 INFO L231 Difference]: Finished difference. Result has 461 places, 611 transitions, 11904 flow [2024-06-20 15:32:22,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11012, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11904, PETRI_PLACES=461, PETRI_TRANSITIONS=611} [2024-06-20 15:32:22,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-20 15:32:22,443 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 611 transitions, 11904 flow [2024-06-20 15:32:22,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:22,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:22,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:22,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:32:22,443 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:22,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2135945275, now seen corresponding path program 15 times [2024-06-20 15:32:22,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:22,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932062430] [2024-06-20 15:32:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:22,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:22,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:22,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932062430] [2024-06-20 15:32:22,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932062430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:22,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:22,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:22,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388407768] [2024-06-20 15:32:22,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:22,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:22,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:22,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:22,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:22,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 611 transitions, 11904 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:22,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:22,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:22,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:23,873 INFO L124 PetriNetUnfolderBase]: 3056/5154 cut-off events. [2024-06-20 15:32:23,873 INFO L125 PetriNetUnfolderBase]: For 1084505/1084505 co-relation queries the response was YES. [2024-06-20 15:32:23,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47714 conditions, 5154 events. 3056/5154 cut-off events. For 1084505/1084505 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 34184 event pairs, 657 based on Foata normal form. 1/5111 useless extension candidates. Maximal degree in co-relation 47503. Up to 4194 conditions per place. [2024-06-20 15:32:23,951 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 401 selfloop transitions, 228 changer transitions 0/637 dead transitions. [2024-06-20 15:32:23,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 637 transitions, 13553 flow [2024-06-20 15:32:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:32:23,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:32:23,952 INFO L175 Difference]: Start difference. First operand has 461 places, 611 transitions, 11904 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:32:23,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 637 transitions, 13553 flow [2024-06-20 15:32:30,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 637 transitions, 13009 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-20 15:32:30,098 INFO L231 Difference]: Finished difference. Result has 463 places, 614 transitions, 11873 flow [2024-06-20 15:32:30,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11360, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11873, PETRI_PLACES=463, PETRI_TRANSITIONS=614} [2024-06-20 15:32:30,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-20 15:32:30,099 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 614 transitions, 11873 flow [2024-06-20 15:32:30,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:30,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:30,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:30,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:32:30,100 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:30,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1150937097, now seen corresponding path program 9 times [2024-06-20 15:32:30,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:30,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445016893] [2024-06-20 15:32:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:30,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:30,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:30,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445016893] [2024-06-20 15:32:30,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445016893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:30,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:30,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:30,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965783652] [2024-06-20 15:32:30,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:30,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:30,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:30,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:30,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 614 transitions, 11873 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:30,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:30,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:30,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:31,439 INFO L124 PetriNetUnfolderBase]: 3069/5174 cut-off events. [2024-06-20 15:32:31,439 INFO L125 PetriNetUnfolderBase]: For 1108773/1108773 co-relation queries the response was YES. [2024-06-20 15:32:31,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47878 conditions, 5174 events. 3069/5174 cut-off events. For 1108773/1108773 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34300 event pairs, 698 based on Foata normal form. 1/5125 useless extension candidates. Maximal degree in co-relation 47667. Up to 3838 conditions per place. [2024-06-20 15:32:31,519 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 340 changer transitions 0/643 dead transitions. [2024-06-20 15:32:31,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 643 transitions, 14431 flow [2024-06-20 15:32:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:31,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:32:31,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:32:31,520 INFO L175 Difference]: Start difference. First operand has 463 places, 614 transitions, 11873 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:32:31,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 643 transitions, 14431 flow [2024-06-20 15:32:39,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 643 transitions, 14141 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:32:39,167 INFO L231 Difference]: Finished difference. Result has 466 places, 620 transitions, 12417 flow [2024-06-20 15:32:39,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11583, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12417, PETRI_PLACES=466, PETRI_TRANSITIONS=620} [2024-06-20 15:32:39,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-20 15:32:39,168 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 620 transitions, 12417 flow [2024-06-20 15:32:39,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:39,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:39,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:32:39,169 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:39,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:39,169 INFO L85 PathProgramCache]: Analyzing trace with hash -681981893, now seen corresponding path program 16 times [2024-06-20 15:32:39,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:39,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387104261] [2024-06-20 15:32:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:39,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:39,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:39,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387104261] [2024-06-20 15:32:39,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387104261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:39,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:39,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:39,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198444888] [2024-06-20 15:32:39,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:39,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:39,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:39,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:39,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:39,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:39,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 620 transitions, 12417 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:39,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:39,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:39,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:40,592 INFO L124 PetriNetUnfolderBase]: 3074/5184 cut-off events. [2024-06-20 15:32:40,592 INFO L125 PetriNetUnfolderBase]: For 1130050/1130050 co-relation queries the response was YES. [2024-06-20 15:32:40,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48369 conditions, 5184 events. 3074/5184 cut-off events. For 1130050/1130050 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34416 event pairs, 658 based on Foata normal form. 1/5140 useless extension candidates. Maximal degree in co-relation 48156. Up to 4218 conditions per place. [2024-06-20 15:32:40,671 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 229 changer transitions 0/643 dead transitions. [2024-06-20 15:32:40,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 643 transitions, 14077 flow [2024-06-20 15:32:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:40,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:32:40,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-20 15:32:40,672 INFO L175 Difference]: Start difference. First operand has 466 places, 620 transitions, 12417 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:32:40,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 643 transitions, 14077 flow [2024-06-20 15:32:47,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 643 transitions, 13379 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 15:32:47,933 INFO L231 Difference]: Finished difference. Result has 470 places, 623 transitions, 12241 flow [2024-06-20 15:32:47,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11723, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12241, PETRI_PLACES=470, PETRI_TRANSITIONS=623} [2024-06-20 15:32:47,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-20 15:32:47,934 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 623 transitions, 12241 flow [2024-06-20 15:32:47,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:47,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:47,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:32:47,934 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:47,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash -676654853, now seen corresponding path program 17 times [2024-06-20 15:32:47,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:47,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107771684] [2024-06-20 15:32:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:47,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:48,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:48,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107771684] [2024-06-20 15:32:48,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107771684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:48,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:48,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:48,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530118022] [2024-06-20 15:32:48,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:48,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:48,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:48,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:48,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:48,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 623 transitions, 12241 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:48,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:48,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:48,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:49,492 INFO L124 PetriNetUnfolderBase]: 3079/5187 cut-off events. [2024-06-20 15:32:49,492 INFO L125 PetriNetUnfolderBase]: For 1143965/1143965 co-relation queries the response was YES. [2024-06-20 15:32:49,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48268 conditions, 5187 events. 3079/5187 cut-off events. For 1143965/1143965 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34412 event pairs, 648 based on Foata normal form. 1/5145 useless extension candidates. Maximal degree in co-relation 48054. Up to 4224 conditions per place. [2024-06-20 15:32:49,570 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 232 changer transitions 0/646 dead transitions. [2024-06-20 15:32:49,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 646 transitions, 13911 flow [2024-06-20 15:32:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:32:49,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-20 15:32:49,571 INFO L175 Difference]: Start difference. First operand has 470 places, 623 transitions, 12241 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:32:49,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 646 transitions, 13911 flow [2024-06-20 15:32:55,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 646 transitions, 13621 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:32:55,293 INFO L231 Difference]: Finished difference. Result has 473 places, 626 transitions, 12481 flow [2024-06-20 15:32:55,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11954, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12481, PETRI_PLACES=473, PETRI_TRANSITIONS=626} [2024-06-20 15:32:55,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 15:32:55,294 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 626 transitions, 12481 flow [2024-06-20 15:32:55,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:55,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:55,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:55,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:32:55,295 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:55,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:55,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1151323047, now seen corresponding path program 10 times [2024-06-20 15:32:55,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:55,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447766714] [2024-06-20 15:32:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:55,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:55,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:55,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447766714] [2024-06-20 15:32:55,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447766714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:55,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:55,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:55,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195404594] [2024-06-20 15:32:55,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:55,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:55,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:55,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:55,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:55,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:55,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 626 transitions, 12481 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:32:55,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:55,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:55,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:56,765 INFO L124 PetriNetUnfolderBase]: 3076/5185 cut-off events. [2024-06-20 15:32:56,765 INFO L125 PetriNetUnfolderBase]: For 1155667/1155667 co-relation queries the response was YES. [2024-06-20 15:32:56,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48285 conditions, 5185 events. 3076/5185 cut-off events. For 1155667/1155667 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34399 event pairs, 700 based on Foata normal form. 1/5135 useless extension candidates. Maximal degree in co-relation 48069. Up to 3844 conditions per place. [2024-06-20 15:32:56,847 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 345 changer transitions 0/648 dead transitions. [2024-06-20 15:32:56,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 648 transitions, 14649 flow [2024-06-20 15:32:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:32:56,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-20 15:32:56,848 INFO L175 Difference]: Start difference. First operand has 473 places, 626 transitions, 12481 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:32:56,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 648 transitions, 14649 flow [2024-06-20 15:33:03,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 648 transitions, 13931 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 15:33:03,356 INFO L231 Difference]: Finished difference. Result has 474 places, 626 transitions, 12459 flow [2024-06-20 15:33:03,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11763, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12459, PETRI_PLACES=474, PETRI_TRANSITIONS=626} [2024-06-20 15:33:03,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-20 15:33:03,357 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 626 transitions, 12459 flow [2024-06-20 15:33:03,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:03,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:03,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:03,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:33:03,357 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:03,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:03,357 INFO L85 PathProgramCache]: Analyzing trace with hash 642647433, now seen corresponding path program 11 times [2024-06-20 15:33:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:03,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857775239] [2024-06-20 15:33:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:03,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:03,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:03,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857775239] [2024-06-20 15:33:03,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857775239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:03,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:03,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:03,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403044640] [2024-06-20 15:33:03,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:03,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:03,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:03,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:03,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 626 transitions, 12459 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:03,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:03,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:03,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:04,810 INFO L124 PetriNetUnfolderBase]: 3081/5209 cut-off events. [2024-06-20 15:33:04,810 INFO L125 PetriNetUnfolderBase]: For 1165953/1165963 co-relation queries the response was YES. [2024-06-20 15:33:04,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48597 conditions, 5209 events. 3081/5209 cut-off events. For 1165953/1165963 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34673 event pairs, 595 based on Foata normal form. 1/5204 useless extension candidates. Maximal degree in co-relation 48381. Up to 4670 conditions per place. [2024-06-20 15:33:04,890 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 588 selfloop transitions, 48 changer transitions 0/644 dead transitions. [2024-06-20 15:33:04,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 644 transitions, 13856 flow [2024-06-20 15:33:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:33:04,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-20 15:33:04,890 INFO L175 Difference]: Start difference. First operand has 474 places, 626 transitions, 12459 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:33:04,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 644 transitions, 13856 flow [2024-06-20 15:33:12,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 644 transitions, 13187 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:33:12,204 INFO L231 Difference]: Finished difference. Result has 476 places, 629 transitions, 11981 flow [2024-06-20 15:33:12,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11793, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11981, PETRI_PLACES=476, PETRI_TRANSITIONS=629} [2024-06-20 15:33:12,204 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-20 15:33:12,204 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 629 transitions, 11981 flow [2024-06-20 15:33:12,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:12,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:12,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:12,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:33:12,205 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:12,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1067090037, now seen corresponding path program 18 times [2024-06-20 15:33:12,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:12,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65245230] [2024-06-20 15:33:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:12,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:12,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:12,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65245230] [2024-06-20 15:33:12,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65245230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:12,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:12,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:12,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856401606] [2024-06-20 15:33:12,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:12,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:12,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:12,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:12,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:12,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:12,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 629 transitions, 11981 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:12,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:12,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:12,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:13,608 INFO L124 PetriNetUnfolderBase]: 3078/5204 cut-off events. [2024-06-20 15:33:13,608 INFO L125 PetriNetUnfolderBase]: For 1166670/1166670 co-relation queries the response was YES. [2024-06-20 15:33:13,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47805 conditions, 5204 events. 3078/5204 cut-off events. For 1166670/1166670 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34678 event pairs, 647 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 47588. Up to 4224 conditions per place. [2024-06-20 15:33:13,700 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 238 changer transitions 0/650 dead transitions. [2024-06-20 15:33:13,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 650 transitions, 14157 flow [2024-06-20 15:33:13,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:33:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:33:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:33:13,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-20 15:33:13,701 INFO L175 Difference]: Start difference. First operand has 476 places, 629 transitions, 11981 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:33:13,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 650 transitions, 14157 flow [2024-06-20 15:33:22,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 650 transitions, 14020 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 15:33:22,071 INFO L231 Difference]: Finished difference. Result has 481 places, 629 transitions, 12326 flow [2024-06-20 15:33:22,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11844, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12326, PETRI_PLACES=481, PETRI_TRANSITIONS=629} [2024-06-20 15:33:22,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-20 15:33:22,071 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 629 transitions, 12326 flow [2024-06-20 15:33:22,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:22,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:22,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:22,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:33:22,072 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:22,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash 601482151, now seen corresponding path program 12 times [2024-06-20 15:33:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:22,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813129819] [2024-06-20 15:33:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:22,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:22,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:22,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813129819] [2024-06-20 15:33:22,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813129819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:22,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:22,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:22,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587286517] [2024-06-20 15:33:22,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:22,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:22,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:22,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:22,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 629 transitions, 12326 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:22,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:22,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:22,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:23,455 INFO L124 PetriNetUnfolderBase]: 3091/5218 cut-off events. [2024-06-20 15:33:23,455 INFO L125 PetriNetUnfolderBase]: For 1198690/1198690 co-relation queries the response was YES. [2024-06-20 15:33:23,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48759 conditions, 5218 events. 3091/5218 cut-off events. For 1198690/1198690 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34743 event pairs, 702 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 48541. Up to 3856 conditions per place. [2024-06-20 15:33:23,541 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 357 changer transitions 0/654 dead transitions. [2024-06-20 15:33:23,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 654 transitions, 14684 flow [2024-06-20 15:33:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:33:23,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:33:23,542 INFO L175 Difference]: Start difference. First operand has 481 places, 629 transitions, 12326 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:33:23,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 654 transitions, 14684 flow [2024-06-20 15:33:30,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 654 transitions, 13589 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-20 15:33:30,502 INFO L231 Difference]: Finished difference. Result has 479 places, 635 transitions, 12123 flow [2024-06-20 15:33:30,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11231, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12123, PETRI_PLACES=479, PETRI_TRANSITIONS=635} [2024-06-20 15:33:30,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-20 15:33:30,503 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 635 transitions, 12123 flow [2024-06-20 15:33:30,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:30,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:30,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:33:30,504 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:30,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash 890896651, now seen corresponding path program 19 times [2024-06-20 15:33:30,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:30,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005857174] [2024-06-20 15:33:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:30,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:30,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005857174] [2024-06-20 15:33:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005857174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:30,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:30,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:30,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109587764] [2024-06-20 15:33:30,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:30,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:30,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:30,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:30,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 635 transitions, 12123 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:30,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:30,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:30,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:31,820 INFO L124 PetriNetUnfolderBase]: 3088/5222 cut-off events. [2024-06-20 15:33:31,820 INFO L125 PetriNetUnfolderBase]: For 1192825/1192825 co-relation queries the response was YES. [2024-06-20 15:33:31,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48442 conditions, 5222 events. 3088/5222 cut-off events. For 1192825/1192825 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34865 event pairs, 647 based on Foata normal form. 1/5186 useless extension candidates. Maximal degree in co-relation 48225. Up to 4239 conditions per place. [2024-06-20 15:33:31,902 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 408 selfloop transitions, 237 changer transitions 0/653 dead transitions. [2024-06-20 15:33:31,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 653 transitions, 14029 flow [2024-06-20 15:33:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:33:31,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 15:33:31,903 INFO L175 Difference]: Start difference. First operand has 479 places, 635 transitions, 12123 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:33:31,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 653 transitions, 14029 flow [2024-06-20 15:33:40,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 653 transitions, 13360 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 15:33:40,020 INFO L231 Difference]: Finished difference. Result has 483 places, 635 transitions, 11934 flow [2024-06-20 15:33:40,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11454, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11934, PETRI_PLACES=483, PETRI_TRANSITIONS=635} [2024-06-20 15:33:40,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-20 15:33:40,021 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 635 transitions, 11934 flow [2024-06-20 15:33:40,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:40,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:40,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:33:40,022 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:40,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash 601096015, now seen corresponding path program 20 times [2024-06-20 15:33:40,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:40,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211377888] [2024-06-20 15:33:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:40,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:40,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:40,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211377888] [2024-06-20 15:33:40,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211377888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:40,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:40,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:40,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869534493] [2024-06-20 15:33:40,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:40,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:40,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:40,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:40,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:40,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:40,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 635 transitions, 11934 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:40,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:40,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:40,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:41,404 INFO L124 PetriNetUnfolderBase]: 3085/5206 cut-off events. [2024-06-20 15:33:41,404 INFO L125 PetriNetUnfolderBase]: For 1197711/1197711 co-relation queries the response was YES. [2024-06-20 15:33:41,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48105 conditions, 5206 events. 3085/5206 cut-off events. For 1197711/1197711 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34617 event pairs, 659 based on Foata normal form. 1/5162 useless extension candidates. Maximal degree in co-relation 47887. Up to 4236 conditions per place. [2024-06-20 15:33:41,494 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 237 changer transitions 0/652 dead transitions. [2024-06-20 15:33:41,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 652 transitions, 13556 flow [2024-06-20 15:33:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:33:41,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-20 15:33:41,495 INFO L175 Difference]: Start difference. First operand has 483 places, 635 transitions, 11934 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:33:41,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 652 transitions, 13556 flow [2024-06-20 15:33:48,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 652 transitions, 13076 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:33:48,836 INFO L231 Difference]: Finished difference. Result has 484 places, 635 transitions, 11934 flow [2024-06-20 15:33:48,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11454, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11934, PETRI_PLACES=484, PETRI_TRANSITIONS=635} [2024-06-20 15:33:48,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-20 15:33:48,836 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 635 transitions, 11934 flow [2024-06-20 15:33:48,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:48,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:48,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:48,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:33:48,837 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:48,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:48,837 INFO L85 PathProgramCache]: Analyzing trace with hash 601096201, now seen corresponding path program 13 times [2024-06-20 15:33:48,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:48,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538464990] [2024-06-20 15:33:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:48,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:48,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:48,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538464990] [2024-06-20 15:33:48,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538464990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:48,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:48,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:48,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207816037] [2024-06-20 15:33:48,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:48,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:48,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:48,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:48,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:48,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:48,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 635 transitions, 11934 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:48,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:48,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:48,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:50,190 INFO L124 PetriNetUnfolderBase]: 3082/5203 cut-off events. [2024-06-20 15:33:50,191 INFO L125 PetriNetUnfolderBase]: For 1203496/1203496 co-relation queries the response was YES. [2024-06-20 15:33:50,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48033 conditions, 5203 events. 3082/5203 cut-off events. For 1203496/1203496 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34638 event pairs, 700 based on Foata normal form. 1/5153 useless extension candidates. Maximal degree in co-relation 47814. Up to 3850 conditions per place. [2024-06-20 15:33:50,281 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 358 changer transitions 0/653 dead transitions. [2024-06-20 15:33:50,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 653 transitions, 13848 flow [2024-06-20 15:33:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:33:50,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:33:50,282 INFO L175 Difference]: Start difference. First operand has 484 places, 635 transitions, 11934 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:33:50,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 653 transitions, 13848 flow [2024-06-20 15:33:57,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 653 transitions, 13314 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 15:33:57,646 INFO L231 Difference]: Finished difference. Result has 485 places, 635 transitions, 12122 flow [2024-06-20 15:33:57,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11400, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12122, PETRI_PLACES=485, PETRI_TRANSITIONS=635} [2024-06-20 15:33:57,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-20 15:33:57,647 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 635 transitions, 12122 flow [2024-06-20 15:33:57,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:57,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:57,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:57,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:33:57,648 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:57,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash 829620863, now seen corresponding path program 14 times [2024-06-20 15:33:57,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213081643] [2024-06-20 15:33:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:57,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:57,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213081643] [2024-06-20 15:33:57,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213081643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:57,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:57,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:57,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134525121] [2024-06-20 15:33:57,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:57,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:57,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:57,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:57,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:57,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:57,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 635 transitions, 12122 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:33:57,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:57,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:57,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:59,025 INFO L124 PetriNetUnfolderBase]: 3097/5243 cut-off events. [2024-06-20 15:33:59,026 INFO L125 PetriNetUnfolderBase]: For 1220786/1220796 co-relation queries the response was YES. [2024-06-20 15:33:59,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48595 conditions, 5243 events. 3097/5243 cut-off events. For 1220786/1220796 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 35019 event pairs, 582 based on Foata normal form. 1/5242 useless extension candidates. Maximal degree in co-relation 48375. Up to 4711 conditions per place. [2024-06-20 15:33:59,113 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 620 selfloop transitions, 34 changer transitions 0/662 dead transitions. [2024-06-20 15:33:59,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 662 transitions, 13686 flow [2024-06-20 15:33:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:33:59,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-20 15:33:59,114 INFO L175 Difference]: Start difference. First operand has 485 places, 635 transitions, 12122 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:33:59,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 662 transitions, 13686 flow [2024-06-20 15:34:06,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 662 transitions, 12952 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:34:06,454 INFO L231 Difference]: Finished difference. Result has 487 places, 644 transitions, 11682 flow [2024-06-20 15:34:06,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11402, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11682, PETRI_PLACES=487, PETRI_TRANSITIONS=644} [2024-06-20 15:34:06,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-20 15:34:06,455 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 644 transitions, 11682 flow [2024-06-20 15:34:06,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:34:06,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:06,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:06,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:34:06,455 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:06,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash 657845957, now seen corresponding path program 21 times [2024-06-20 15:34:06,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:06,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928601297] [2024-06-20 15:34:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:06,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:06,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:06,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928601297] [2024-06-20 15:34:06,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928601297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:06,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:06,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:34:06,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157761722] [2024-06-20 15:34:06,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:06,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:34:06,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:06,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:34:06,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:34:06,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:34:06,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 644 transitions, 11682 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:06,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:06,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:34:06,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:07,824 INFO L124 PetriNetUnfolderBase]: 3094/5232 cut-off events. [2024-06-20 15:34:07,824 INFO L125 PetriNetUnfolderBase]: For 1217290/1217290 co-relation queries the response was YES. [2024-06-20 15:34:07,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47742 conditions, 5232 events. 3094/5232 cut-off events. For 1217290/1217290 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34953 event pairs, 575 based on Foata normal form. 1/5220 useless extension candidates. Maximal degree in co-relation 47520. Up to 4395 conditions per place. [2024-06-20 15:34:07,915 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 500 selfloop transitions, 162 changer transitions 0/670 dead transitions. [2024-06-20 15:34:07,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 670 transitions, 13384 flow [2024-06-20 15:34:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:34:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:34:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:34:07,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:34:07,916 INFO L175 Difference]: Start difference. First operand has 487 places, 644 transitions, 11682 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:34:07,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 670 transitions, 13384 flow [2024-06-20 15:34:15,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 670 transitions, 13234 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 15:34:15,695 INFO L231 Difference]: Finished difference. Result has 489 places, 644 transitions, 11870 flow [2024-06-20 15:34:15,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11532, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11870, PETRI_PLACES=489, PETRI_TRANSITIONS=644} [2024-06-20 15:34:15,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-20 15:34:15,696 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 644 transitions, 11870 flow [2024-06-20 15:34:15,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:15,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:15,696 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] [2024-06-20 15:34:15,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:34:15,696 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:15,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash -760849701, now seen corresponding path program 15 times [2024-06-20 15:34:15,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:15,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407610045] [2024-06-20 15:34:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:15,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:15,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:15,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407610045] [2024-06-20 15:34:15,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407610045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:15,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:15,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:15,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558272094] [2024-06-20 15:34:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:15,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:15,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:15,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:15,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:34:15,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 644 transitions, 11870 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:34:15,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:15,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:34:15,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:17,099 INFO L124 PetriNetUnfolderBase]: 3131/5315 cut-off events. [2024-06-20 15:34:17,100 INFO L125 PetriNetUnfolderBase]: For 1277925/1277927 co-relation queries the response was YES. [2024-06-20 15:34:17,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49387 conditions, 5315 events. 3131/5315 cut-off events. For 1277925/1277927 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35639 event pairs, 578 based on Foata normal form. 1/5314 useless extension candidates. Maximal degree in co-relation 49164. Up to 4219 conditions per place. [2024-06-20 15:34:17,190 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 250 changer transitions 0/687 dead transitions. [2024-06-20 15:34:17,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 687 transitions, 14281 flow [2024-06-20 15:34:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:34:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:34:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-20 15:34:17,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878048780487805 [2024-06-20 15:34:17,191 INFO L175 Difference]: Start difference. First operand has 489 places, 644 transitions, 11870 flow. Second operand 10 states and 241 transitions. [2024-06-20 15:34:17,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 687 transitions, 14281 flow [2024-06-20 15:34:25,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 687 transitions, 13889 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:34:25,426 INFO L231 Difference]: Finished difference. Result has 491 places, 657 transitions, 12277 flow [2024-06-20 15:34:25,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11482, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12277, PETRI_PLACES=491, PETRI_TRANSITIONS=657} [2024-06-20 15:34:25,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-20 15:34:25,427 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 657 transitions, 12277 flow [2024-06-20 15:34:25,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:34:25,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:25,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:25,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:34:25,427 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:25,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:25,427 INFO L85 PathProgramCache]: Analyzing trace with hash -624114777, now seen corresponding path program 22 times [2024-06-20 15:34:25,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:25,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592033558] [2024-06-20 15:34:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:25,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:25,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:25,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592033558] [2024-06-20 15:34:25,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592033558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:25,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:25,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:34:25,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792780586] [2024-06-20 15:34:25,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:25,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:34:25,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:34:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:34:25,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:34:25,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 657 transitions, 12277 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:25,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:25,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:34:25,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:26,833 INFO L124 PetriNetUnfolderBase]: 3128/5303 cut-off events. [2024-06-20 15:34:26,833 INFO L125 PetriNetUnfolderBase]: For 1267142/1267144 co-relation queries the response was YES. [2024-06-20 15:34:26,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49366 conditions, 5303 events. 3128/5303 cut-off events. For 1267142/1267144 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35531 event pairs, 565 based on Foata normal form. 1/5302 useless extension candidates. Maximal degree in co-relation 49143. Up to 4443 conditions per place. [2024-06-20 15:34:26,924 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 517 selfloop transitions, 165 changer transitions 0/690 dead transitions. [2024-06-20 15:34:26,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 690 transitions, 14041 flow [2024-06-20 15:34:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:34:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:34:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:34:26,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:34:26,925 INFO L175 Difference]: Start difference. First operand has 491 places, 657 transitions, 12277 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:34:26,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 690 transitions, 14041 flow [2024-06-20 15:34:34,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 690 transitions, 13861 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-20 15:34:34,294 INFO L231 Difference]: Finished difference. Result has 494 places, 657 transitions, 12450 flow [2024-06-20 15:34:34,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12099, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12450, PETRI_PLACES=494, PETRI_TRANSITIONS=657} [2024-06-20 15:34:34,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-20 15:34:34,294 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 657 transitions, 12450 flow [2024-06-20 15:34:34,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:34,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:34,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:34,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:34:34,295 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:34,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1311995427, now seen corresponding path program 16 times [2024-06-20 15:34:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:34,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177929809] [2024-06-20 15:34:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:34,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:34,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177929809] [2024-06-20 15:34:34,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177929809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:34,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:34,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:34,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140764888] [2024-06-20 15:34:34,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:34,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:34,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:34,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:34,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:34,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:34:34,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 657 transitions, 12450 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:34:34,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:34,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:34:34,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:35,741 INFO L124 PetriNetUnfolderBase]: 3125/5287 cut-off events. [2024-06-20 15:34:35,742 INFO L125 PetriNetUnfolderBase]: For 1258740/1258750 co-relation queries the response was YES. [2024-06-20 15:34:35,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49548 conditions, 5287 events. 3125/5287 cut-off events. For 1258740/1258750 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35364 event pairs, 572 based on Foata normal form. 1/5284 useless extension candidates. Maximal degree in co-relation 49323. Up to 4402 conditions per place. [2024-06-20 15:34:35,850 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 506 selfloop transitions, 173 changer transitions 0/687 dead transitions. [2024-06-20 15:34:35,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 687 transitions, 14590 flow [2024-06-20 15:34:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:34:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:34:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 15:34:35,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-20 15:34:35,851 INFO L175 Difference]: Start difference. First operand has 494 places, 657 transitions, 12450 flow. Second operand 7 states and 186 transitions. [2024-06-20 15:34:35,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 687 transitions, 14590 flow [2024-06-20 15:34:44,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 687 transitions, 13970 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-20 15:34:44,013 INFO L231 Difference]: Finished difference. Result has 490 places, 658 transitions, 12255 flow [2024-06-20 15:34:44,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11838, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12255, PETRI_PLACES=490, PETRI_TRANSITIONS=658} [2024-06-20 15:34:44,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-20 15:34:44,014 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 658 transitions, 12255 flow [2024-06-20 15:34:44,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:34:44,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:44,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:44,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:34:44,014 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:44,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:44,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1848024689, now seen corresponding path program 17 times [2024-06-20 15:34:44,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:44,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142413264] [2024-06-20 15:34:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:44,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:44,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:44,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142413264] [2024-06-20 15:34:44,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142413264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:44,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:44,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22043838] [2024-06-20 15:34:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:44,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:44,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:44,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:44,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:34:44,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 658 transitions, 12255 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:34:44,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:44,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:34:44,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:45,393 INFO L124 PetriNetUnfolderBase]: 3122/5287 cut-off events. [2024-06-20 15:34:45,394 INFO L125 PetriNetUnfolderBase]: For 1229006/1229006 co-relation queries the response was YES. [2024-06-20 15:34:45,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49113 conditions, 5287 events. 3122/5287 cut-off events. For 1229006/1229006 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35442 event pairs, 564 based on Foata normal form. 1/5286 useless extension candidates. Maximal degree in co-relation 48890. Up to 4659 conditions per place. [2024-06-20 15:34:45,483 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 616 selfloop transitions, 67 changer transitions 0/691 dead transitions. [2024-06-20 15:34:45,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 691 transitions, 14025 flow [2024-06-20 15:34:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:34:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:34:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:34:45,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-20 15:34:45,484 INFO L175 Difference]: Start difference. First operand has 490 places, 658 transitions, 12255 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:34:45,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 691 transitions, 14025 flow [2024-06-20 15:34:52,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 691 transitions, 13625 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-20 15:34:52,978 INFO L231 Difference]: Finished difference. Result has 488 places, 658 transitions, 12011 flow [2024-06-20 15:34:52,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11855, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12011, PETRI_PLACES=488, PETRI_TRANSITIONS=658} [2024-06-20 15:34:52,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-20 15:34:52,979 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 658 transitions, 12011 flow [2024-06-20 15:34:52,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:34:52,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:52,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:52,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:34:52,979 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:52,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1614258037, now seen corresponding path program 18 times [2024-06-20 15:34:52,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:52,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925398204] [2024-06-20 15:34:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:52,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:53,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:53,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925398204] [2024-06-20 15:34:53,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925398204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:53,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:53,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:53,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273879996] [2024-06-20 15:34:53,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:53,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:53,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:53,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:53,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:53,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:34:53,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 658 transitions, 12011 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:34:53,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:53,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:34:53,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:54,292 INFO L124 PetriNetUnfolderBase]: 3127/5289 cut-off events. [2024-06-20 15:34:54,293 INFO L125 PetriNetUnfolderBase]: For 1248884/1248884 co-relation queries the response was YES. [2024-06-20 15:34:54,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48927 conditions, 5289 events. 3127/5289 cut-off events. For 1248884/1248884 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35365 event pairs, 582 based on Foata normal form. 1/5277 useless extension candidates. Maximal degree in co-relation 48707. Up to 4217 conditions per place. [2024-06-20 15:34:54,382 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 263 changer transitions 0/689 dead transitions. [2024-06-20 15:34:54,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 689 transitions, 14779 flow [2024-06-20 15:34:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:34:54,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:34:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:34:54,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:34:54,383 INFO L175 Difference]: Start difference. First operand has 488 places, 658 transitions, 12011 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:34:54,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 689 transitions, 14779 flow [2024-06-20 15:35:00,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 689 transitions, 14469 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:35:00,885 INFO L231 Difference]: Finished difference. Result has 490 places, 662 transitions, 12387 flow [2024-06-20 15:35:00,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11701, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12387, PETRI_PLACES=490, PETRI_TRANSITIONS=662} [2024-06-20 15:35:00,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-20 15:35:00,885 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 662 transitions, 12387 flow [2024-06-20 15:35:00,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:00,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:00,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:35:00,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 15:35:00,886 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:00,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:00,886 INFO L85 PathProgramCache]: Analyzing trace with hash 799293917, now seen corresponding path program 19 times [2024-06-20 15:35:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:00,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648838412] [2024-06-20 15:35:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:00,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:00,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:00,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648838412] [2024-06-20 15:35:00,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648838412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:00,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:00,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:00,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705863860] [2024-06-20 15:35:00,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:00,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:00,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:00,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:01,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:35:01,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 662 transitions, 12387 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:01,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:01,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:35:01,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:02,238 INFO L124 PetriNetUnfolderBase]: 3124/5286 cut-off events. [2024-06-20 15:35:02,238 INFO L125 PetriNetUnfolderBase]: For 1254122/1254132 co-relation queries the response was YES. [2024-06-20 15:35:02,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49221 conditions, 5286 events. 3124/5286 cut-off events. For 1254122/1254132 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35362 event pairs, 569 based on Foata normal form. 1/5283 useless extension candidates. Maximal degree in co-relation 49001. Up to 4405 conditions per place. [2024-06-20 15:35:02,327 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 501 selfloop transitions, 188 changer transitions 0/697 dead transitions. [2024-06-20 15:35:02,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 697 transitions, 14171 flow [2024-06-20 15:35:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:35:02,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:35:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-20 15:35:02,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 15:35:02,328 INFO L175 Difference]: Start difference. First operand has 490 places, 662 transitions, 12387 flow. Second operand 9 states and 231 transitions. [2024-06-20 15:35:02,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 697 transitions, 14171 flow [2024-06-20 15:35:11,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 697 transitions, 13497 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-20 15:35:11,492 INFO L231 Difference]: Finished difference. Result has 493 places, 662 transitions, 12111 flow [2024-06-20 15:35:11,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11713, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12111, PETRI_PLACES=493, PETRI_TRANSITIONS=662} [2024-06-20 15:35:11,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-20 15:35:11,493 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 662 transitions, 12111 flow [2024-06-20 15:35:11,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:11,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:11,493 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] [2024-06-20 15:35:11,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 15:35:11,494 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:11,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 401138243, now seen corresponding path program 20 times [2024-06-20 15:35:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598293351] [2024-06-20 15:35:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:11,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:11,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:11,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598293351] [2024-06-20 15:35:11,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598293351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:11,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:11,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:11,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275197393] [2024-06-20 15:35:11,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:11,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:11,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:11,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:11,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:35:11,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 662 transitions, 12111 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:11,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:11,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:35:11,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:12,844 INFO L124 PetriNetUnfolderBase]: 3121/5298 cut-off events. [2024-06-20 15:35:12,844 INFO L125 PetriNetUnfolderBase]: For 1253281/1253281 co-relation queries the response was YES. [2024-06-20 15:35:12,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48974 conditions, 5298 events. 3121/5298 cut-off events. For 1253281/1253281 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35566 event pairs, 594 based on Foata normal form. 1/5286 useless extension candidates. Maximal degree in co-relation 48753. Up to 4213 conditions per place. [2024-06-20 15:35:12,941 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 415 selfloop transitions, 267 changer transitions 0/690 dead transitions. [2024-06-20 15:35:12,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 690 transitions, 14159 flow [2024-06-20 15:35:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:35:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:35:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:35:12,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:35:12,941 INFO L175 Difference]: Start difference. First operand has 493 places, 662 transitions, 12111 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:35:12,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 690 transitions, 14159 flow [2024-06-20 15:35:22,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 690 transitions, 13683 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-20 15:35:22,775 INFO L231 Difference]: Finished difference. Result has 492 places, 662 transitions, 12179 flow [2024-06-20 15:35:22,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11639, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12179, PETRI_PLACES=492, PETRI_TRANSITIONS=662} [2024-06-20 15:35:22,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-20 15:35:22,775 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 662 transitions, 12179 flow [2024-06-20 15:35:22,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:22,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:22,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:35:22,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 15:35:22,775 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:22,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash -768201351, now seen corresponding path program 21 times [2024-06-20 15:35:22,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:22,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359260152] [2024-06-20 15:35:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:22,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:22,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:22,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359260152] [2024-06-20 15:35:22,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359260152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:22,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:22,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:22,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530041208] [2024-06-20 15:35:22,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:22,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:22,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:22,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:22,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:22,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:35:22,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 662 transitions, 12179 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:22,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:22,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:35:22,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:24,075 INFO L124 PetriNetUnfolderBase]: 3126/5313 cut-off events. [2024-06-20 15:35:24,075 INFO L125 PetriNetUnfolderBase]: For 1254739/1254741 co-relation queries the response was YES. [2024-06-20 15:35:24,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49164 conditions, 5313 events. 3126/5313 cut-off events. For 1254739/1254741 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35659 event pairs, 574 based on Foata normal form. 1/5312 useless extension candidates. Maximal degree in co-relation 48943. Up to 4217 conditions per place. [2024-06-20 15:35:24,170 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 428 selfloop transitions, 260 changer transitions 0/696 dead transitions. [2024-06-20 15:35:24,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 696 transitions, 14328 flow [2024-06-20 15:35:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:35:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:35:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-20 15:35:24,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:35:24,171 INFO L175 Difference]: Start difference. First operand has 492 places, 662 transitions, 12179 flow. Second operand 9 states and 225 transitions. [2024-06-20 15:35:24,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 696 transitions, 14328 flow [2024-06-20 15:35:32,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 696 transitions, 13728 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:35:32,195 INFO L231 Difference]: Finished difference. Result has 493 places, 665 transitions, 12198 flow [2024-06-20 15:35:32,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11589, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12198, PETRI_PLACES=493, PETRI_TRANSITIONS=665} [2024-06-20 15:35:32,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-20 15:35:32,196 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 665 transitions, 12198 flow [2024-06-20 15:35:32,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:32,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:32,196 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] [2024-06-20 15:35:32,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 15:35:32,196 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:32,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:32,196 INFO L85 PathProgramCache]: Analyzing trace with hash -624322167, now seen corresponding path program 23 times [2024-06-20 15:35:32,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:32,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000848593] [2024-06-20 15:35:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:32,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:32,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:32,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000848593] [2024-06-20 15:35:32,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000848593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:32,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:32,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:32,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68374253] [2024-06-20 15:35:32,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:32,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:32,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:32,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:32,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:32,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:35:32,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 665 transitions, 12198 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:32,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:32,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:35:32,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:33,511 INFO L124 PetriNetUnfolderBase]: 3123/5305 cut-off events. [2024-06-20 15:35:33,511 INFO L125 PetriNetUnfolderBase]: For 1243487/1243489 co-relation queries the response was YES. [2024-06-20 15:35:33,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48939 conditions, 5305 events. 3123/5305 cut-off events. For 1243487/1243489 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35602 event pairs, 571 based on Foata normal form. 1/5304 useless extension candidates. Maximal degree in co-relation 48717. Up to 4438 conditions per place. [2024-06-20 15:35:33,600 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 534 selfloop transitions, 159 changer transitions 0/701 dead transitions. [2024-06-20 15:35:33,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 701 transitions, 13998 flow [2024-06-20 15:35:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:35:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:35:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-20 15:35:33,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-20 15:35:33,613 INFO L175 Difference]: Start difference. First operand has 493 places, 665 transitions, 12198 flow. Second operand 9 states and 226 transitions. [2024-06-20 15:35:33,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 701 transitions, 13998 flow [2024-06-20 15:35:41,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 701 transitions, 13441 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-20 15:35:41,692 INFO L231 Difference]: Finished difference. Result has 494 places, 665 transitions, 11982 flow [2024-06-20 15:35:41,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11643, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11982, PETRI_PLACES=494, PETRI_TRANSITIONS=665} [2024-06-20 15:35:41,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-20 15:35:41,692 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 665 transitions, 11982 flow [2024-06-20 15:35:41,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:41,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:41,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:35:41,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 15:35:41,692 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:41,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:41,693 INFO L85 PathProgramCache]: Analyzing trace with hash -624321981, now seen corresponding path program 22 times [2024-06-20 15:35:41,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:41,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161961342] [2024-06-20 15:35:41,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:41,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:41,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:41,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161961342] [2024-06-20 15:35:41,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161961342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:41,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:41,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:41,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019640347] [2024-06-20 15:35:41,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:41,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:41,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:41,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:41,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:35:41,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 665 transitions, 11982 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:41,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:41,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:35:41,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:42,976 INFO L124 PetriNetUnfolderBase]: 3120/5304 cut-off events. [2024-06-20 15:35:42,976 INFO L125 PetriNetUnfolderBase]: For 1233522/1233524 co-relation queries the response was YES. [2024-06-20 15:35:43,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48547 conditions, 5304 events. 3120/5304 cut-off events. For 1233522/1233524 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 35635 event pairs, 574 based on Foata normal form. 1/5303 useless extension candidates. Maximal degree in co-relation 48325. Up to 4213 conditions per place. [2024-06-20 15:35:43,075 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 263 changer transitions 0/698 dead transitions. [2024-06-20 15:35:43,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 698 transitions, 13764 flow [2024-06-20 15:35:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:35:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:35:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-20 15:35:43,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:35:43,076 INFO L175 Difference]: Start difference. First operand has 494 places, 665 transitions, 11982 flow. Second operand 9 states and 228 transitions. [2024-06-20 15:35:43,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 698 transitions, 13764 flow [2024-06-20 15:35:51,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 698 transitions, 13428 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-20 15:35:51,235 INFO L231 Difference]: Finished difference. Result has 493 places, 665 transitions, 12186 flow [2024-06-20 15:35:51,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11650, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12186, PETRI_PLACES=493, PETRI_TRANSITIONS=665} [2024-06-20 15:35:51,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-20 15:35:51,236 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 665 transitions, 12186 flow [2024-06-20 15:35:51,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:51,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:51,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:35:51,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 15:35:51,236 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:51,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash 401138057, now seen corresponding path program 24 times [2024-06-20 15:35:51,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:51,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407786280] [2024-06-20 15:35:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:51,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:51,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407786280] [2024-06-20 15:35:51,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407786280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:51,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:51,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:51,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336661609] [2024-06-20 15:35:51,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:51,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:51,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:51,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:51,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:51,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:35:51,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 665 transitions, 12186 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:35:51,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:51,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:35:51,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:52,556 INFO L124 PetriNetUnfolderBase]: 3117/5295 cut-off events. [2024-06-20 15:35:52,556 INFO L125 PetriNetUnfolderBase]: For 1211202/1211202 co-relation queries the response was YES. [2024-06-20 15:35:52,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48426 conditions, 5295 events. 3117/5295 cut-off events. For 1211202/1211202 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35603 event pairs, 586 based on Foata normal form. 1/5283 useless extension candidates. Maximal degree in co-relation 48205. Up to 4431 conditions per place. [2024-06-20 15:35:52,654 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 524 selfloop transitions, 162 changer transitions 0/694 dead transitions. [2024-06-20 15:35:52,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 694 transitions, 13658 flow [2024-06-20 15:35:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:35:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:35:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:35:52,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:35:52,655 INFO L175 Difference]: Start difference. First operand has 493 places, 665 transitions, 12186 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:35:52,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 694 transitions, 13658 flow [2024-06-20 15:36:01,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 694 transitions, 13056 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:36:01,630 INFO L231 Difference]: Finished difference. Result has 491 places, 665 transitions, 11925 flow [2024-06-20 15:36:01,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11584, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11925, PETRI_PLACES=491, PETRI_TRANSITIONS=665} [2024-06-20 15:36:01,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-20 15:36:01,631 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 665 transitions, 11925 flow [2024-06-20 15:36:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:36:01,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:01,631 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] [2024-06-20 15:36:01,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 15:36:01,631 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:01,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:01,631 INFO L85 PathProgramCache]: Analyzing trace with hash -772023837, now seen corresponding path program 4 times [2024-06-20 15:36:01,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:01,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180924064] [2024-06-20 15:36:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:01,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:01,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180924064] [2024-06-20 15:36:01,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180924064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:01,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:01,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:36:01,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575333546] [2024-06-20 15:36:01,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:01,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:36:01,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:01,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:36:01,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:36:01,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:36:01,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 665 transitions, 11925 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:36:01,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:01,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:36:01,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:02,925 INFO L124 PetriNetUnfolderBase]: 3104/5283 cut-off events. [2024-06-20 15:36:02,925 INFO L125 PetriNetUnfolderBase]: For 1198272/1198272 co-relation queries the response was YES. [2024-06-20 15:36:02,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47211 conditions, 5283 events. 3104/5283 cut-off events. For 1198272/1198272 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35478 event pairs, 440 based on Foata normal form. 6/5287 useless extension candidates. Maximal degree in co-relation 46990. Up to 4388 conditions per place. [2024-06-20 15:36:03,014 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 630 selfloop transitions, 61 changer transitions 0/699 dead transitions. [2024-06-20 15:36:03,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 699 transitions, 13449 flow [2024-06-20 15:36:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:36:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:36:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:36:03,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-20 15:36:03,015 INFO L175 Difference]: Start difference. First operand has 491 places, 665 transitions, 11925 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:36:03,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 699 transitions, 13449 flow [2024-06-20 15:36:12,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 699 transitions, 12930 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:36:12,118 INFO L231 Difference]: Finished difference. Result has 488 places, 665 transitions, 11538 flow [2024-06-20 15:36:12,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11406, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11538, PETRI_PLACES=488, PETRI_TRANSITIONS=665} [2024-06-20 15:36:12,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-20 15:36:12,118 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 665 transitions, 11538 flow [2024-06-20 15:36:12,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:36:12,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:12,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:12,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 15:36:12,119 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:12,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1151152237, now seen corresponding path program 5 times [2024-06-20 15:36:12,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:12,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574959273] [2024-06-20 15:36:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:12,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:12,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:12,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574959273] [2024-06-20 15:36:12,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574959273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:12,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:12,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:36:12,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578676522] [2024-06-20 15:36:12,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:12,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:36:12,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:12,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:36:12,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:36:12,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:36:12,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 665 transitions, 11538 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:36:12,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:12,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:36:12,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:13,423 INFO L124 PetriNetUnfolderBase]: 3112/5285 cut-off events. [2024-06-20 15:36:13,423 INFO L125 PetriNetUnfolderBase]: For 1152715/1152715 co-relation queries the response was YES. [2024-06-20 15:36:13,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46969 conditions, 5285 events. 3112/5285 cut-off events. For 1152715/1152715 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35547 event pairs, 609 based on Foata normal form. 2/5269 useless extension candidates. Maximal degree in co-relation 46748. Up to 4584 conditions per place. [2024-06-20 15:36:13,515 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 584 selfloop transitions, 97 changer transitions 0/689 dead transitions. [2024-06-20 15:36:13,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 689 transitions, 13002 flow [2024-06-20 15:36:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:36:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:36:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:36:13,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-20 15:36:13,516 INFO L175 Difference]: Start difference. First operand has 488 places, 665 transitions, 11538 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:36:13,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 689 transitions, 13002 flow [2024-06-20 15:36:21,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 689 transitions, 12897 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:36:21,463 INFO L231 Difference]: Finished difference. Result has 491 places, 667 transitions, 11664 flow [2024-06-20 15:36:21,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11433, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11664, PETRI_PLACES=491, PETRI_TRANSITIONS=667} [2024-06-20 15:36:21,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-20 15:36:21,464 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 667 transitions, 11664 flow [2024-06-20 15:36:21,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:36:21,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:21,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:21,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 15:36:21,465 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:21,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:21,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1002890007, now seen corresponding path program 6 times [2024-06-20 15:36:21,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:21,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041083174] [2024-06-20 15:36:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:21,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:21,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041083174] [2024-06-20 15:36:21,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041083174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:21,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:21,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:36:21,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960040767] [2024-06-20 15:36:21,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:21,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:36:21,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:36:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:36:21,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:36:21,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 667 transitions, 11664 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:21,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:21,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:36:21,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:22,744 INFO L124 PetriNetUnfolderBase]: 3133/5322 cut-off events. [2024-06-20 15:36:22,744 INFO L125 PetriNetUnfolderBase]: For 1147860/1147866 co-relation queries the response was YES. [2024-06-20 15:36:22,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47286 conditions, 5322 events. 3133/5322 cut-off events. For 1147860/1147866 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 35837 event pairs, 602 based on Foata normal form. 6/5318 useless extension candidates. Maximal degree in co-relation 47065. Up to 4577 conditions per place. [2024-06-20 15:36:22,834 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 594 selfloop transitions, 95 changer transitions 0/697 dead transitions. [2024-06-20 15:36:22,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 697 transitions, 13490 flow [2024-06-20 15:36:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:36:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:36:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:36:22,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-20 15:36:22,836 INFO L175 Difference]: Start difference. First operand has 491 places, 667 transitions, 11664 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:36:22,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 697 transitions, 13490 flow [2024-06-20 15:36:30,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 697 transitions, 13279 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:36:30,835 INFO L231 Difference]: Finished difference. Result has 492 places, 671 transitions, 11724 flow [2024-06-20 15:36:30,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11453, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11724, PETRI_PLACES=492, PETRI_TRANSITIONS=671} [2024-06-20 15:36:30,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-20 15:36:30,836 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 671 transitions, 11724 flow [2024-06-20 15:36:30,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:30,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:30,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:30,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 15:36:30,836 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:30,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1340141025, now seen corresponding path program 5 times [2024-06-20 15:36:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:30,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557945289] [2024-06-20 15:36:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:30,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:30,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557945289] [2024-06-20 15:36:30,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557945289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:30,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:30,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:36:30,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868898884] [2024-06-20 15:36:30,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:30,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:36:30,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:36:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:36:30,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:36:30,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 671 transitions, 11724 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:36:30,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:30,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:36:30,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:32,145 INFO L124 PetriNetUnfolderBase]: 3141/5326 cut-off events. [2024-06-20 15:36:32,145 INFO L125 PetriNetUnfolderBase]: For 1162770/1162770 co-relation queries the response was YES. [2024-06-20 15:36:32,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47624 conditions, 5326 events. 3141/5326 cut-off events. For 1162770/1162770 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 35794 event pairs, 644 based on Foata normal form. 2/5304 useless extension candidates. Maximal degree in co-relation 47402. Up to 4481 conditions per place. [2024-06-20 15:36:32,236 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 486 selfloop transitions, 201 changer transitions 0/695 dead transitions. [2024-06-20 15:36:32,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 695 transitions, 13250 flow [2024-06-20 15:36:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:36:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:36:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:36:32,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:36:32,237 INFO L175 Difference]: Start difference. First operand has 492 places, 671 transitions, 11724 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:36:32,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 695 transitions, 13250 flow [2024-06-20 15:36:39,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 695 transitions, 13094 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 15:36:39,518 INFO L231 Difference]: Finished difference. Result has 497 places, 673 transitions, 12057 flow [2024-06-20 15:36:39,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11568, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12057, PETRI_PLACES=497, PETRI_TRANSITIONS=673} [2024-06-20 15:36:39,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-20 15:36:39,518 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 673 transitions, 12057 flow [2024-06-20 15:36:39,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:36:39,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:39,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:39,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 15:36:39,518 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:39,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1000033047, now seen corresponding path program 7 times [2024-06-20 15:36:39,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:39,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590527626] [2024-06-20 15:36:39,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:39,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:39,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:39,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590527626] [2024-06-20 15:36:39,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590527626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:39,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:39,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:36:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792043875] [2024-06-20 15:36:39,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:39,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:36:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:36:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:36:39,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:36:39,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 673 transitions, 12057 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:39,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:39,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:36:39,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:40,815 INFO L124 PetriNetUnfolderBase]: 3149/5351 cut-off events. [2024-06-20 15:36:40,815 INFO L125 PetriNetUnfolderBase]: For 1182054/1182060 co-relation queries the response was YES. [2024-06-20 15:36:40,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48201 conditions, 5351 events. 3149/5351 cut-off events. For 1182054/1182060 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 36030 event pairs, 609 based on Foata normal form. 6/5347 useless extension candidates. Maximal degree in co-relation 47977. Up to 4639 conditions per place. [2024-06-20 15:36:40,906 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 595 selfloop transitions, 93 changer transitions 0/696 dead transitions. [2024-06-20 15:36:40,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 696 transitions, 13527 flow [2024-06-20 15:36:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:36:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:36:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:36:40,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-20 15:36:40,907 INFO L175 Difference]: Start difference. First operand has 497 places, 673 transitions, 12057 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:36:40,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 696 transitions, 13527 flow [2024-06-20 15:36:48,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 696 transitions, 13054 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:36:48,957 INFO L231 Difference]: Finished difference. Result has 498 places, 675 transitions, 11801 flow [2024-06-20 15:36:48,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11584, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11801, PETRI_PLACES=498, PETRI_TRANSITIONS=675} [2024-06-20 15:36:48,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-20 15:36:48,958 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 675 transitions, 11801 flow [2024-06-20 15:36:48,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:48,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:48,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:48,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 15:36:48,958 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:48,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:48,959 INFO L85 PathProgramCache]: Analyzing trace with hash 508615591, now seen corresponding path program 8 times [2024-06-20 15:36:48,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:48,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47061857] [2024-06-20 15:36:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:48,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:49,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:49,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47061857] [2024-06-20 15:36:49,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47061857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:49,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:49,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:36:49,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343837540] [2024-06-20 15:36:49,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:49,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:36:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:49,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:36:49,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:36:49,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:36:49,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 675 transitions, 11801 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:49,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:49,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:36:49,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:50,250 INFO L124 PetriNetUnfolderBase]: 3157/5379 cut-off events. [2024-06-20 15:36:50,250 INFO L125 PetriNetUnfolderBase]: For 1194216/1194222 co-relation queries the response was YES. [2024-06-20 15:36:50,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48065 conditions, 5379 events. 3157/5379 cut-off events. For 1194216/1194222 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36387 event pairs, 527 based on Foata normal form. 6/5375 useless extension candidates. Maximal degree in co-relation 47840. Up to 4442 conditions per place. [2024-06-20 15:36:50,342 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 587 selfloop transitions, 117 changer transitions 0/712 dead transitions. [2024-06-20 15:36:50,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 712 transitions, 14025 flow [2024-06-20 15:36:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:36:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:36:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:36:50,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:36:50,343 INFO L175 Difference]: Start difference. First operand has 498 places, 675 transitions, 11801 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:36:50,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 712 transitions, 14025 flow [2024-06-20 15:36:58,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 712 transitions, 13875 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:36:58,047 INFO L231 Difference]: Finished difference. Result has 502 places, 684 transitions, 12083 flow [2024-06-20 15:36:58,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11651, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12083, PETRI_PLACES=502, PETRI_TRANSITIONS=684} [2024-06-20 15:36:58,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-20 15:36:58,048 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 684 transitions, 12083 flow [2024-06-20 15:36:58,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:58,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:58,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:58,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 15:36:58,048 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:58,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash 795918631, now seen corresponding path program 9 times [2024-06-20 15:36:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:58,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776329796] [2024-06-20 15:36:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:58,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:58,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:58,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776329796] [2024-06-20 15:36:58,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776329796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:58,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:58,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:36:58,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844139719] [2024-06-20 15:36:58,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:58,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:36:58,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:58,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:36:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:36:58,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:36:58,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 684 transitions, 12083 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:58,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:58,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:36:58,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:59,387 INFO L124 PetriNetUnfolderBase]: 3165/5392 cut-off events. [2024-06-20 15:36:59,387 INFO L125 PetriNetUnfolderBase]: For 1211981/1211987 co-relation queries the response was YES. [2024-06-20 15:36:59,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48720 conditions, 5392 events. 3165/5392 cut-off events. For 1211981/1211987 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36386 event pairs, 533 based on Foata normal form. 6/5388 useless extension candidates. Maximal degree in co-relation 48493. Up to 4450 conditions per place. [2024-06-20 15:36:59,484 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 584 selfloop transitions, 119 changer transitions 0/711 dead transitions. [2024-06-20 15:36:59,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 711 transitions, 13928 flow [2024-06-20 15:36:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:36:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:36:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:36:59,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 15:36:59,485 INFO L175 Difference]: Start difference. First operand has 502 places, 684 transitions, 12083 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:36:59,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 711 transitions, 13928 flow [2024-06-20 15:37:09,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 711 transitions, 13712 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-20 15:37:09,020 INFO L231 Difference]: Finished difference. Result has 507 places, 687 transitions, 12175 flow [2024-06-20 15:37:09,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11897, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12175, PETRI_PLACES=507, PETRI_TRANSITIONS=687} [2024-06-20 15:37:09,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-20 15:37:09,020 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 687 transitions, 12175 flow [2024-06-20 15:37:09,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:09,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:37:09,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:37:09,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 15:37:09,021 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:37:09,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:37:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash 909422341, now seen corresponding path program 10 times [2024-06-20 15:37:09,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:37:09,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619141463] [2024-06-20 15:37:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:37:09,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:37:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:37:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:37:09,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:37:09,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619141463] [2024-06-20 15:37:09,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619141463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:37:09,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:37:09,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:37:09,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830135796] [2024-06-20 15:37:09,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:37:09,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:37:09,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:37:09,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:37:09,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:37:09,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:37:09,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 687 transitions, 12175 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:09,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:37:09,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:37:09,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:37:10,327 INFO L124 PetriNetUnfolderBase]: 3186/5418 cut-off events. [2024-06-20 15:37:10,327 INFO L125 PetriNetUnfolderBase]: For 1248169/1248175 co-relation queries the response was YES. [2024-06-20 15:37:10,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49270 conditions, 5418 events. 3186/5418 cut-off events. For 1248169/1248175 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36546 event pairs, 614 based on Foata normal form. 6/5414 useless extension candidates. Maximal degree in co-relation 49041. Up to 4665 conditions per place. [2024-06-20 15:37:10,421 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 603 selfloop transitions, 101 changer transitions 0/712 dead transitions. [2024-06-20 15:37:10,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 712 transitions, 14024 flow [2024-06-20 15:37:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:37:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:37:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:37:10,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-20 15:37:10,422 INFO L175 Difference]: Start difference. First operand has 507 places, 687 transitions, 12175 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:37:10,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 712 transitions, 14024 flow [2024-06-20 15:37:19,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 712 transitions, 13819 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:37:19,382 INFO L231 Difference]: Finished difference. Result has 512 places, 692 transitions, 12276 flow [2024-06-20 15:37:19,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11975, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12276, PETRI_PLACES=512, PETRI_TRANSITIONS=692} [2024-06-20 15:37:19,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-20 15:37:19,383 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 692 transitions, 12276 flow [2024-06-20 15:37:19,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:19,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:37:19,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:37:19,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 15:37:19,383 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:37:19,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:37:19,383 INFO L85 PathProgramCache]: Analyzing trace with hash 899899141, now seen corresponding path program 11 times [2024-06-20 15:37:19,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:37:19,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642729494] [2024-06-20 15:37:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:37:19,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:37:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:37:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:37:19,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:37:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642729494] [2024-06-20 15:37:19,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642729494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:37:19,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:37:19,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:37:19,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856087820] [2024-06-20 15:37:19,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:37:19,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:37:19,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:37:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:37:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:37:19,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:37:19,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 692 transitions, 12276 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:19,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:37:19,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:37:19,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:37:20,696 INFO L124 PetriNetUnfolderBase]: 3181/5415 cut-off events. [2024-06-20 15:37:20,696 INFO L125 PetriNetUnfolderBase]: For 1241623/1241629 co-relation queries the response was YES. [2024-06-20 15:37:20,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48994 conditions, 5415 events. 3181/5415 cut-off events. For 1241623/1241629 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 36673 event pairs, 617 based on Foata normal form. 6/5411 useless extension candidates. Maximal degree in co-relation 48763. Up to 4687 conditions per place. [2024-06-20 15:37:20,794 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 608 selfloop transitions, 94 changer transitions 0/710 dead transitions. [2024-06-20 15:37:20,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 710 transitions, 13740 flow [2024-06-20 15:37:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:37:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:37:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 15:37:20,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-20 15:37:20,795 INFO L175 Difference]: Start difference. First operand has 512 places, 692 transitions, 12276 flow. Second operand 7 states and 163 transitions. [2024-06-20 15:37:20,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 710 transitions, 13740 flow [2024-06-20 15:37:28,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 710 transitions, 13573 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 15:37:28,654 INFO L231 Difference]: Finished difference. Result has 516 places, 692 transitions, 12302 flow [2024-06-20 15:37:28,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12109, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12302, PETRI_PLACES=516, PETRI_TRANSITIONS=692} [2024-06-20 15:37:28,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-20 15:37:28,655 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 692 transitions, 12302 flow [2024-06-20 15:37:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:28,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:37:28,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:37:28,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 15:37:28,655 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:37:28,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:37:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash 371898437, now seen corresponding path program 12 times [2024-06-20 15:37:28,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:37:28,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706082821] [2024-06-20 15:37:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:37:28,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:37:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:37:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:37:28,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:37:28,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706082821] [2024-06-20 15:37:28,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706082821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:37:28,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:37:28,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:37:28,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20025746] [2024-06-20 15:37:28,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:37:28,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:37:28,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:37:28,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:37:28,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:37:28,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:37:28,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 692 transitions, 12302 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:37:28,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:37:28,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:37:28,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:37:29,987 INFO L124 PetriNetUnfolderBase]: 3189/5411 cut-off events. [2024-06-20 15:37:29,987 INFO L125 PetriNetUnfolderBase]: For 1256497/1256497 co-relation queries the response was YES. [2024-06-20 15:37:30,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49132 conditions, 5411 events. 3189/5411 cut-off events. For 1256497/1256497 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 36492 event pairs, 612 based on Foata normal form. 2/5398 useless extension candidates. Maximal degree in co-relation 48900. Up to 4699 conditions per place. [2024-06-20 15:37:30,092 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 607 selfloop transitions, 98 changer transitions 0/713 dead transitions. [2024-06-20 15:37:30,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 713 transitions, 13812 flow [2024-06-20 15:37:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:37:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:37:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:37:30,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-20 15:37:30,104 INFO L175 Difference]: Start difference. First operand has 516 places, 692 transitions, 12302 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:37:30,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 713 transitions, 13812 flow [2024-06-20 15:37:40,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 713 transitions, 13623 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:37:40,169 INFO L231 Difference]: Finished difference. Result has 519 places, 694 transitions, 12356 flow [2024-06-20 15:37:40,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12113, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12356, PETRI_PLACES=519, PETRI_TRANSITIONS=694} [2024-06-20 15:37:40,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-20 15:37:40,170 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 694 transitions, 12356 flow [2024-06-20 15:37:40,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:37:40,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:37:40,170 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] [2024-06-20 15:37:40,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-20 15:37:40,170 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:37:40,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:37:40,170 INFO L85 PathProgramCache]: Analyzing trace with hash 867335051, now seen corresponding path program 13 times [2024-06-20 15:37:40,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:37:40,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969898127] [2024-06-20 15:37:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:37:40,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:37:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:37:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:37:40,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:37:40,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969898127] [2024-06-20 15:37:40,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969898127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:37:40,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:37:40,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:37:40,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372011560] [2024-06-20 15:37:40,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:37:40,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:37:40,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:37:40,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:37:40,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:37:40,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:37:40,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 694 transitions, 12356 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:37:40,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:37:40,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:37:40,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:37:41,559 INFO L124 PetriNetUnfolderBase]: 3210/5444 cut-off events. [2024-06-20 15:37:41,559 INFO L125 PetriNetUnfolderBase]: For 1295150/1295150 co-relation queries the response was YES. [2024-06-20 15:37:41,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49792 conditions, 5444 events. 3210/5444 cut-off events. For 1295150/1295150 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 36732 event pairs, 611 based on Foata normal form. 2/5429 useless extension candidates. Maximal degree in co-relation 49559. Up to 4695 conditions per place. [2024-06-20 15:37:41,659 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 605 selfloop transitions, 107 changer transitions 0/720 dead transitions. [2024-06-20 15:37:41,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 720 transitions, 14236 flow [2024-06-20 15:37:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:37:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:37:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:37:41,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-20 15:37:41,660 INFO L175 Difference]: Start difference. First operand has 519 places, 694 transitions, 12356 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:37:41,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 720 transitions, 14236 flow [2024-06-20 15:37:51,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 720 transitions, 14021 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:37:51,353 INFO L231 Difference]: Finished difference. Result has 522 places, 699 transitions, 12469 flow [2024-06-20 15:37:51,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12141, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12469, PETRI_PLACES=522, PETRI_TRANSITIONS=699} [2024-06-20 15:37:51,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-20 15:37:51,354 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 699 transitions, 12469 flow [2024-06-20 15:37:51,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:37:51,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:37:51,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:37:51,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-20 15:37:51,354 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:37:51,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:37:51,355 INFO L85 PathProgramCache]: Analyzing trace with hash 601311341, now seen corresponding path program 14 times [2024-06-20 15:37:51,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:37:51,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178134054] [2024-06-20 15:37:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:37:51,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:37:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:37:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:37:51,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:37:51,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178134054] [2024-06-20 15:37:51,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178134054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:37:51,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:37:51,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:37:51,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679479310] [2024-06-20 15:37:51,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:37:51,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:37:51,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:37:51,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:37:51,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:37:51,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:37:51,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 699 transitions, 12469 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:37:51,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:37:51,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:37:51,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:37:52,962 INFO L124 PetriNetUnfolderBase]: 3205/5447 cut-off events. [2024-06-20 15:37:52,962 INFO L125 PetriNetUnfolderBase]: For 1288178/1288178 co-relation queries the response was YES. [2024-06-20 15:37:53,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49620 conditions, 5447 events. 3205/5447 cut-off events. For 1288178/1288178 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 36799 event pairs, 618 based on Foata normal form. 2/5434 useless extension candidates. Maximal degree in co-relation 49385. Up to 4723 conditions per place. [2024-06-20 15:37:53,053 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 613 selfloop transitions, 99 changer transitions 0/720 dead transitions. [2024-06-20 15:37:53,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 720 transitions, 13959 flow [2024-06-20 15:37:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:37:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:37:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-20 15:37:53,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-20 15:37:53,054 INFO L175 Difference]: Start difference. First operand has 522 places, 699 transitions, 12469 flow. Second operand 10 states and 221 transitions. [2024-06-20 15:37:53,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 720 transitions, 13959 flow [2024-06-20 15:38:02,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 720 transitions, 13721 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:38:02,356 INFO L231 Difference]: Finished difference. Result has 527 places, 699 transitions, 12434 flow [2024-06-20 15:38:02,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12231, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12434, PETRI_PLACES=527, PETRI_TRANSITIONS=699} [2024-06-20 15:38:02,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-20 15:38:02,357 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 699 transitions, 12434 flow [2024-06-20 15:38:02,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:38:02,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:02,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:38:02,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-20 15:38:02,357 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:02,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash 750432929, now seen corresponding path program 6 times [2024-06-20 15:38:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:02,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164985516] [2024-06-20 15:38:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:02,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:02,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:02,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164985516] [2024-06-20 15:38:02,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164985516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:02,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:02,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:38:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686000164] [2024-06-20 15:38:02,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:02,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:38:02,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:38:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:38:02,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:38:02,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 699 transitions, 12434 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:38:02,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:02,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:38:02,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:03,892 INFO L124 PetriNetUnfolderBase]: 3213/5469 cut-off events. [2024-06-20 15:38:03,892 INFO L125 PetriNetUnfolderBase]: For 1304731/1304741 co-relation queries the response was YES. [2024-06-20 15:38:03,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49809 conditions, 5469 events. 3213/5469 cut-off events. For 1304731/1304741 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37102 event pairs, 614 based on Foata normal form. 2/5465 useless extension candidates. Maximal degree in co-relation 49573. Up to 4860 conditions per place. [2024-06-20 15:38:03,989 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 659 selfloop transitions, 50 changer transitions 0/717 dead transitions. [2024-06-20 15:38:03,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 717 transitions, 13976 flow [2024-06-20 15:38:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:38:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:38:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:38:03,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-20 15:38:03,990 INFO L175 Difference]: Start difference. First operand has 527 places, 699 transitions, 12434 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:38:03,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 717 transitions, 13976 flow [2024-06-20 15:38:13,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 717 transitions, 13773 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 15:38:13,427 INFO L231 Difference]: Finished difference. Result has 527 places, 701 transitions, 12420 flow [2024-06-20 15:38:13,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12231, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12420, PETRI_PLACES=527, PETRI_TRANSITIONS=701} [2024-06-20 15:38:13,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-20 15:38:13,428 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 701 transitions, 12420 flow [2024-06-20 15:38:13,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:38:13,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:13,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:38:13,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-20 15:38:13,429 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:13,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:13,429 INFO L85 PathProgramCache]: Analyzing trace with hash 765670049, now seen corresponding path program 7 times [2024-06-20 15:38:13,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:13,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816534172] [2024-06-20 15:38:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:13,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:13,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:13,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816534172] [2024-06-20 15:38:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816534172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:13,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:13,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:38:13,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193651173] [2024-06-20 15:38:13,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:13,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:38:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:38:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:38:13,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:38:13,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 701 transitions, 12420 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:38:13,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:13,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:38:13,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:14,922 INFO L124 PetriNetUnfolderBase]: 3221/5475 cut-off events. [2024-06-20 15:38:14,922 INFO L125 PetriNetUnfolderBase]: For 1321927/1321937 co-relation queries the response was YES. [2024-06-20 15:38:15,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50012 conditions, 5475 events. 3221/5475 cut-off events. For 1321927/1321937 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 37095 event pairs, 608 based on Foata normal form. 2/5471 useless extension candidates. Maximal degree in co-relation 49775. Up to 4858 conditions per place. [2024-06-20 15:38:15,023 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 659 selfloop transitions, 54 changer transitions 0/721 dead transitions. [2024-06-20 15:38:15,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 721 transitions, 13978 flow [2024-06-20 15:38:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:38:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:38:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-20 15:38:15,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-20 15:38:15,024 INFO L175 Difference]: Start difference. First operand has 527 places, 701 transitions, 12420 flow. Second operand 9 states and 201 transitions. [2024-06-20 15:38:15,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 721 transitions, 13978 flow [2024-06-20 15:38:24,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 721 transitions, 13805 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 15:38:24,924 INFO L231 Difference]: Finished difference. Result has 530 places, 703 transitions, 12448 flow [2024-06-20 15:38:24,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12247, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12448, PETRI_PLACES=530, PETRI_TRANSITIONS=703} [2024-06-20 15:38:24,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-20 15:38:24,925 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 703 transitions, 12448 flow [2024-06-20 15:38:24,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:38:24,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:24,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:38:24,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-20 15:38:24,925 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:24,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:24,926 INFO L85 PathProgramCache]: Analyzing trace with hash 322336259, now seen corresponding path program 8 times [2024-06-20 15:38:24,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:24,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804230917] [2024-06-20 15:38:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:24,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:25,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:25,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804230917] [2024-06-20 15:38:25,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804230917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:25,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:25,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:38:25,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462089586] [2024-06-20 15:38:25,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:25,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:38:25,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:25,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:38:25,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:38:25,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:38:25,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 703 transitions, 12448 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:38:25,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:25,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:38:25,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:26,536 INFO L124 PetriNetUnfolderBase]: 3229/5474 cut-off events. [2024-06-20 15:38:26,536 INFO L125 PetriNetUnfolderBase]: For 1339805/1339805 co-relation queries the response was YES. [2024-06-20 15:38:26,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50244 conditions, 5474 events. 3229/5474 cut-off events. For 1339805/1339805 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 36999 event pairs, 652 based on Foata normal form. 2/5452 useless extension candidates. Maximal degree in co-relation 50006. Up to 4613 conditions per place. [2024-06-20 15:38:26,719 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 200 changer transitions 0/724 dead transitions. [2024-06-20 15:38:26,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 724 transitions, 14030 flow [2024-06-20 15:38:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:38:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:38:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:38:26,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-20 15:38:26,720 INFO L175 Difference]: Start difference. First operand has 530 places, 703 transitions, 12448 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:38:26,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 724 transitions, 14030 flow [2024-06-20 15:38:37,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 724 transitions, 13845 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-20 15:38:37,084 INFO L231 Difference]: Finished difference. Result has 531 places, 705 transitions, 12760 flow [2024-06-20 15:38:37,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12263, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12760, PETRI_PLACES=531, PETRI_TRANSITIONS=705} [2024-06-20 15:38:37,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-20 15:38:37,084 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 705 transitions, 12760 flow [2024-06-20 15:38:37,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:38:37,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:37,084 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] [2024-06-20 15:38:37,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-20 15:38:37,085 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:37,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:37,085 INFO L85 PathProgramCache]: Analyzing trace with hash 401353383, now seen corresponding path program 15 times [2024-06-20 15:38:37,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:37,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440522392] [2024-06-20 15:38:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:37,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:37,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:37,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440522392] [2024-06-20 15:38:37,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440522392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:37,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:37,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:38:37,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839709894] [2024-06-20 15:38:37,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:37,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:38:37,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:37,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:38:37,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:38:37,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:38:37,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 705 transitions, 12760 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:37,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:37,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:38:37,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:38,814 INFO L124 PetriNetUnfolderBase]: 3224/5477 cut-off events. [2024-06-20 15:38:38,814 INFO L125 PetriNetUnfolderBase]: For 1328676/1328678 co-relation queries the response was YES. [2024-06-20 15:38:38,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50249 conditions, 5477 events. 3224/5477 cut-off events. For 1328676/1328678 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 37057 event pairs, 571 based on Foata normal form. 2/5477 useless extension candidates. Maximal degree in co-relation 50010. Up to 4508 conditions per place. [2024-06-20 15:38:38,903 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 621 selfloop transitions, 112 changer transitions 0/741 dead transitions. [2024-06-20 15:38:38,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 741 transitions, 14362 flow [2024-06-20 15:38:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:38:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:38:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:38:38,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:38:38,904 INFO L175 Difference]: Start difference. First operand has 531 places, 705 transitions, 12760 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:38:38,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 741 transitions, 14362 flow [2024-06-20 15:38:46,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 741 transitions, 13875 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-20 15:38:46,681 INFO L231 Difference]: Finished difference. Result has 533 places, 705 transitions, 12523 flow [2024-06-20 15:38:46,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12273, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12523, PETRI_PLACES=533, PETRI_TRANSITIONS=705} [2024-06-20 15:38:46,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-20 15:38:46,681 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 705 transitions, 12523 flow [2024-06-20 15:38:46,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:46,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:46,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:38:46,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-20 15:38:46,682 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:46,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:46,682 INFO L85 PathProgramCache]: Analyzing trace with hash 657853893, now seen corresponding path program 16 times [2024-06-20 15:38:46,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:46,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069548389] [2024-06-20 15:38:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:46,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:46,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:46,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069548389] [2024-06-20 15:38:46,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069548389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:46,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:46,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:38:46,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86903872] [2024-06-20 15:38:46,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:46,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:38:46,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:46,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:38:46,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:38:46,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:38:46,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 705 transitions, 12523 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:46,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:46,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:38:46,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:48,380 INFO L124 PetriNetUnfolderBase]: 3219/5468 cut-off events. [2024-06-20 15:38:48,380 INFO L125 PetriNetUnfolderBase]: For 1318764/1318764 co-relation queries the response was YES. [2024-06-20 15:38:48,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49801 conditions, 5468 events. 3219/5468 cut-off events. For 1318764/1318764 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 36993 event pairs, 589 based on Foata normal form. 2/5457 useless extension candidates. Maximal degree in co-relation 49561. Up to 4684 conditions per place. [2024-06-20 15:38:48,482 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 619 selfloop transitions, 105 changer transitions 0/732 dead transitions. [2024-06-20 15:38:48,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 732 transitions, 14063 flow [2024-06-20 15:38:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:38:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:38:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:38:48,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:38:48,483 INFO L175 Difference]: Start difference. First operand has 533 places, 705 transitions, 12523 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:38:48,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 732 transitions, 14063 flow [2024-06-20 15:38:56,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 732 transitions, 13854 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:38:57,007 INFO L231 Difference]: Finished difference. Result has 534 places, 705 transitions, 12533 flow [2024-06-20 15:38:57,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12314, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12533, PETRI_PLACES=534, PETRI_TRANSITIONS=705} [2024-06-20 15:38:57,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-20 15:38:57,008 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 705 transitions, 12533 flow [2024-06-20 15:38:57,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:57,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:57,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:38:57,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-20 15:38:57,008 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:57,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash 667377093, now seen corresponding path program 17 times [2024-06-20 15:38:57,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:57,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615147830] [2024-06-20 15:38:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:57,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:57,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:57,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615147830] [2024-06-20 15:38:57,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615147830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:57,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:57,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:38:57,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720208948] [2024-06-20 15:38:57,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:57,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:38:57,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:57,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:38:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:38:57,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:38:57,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 705 transitions, 12533 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:57,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:57,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:38:57,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:58,746 INFO L124 PetriNetUnfolderBase]: 3214/5478 cut-off events. [2024-06-20 15:38:58,746 INFO L125 PetriNetUnfolderBase]: For 1279082/1279082 co-relation queries the response was YES. [2024-06-20 15:38:58,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49297 conditions, 5478 events. 3214/5478 cut-off events. For 1279082/1279082 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 37150 event pairs, 504 based on Foata normal form. 2/5467 useless extension candidates. Maximal degree in co-relation 49057. Up to 4412 conditions per place. [2024-06-20 15:38:58,846 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 608 selfloop transitions, 120 changer transitions 0/736 dead transitions. [2024-06-20 15:38:58,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 736 transitions, 14109 flow [2024-06-20 15:38:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:38:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:38:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:38:58,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-20 15:38:58,847 INFO L175 Difference]: Start difference. First operand has 534 places, 705 transitions, 12533 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:38:58,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 736 transitions, 14109 flow [2024-06-20 15:39:09,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 736 transitions, 13864 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:39:09,831 INFO L231 Difference]: Finished difference. Result has 535 places, 705 transitions, 12536 flow [2024-06-20 15:39:09,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12288, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12536, PETRI_PLACES=535, PETRI_TRANSITIONS=705} [2024-06-20 15:39:09,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-20 15:39:09,831 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 705 transitions, 12536 flow [2024-06-20 15:39:09,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:09,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:39:09,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:39:09,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-20 15:39:09,831 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:39:09,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:39:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash 401538081, now seen corresponding path program 9 times [2024-06-20 15:39:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:39:09,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677352656] [2024-06-20 15:39:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:39:09,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:39:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:39:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:39:09,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:39:09,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677352656] [2024-06-20 15:39:09,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677352656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:39:09,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:39:09,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:39:09,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869444988] [2024-06-20 15:39:09,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:39:09,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:39:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:39:09,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:39:09,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:39:09,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:39:09,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 705 transitions, 12536 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:39:09,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:39:09,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:39:09,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:39:11,571 INFO L124 PetriNetUnfolderBase]: 3222/5458 cut-off events. [2024-06-20 15:39:11,571 INFO L125 PetriNetUnfolderBase]: For 1296762/1296762 co-relation queries the response was YES. [2024-06-20 15:39:11,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49639 conditions, 5458 events. 3222/5458 cut-off events. For 1296762/1296762 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 36866 event pairs, 589 based on Foata normal form. 2/5447 useless extension candidates. Maximal degree in co-relation 49398. Up to 4577 conditions per place. [2024-06-20 15:39:11,665 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 535 selfloop transitions, 190 changer transitions 0/733 dead transitions. [2024-06-20 15:39:11,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 733 transitions, 14482 flow [2024-06-20 15:39:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:39:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:39:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:39:11,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:39:11,666 INFO L175 Difference]: Start difference. First operand has 535 places, 705 transitions, 12536 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:39:11,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 733 transitions, 14482 flow [2024-06-20 15:39:21,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 733 transitions, 14231 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:39:21,584 INFO L231 Difference]: Finished difference. Result has 536 places, 707 transitions, 12766 flow [2024-06-20 15:39:21,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12285, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12766, PETRI_PLACES=536, PETRI_TRANSITIONS=707} [2024-06-20 15:39:21,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 494 predicate places. [2024-06-20 15:39:21,584 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 707 transitions, 12766 flow [2024-06-20 15:39:21,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:39:21,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:39:21,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:39:21,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-20 15:39:21,585 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:39:21,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:39:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash -623922143, now seen corresponding path program 10 times [2024-06-20 15:39:21,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:39:21,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378020985] [2024-06-20 15:39:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:39:21,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:39:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:39:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:39:21,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:39:21,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378020985] [2024-06-20 15:39:21,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378020985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:39:21,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:39:21,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:39:21,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202047115] [2024-06-20 15:39:21,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:39:21,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:39:21,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:39:21,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:39:21,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:39:21,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:39:21,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 707 transitions, 12766 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:39:21,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:39:21,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:39:21,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:39:23,281 INFO L124 PetriNetUnfolderBase]: 3258/5540 cut-off events. [2024-06-20 15:39:23,281 INFO L125 PetriNetUnfolderBase]: For 1425145/1425147 co-relation queries the response was YES. [2024-06-20 15:39:23,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50694 conditions, 5540 events. 3258/5540 cut-off events. For 1425145/1425147 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 37529 event pairs, 585 based on Foata normal form. 10/5548 useless extension candidates. Maximal degree in co-relation 50454. Up to 4563 conditions per place. [2024-06-20 15:39:23,378 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 545 selfloop transitions, 191 changer transitions 0/744 dead transitions. [2024-06-20 15:39:23,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 744 transitions, 14788 flow [2024-06-20 15:39:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:39:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:39:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-20 15:39:23,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-06-20 15:39:23,379 INFO L175 Difference]: Start difference. First operand has 536 places, 707 transitions, 12766 flow. Second operand 9 states and 227 transitions. [2024-06-20 15:39:23,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 744 transitions, 14788 flow [2024-06-20 15:39:33,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 744 transitions, 14323 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 15:39:33,628 INFO L231 Difference]: Finished difference. Result has 539 places, 709 transitions, 12795 flow [2024-06-20 15:39:33,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12301, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12795, PETRI_PLACES=539, PETRI_TRANSITIONS=709} [2024-06-20 15:39:33,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 497 predicate places. [2024-06-20 15:39:33,628 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 709 transitions, 12795 flow [2024-06-20 15:39:33,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:39:33,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:39:33,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:39:33,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-20 15:39:33,629 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:39:33,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:39:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash 414050301, now seen corresponding path program 11 times [2024-06-20 15:39:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:39:33,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633579425] [2024-06-20 15:39:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:39:33,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:39:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:39:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:39:33,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:39:33,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633579425] [2024-06-20 15:39:33,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633579425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:39:33,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:39:33,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:39:33,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473504071] [2024-06-20 15:39:33,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:39:33,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:39:33,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:39:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:39:33,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:39:33,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:39:33,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 709 transitions, 12795 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:39:33,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:39:33,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:39:33,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:39:35,314 INFO L124 PetriNetUnfolderBase]: 3266/5553 cut-off events. [2024-06-20 15:39:35,314 INFO L125 PetriNetUnfolderBase]: For 1343453/1343463 co-relation queries the response was YES. [2024-06-20 15:39:35,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50998 conditions, 5553 events. 3266/5553 cut-off events. For 1343453/1343463 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 37687 event pairs, 602 based on Foata normal form. 2/5553 useless extension candidates. Maximal degree in co-relation 50757. Up to 4964 conditions per place. [2024-06-20 15:39:35,407 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 689 selfloop transitions, 33 changer transitions 0/730 dead transitions. [2024-06-20 15:39:35,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 730 transitions, 14393 flow [2024-06-20 15:39:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:39:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:39:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:39:35,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-20 15:39:35,408 INFO L175 Difference]: Start difference. First operand has 539 places, 709 transitions, 12795 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:39:35,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 730 transitions, 14393 flow [2024-06-20 15:39:47,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 730 transitions, 13941 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-20 15:39:47,865 INFO L231 Difference]: Finished difference. Result has 540 places, 711 transitions, 12518 flow [2024-06-20 15:39:47,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12343, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12518, PETRI_PLACES=540, PETRI_TRANSITIONS=711} [2024-06-20 15:39:47,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-20 15:39:47,865 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 711 transitions, 12518 flow [2024-06-20 15:39:47,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:39:47,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:39:47,865 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] [2024-06-20 15:39:47,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-20 15:39:47,866 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:39:47,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:39:47,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1311981539, now seen corresponding path program 12 times [2024-06-20 15:39:47,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:39:47,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502488004] [2024-06-20 15:39:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:39:47,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:39:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:39:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:39:47,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:39:47,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502488004] [2024-06-20 15:39:47,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502488004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:39:47,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:39:47,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:39:47,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544660656] [2024-06-20 15:39:47,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:39:47,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:39:47,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:39:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:39:47,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:39:48,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:39:48,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 711 transitions, 12518 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:39:48,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:39:48,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:39:48,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:39:49,600 INFO L124 PetriNetUnfolderBase]: 3274/5562 cut-off events. [2024-06-20 15:39:49,600 INFO L125 PetriNetUnfolderBase]: For 1347581/1347583 co-relation queries the response was YES. [2024-06-20 15:39:49,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50360 conditions, 5562 events. 3274/5562 cut-off events. For 1347581/1347583 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 37714 event pairs, 597 based on Foata normal form. 2/5561 useless extension candidates. Maximal degree in co-relation 50118. Up to 4852 conditions per place. [2024-06-20 15:39:49,691 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 647 selfloop transitions, 84 changer transitions 0/739 dead transitions. [2024-06-20 15:39:49,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 739 transitions, 14170 flow [2024-06-20 15:39:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:39:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:39:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:39:49,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:39:49,692 INFO L175 Difference]: Start difference. First operand has 540 places, 711 transitions, 12518 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:39:49,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 739 transitions, 14170 flow [2024-06-20 15:39:58,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 739 transitions, 14011 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-20 15:39:58,919 INFO L231 Difference]: Finished difference. Result has 541 places, 713 transitions, 12640 flow [2024-06-20 15:39:58,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12359, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12640, PETRI_PLACES=541, PETRI_TRANSITIONS=713} [2024-06-20 15:39:58,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 499 predicate places. [2024-06-20 15:39:58,919 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 713 transitions, 12640 flow [2024-06-20 15:39:58,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:39:58,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:39:58,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:39:58,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-20 15:39:58,919 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:39:58,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:39:58,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1303410659, now seen corresponding path program 13 times [2024-06-20 15:39:58,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:39:58,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392233811] [2024-06-20 15:39:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:39:58,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:39:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:39:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:39:59,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:39:59,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392233811] [2024-06-20 15:39:59,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392233811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:39:59,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:39:59,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:39:59,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686405016] [2024-06-20 15:39:59,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:39:59,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:39:59,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:39:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:39:59,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:39:59,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:39:59,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 713 transitions, 12640 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:39:59,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:39:59,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:39:59,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:00,769 INFO L124 PetriNetUnfolderBase]: 3341/5653 cut-off events. [2024-06-20 15:40:00,769 INFO L125 PetriNetUnfolderBase]: For 1507886/1507888 co-relation queries the response was YES. [2024-06-20 15:40:00,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53342 conditions, 5653 events. 3341/5653 cut-off events. For 1507886/1507888 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 38306 event pairs, 596 based on Foata normal form. 2/5653 useless extension candidates. Maximal degree in co-relation 53099. Up to 4793 conditions per place. [2024-06-20 15:40:00,885 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 651 selfloop transitions, 89 changer transitions 0/748 dead transitions. [2024-06-20 15:40:00,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 748 transitions, 14786 flow [2024-06-20 15:40:00,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:40:00,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:40:00,886 INFO L175 Difference]: Start difference. First operand has 541 places, 713 transitions, 12640 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:40:00,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 748 transitions, 14786 flow [2024-06-20 15:40:10,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 748 transitions, 14521 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-20 15:40:10,820 INFO L231 Difference]: Finished difference. Result has 544 places, 717 transitions, 12752 flow [2024-06-20 15:40:10,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12375, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12752, PETRI_PLACES=544, PETRI_TRANSITIONS=717} [2024-06-20 15:40:10,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-20 15:40:10,821 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 717 transitions, 12752 flow [2024-06-20 15:40:10,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:40:10,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:10,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:10,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-20 15:40:10,821 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:10,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash -396020993, now seen corresponding path program 14 times [2024-06-20 15:40:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:10,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140342576] [2024-06-20 15:40:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:10,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:10,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:10,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140342576] [2024-06-20 15:40:10,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140342576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:10,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:10,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:10,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612619173] [2024-06-20 15:40:10,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:10,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:10,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:10,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:10,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:10,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:40:10,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 717 transitions, 12752 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:40:10,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:10,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:40:10,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:12,644 INFO L124 PetriNetUnfolderBase]: 3377/5719 cut-off events. [2024-06-20 15:40:12,644 INFO L125 PetriNetUnfolderBase]: For 1641854/1641856 co-relation queries the response was YES. [2024-06-20 15:40:12,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54452 conditions, 5719 events. 3377/5719 cut-off events. For 1641854/1641856 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 38898 event pairs, 598 based on Foata normal form. 10/5727 useless extension candidates. Maximal degree in co-relation 54207. Up to 4744 conditions per place. [2024-06-20 15:40:12,743 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 187 changer transitions 0/751 dead transitions. [2024-06-20 15:40:12,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 751 transitions, 14798 flow [2024-06-20 15:40:12,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:40:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:40:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-20 15:40:12,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5926829268292683 [2024-06-20 15:40:12,744 INFO L175 Difference]: Start difference. First operand has 544 places, 717 transitions, 12752 flow. Second operand 10 states and 243 transitions. [2024-06-20 15:40:12,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 751 transitions, 14798 flow [2024-06-20 15:40:24,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 751 transitions, 14596 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:24,397 INFO L231 Difference]: Finished difference. Result has 551 places, 719 transitions, 13052 flow [2024-06-20 15:40:24,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12550, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13052, PETRI_PLACES=551, PETRI_TRANSITIONS=719} [2024-06-20 15:40:24,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-20 15:40:24,397 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 719 transitions, 13052 flow [2024-06-20 15:40:24,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:40:24,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:24,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:24,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-20 15:40:24,397 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:24,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2020706097, now seen corresponding path program 15 times [2024-06-20 15:40:24,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:24,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711276] [2024-06-20 15:40:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:24,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:24,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711276] [2024-06-20 15:40:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:24,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:24,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:24,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788095768] [2024-06-20 15:40:24,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:24,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:24,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:24,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:24,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:24,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:40:24,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 719 transitions, 13052 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:40:24,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:24,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:40:24,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:26,284 INFO L124 PetriNetUnfolderBase]: 3372/5716 cut-off events. [2024-06-20 15:40:26,284 INFO L125 PetriNetUnfolderBase]: For 1525648/1525650 co-relation queries the response was YES. [2024-06-20 15:40:26,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54424 conditions, 5716 events. 3372/5716 cut-off events. For 1525648/1525650 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 38940 event pairs, 615 based on Foata normal form. 2/5715 useless extension candidates. Maximal degree in co-relation 54177. Up to 4996 conditions per place. [2024-06-20 15:40:26,391 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 652 selfloop transitions, 95 changer transitions 0/755 dead transitions. [2024-06-20 15:40:26,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 755 transitions, 14769 flow [2024-06-20 15:40:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:40:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:40:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-20 15:40:26,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-20 15:40:26,392 INFO L175 Difference]: Start difference. First operand has 551 places, 719 transitions, 13052 flow. Second operand 9 states and 223 transitions. [2024-06-20 15:40:26,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 755 transitions, 14769 flow [2024-06-20 15:40:36,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 755 transitions, 14309 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-20 15:40:36,680 INFO L231 Difference]: Finished difference. Result has 552 places, 721 transitions, 12905 flow [2024-06-20 15:40:36,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12592, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12905, PETRI_PLACES=552, PETRI_TRANSITIONS=721} [2024-06-20 15:40:36,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 510 predicate places. [2024-06-20 15:40:36,681 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 721 transitions, 12905 flow [2024-06-20 15:40:36,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:40:36,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:36,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:36,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-20 15:40:36,681 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:36,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:36,681 INFO L85 PathProgramCache]: Analyzing trace with hash 814544925, now seen corresponding path program 16 times [2024-06-20 15:40:36,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:36,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689362204] [2024-06-20 15:40:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:36,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:36,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:36,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689362204] [2024-06-20 15:40:36,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689362204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:36,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:36,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:36,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742676922] [2024-06-20 15:40:36,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:36,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:36,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:36,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:40:36,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 721 transitions, 12905 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:40:36,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:36,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:40:36,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:38,587 INFO L124 PetriNetUnfolderBase]: 3380/5726 cut-off events. [2024-06-20 15:40:38,587 INFO L125 PetriNetUnfolderBase]: For 1532953/1532955 co-relation queries the response was YES. [2024-06-20 15:40:38,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53929 conditions, 5726 events. 3380/5726 cut-off events. For 1532953/1532955 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38967 event pairs, 613 based on Foata normal form. 2/5725 useless extension candidates. Maximal degree in co-relation 53681. Up to 4986 conditions per place. [2024-06-20 15:40:38,687 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 646 selfloop transitions, 101 changer transitions 0/755 dead transitions. [2024-06-20 15:40:38,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 755 transitions, 14619 flow [2024-06-20 15:40:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:40:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:40:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-20 15:40:38,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 15:40:38,688 INFO L175 Difference]: Start difference. First operand has 552 places, 721 transitions, 12905 flow. Second operand 9 states and 219 transitions. [2024-06-20 15:40:38,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 755 transitions, 14619 flow [2024-06-20 15:40:50,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 755 transitions, 14335 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 15:40:50,715 INFO L231 Difference]: Finished difference. Result has 554 places, 723 transitions, 12950 flow [2024-06-20 15:40:50,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12621, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12950, PETRI_PLACES=554, PETRI_TRANSITIONS=723} [2024-06-20 15:40:50,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 512 predicate places. [2024-06-20 15:40:50,716 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 723 transitions, 12950 flow [2024-06-20 15:40:50,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:40:50,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:50,716 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] [2024-06-20 15:40:50,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-20 15:40:50,716 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:50,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash 454559773, now seen corresponding path program 17 times [2024-06-20 15:40:50,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:50,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634129853] [2024-06-20 15:40:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:50,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:50,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634129853] [2024-06-20 15:40:50,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634129853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:50,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:50,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:50,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274542032] [2024-06-20 15:40:50,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:50,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:50,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:50,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:40:50,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 723 transitions, 12950 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:40:50,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:50,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:40:50,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:52,613 INFO L124 PetriNetUnfolderBase]: 3467/5897 cut-off events. [2024-06-20 15:40:52,613 INFO L125 PetriNetUnfolderBase]: For 1697895/1697897 co-relation queries the response was YES. [2024-06-20 15:40:52,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57142 conditions, 5897 events. 3467/5897 cut-off events. For 1697895/1697897 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 40488 event pairs, 528 based on Foata normal form. 2/5897 useless extension candidates. Maximal degree in co-relation 56893. Up to 4732 conditions per place. [2024-06-20 15:40:52,719 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 654 selfloop transitions, 106 changer transitions 0/768 dead transitions. [2024-06-20 15:40:52,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 768 transitions, 15552 flow [2024-06-20 15:40:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:40:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:40:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-20 15:40:52,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:40:52,720 INFO L175 Difference]: Start difference. First operand has 554 places, 723 transitions, 12950 flow. Second operand 8 states and 212 transitions. [2024-06-20 15:40:52,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 768 transitions, 15552 flow [2024-06-20 15:41:04,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 768 transitions, 15239 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:04,615 INFO L231 Difference]: Finished difference. Result has 557 places, 728 transitions, 13105 flow [2024-06-20 15:41:04,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12637, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13105, PETRI_PLACES=557, PETRI_TRANSITIONS=728} [2024-06-20 15:41:04,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 515 predicate places. [2024-06-20 15:41:04,615 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 728 transitions, 13105 flow [2024-06-20 15:41:04,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:41:04,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:04,616 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] [2024-06-20 15:41:04,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-20 15:41:04,616 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:04,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash -92666459, now seen corresponding path program 18 times [2024-06-20 15:41:04,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:04,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944490489] [2024-06-20 15:41:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:04,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:04,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:04,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944490489] [2024-06-20 15:41:04,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944490489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:04,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:04,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:41:04,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266240748] [2024-06-20 15:41:04,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:04,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:41:04,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:41:04,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:41:04,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:41:04,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 728 transitions, 13105 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-20 15:41:04,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:04,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:41:04,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:06,664 INFO L124 PetriNetUnfolderBase]: 3663/6199 cut-off events. [2024-06-20 15:41:06,664 INFO L125 PetriNetUnfolderBase]: For 2263339/2263341 co-relation queries the response was YES. [2024-06-20 15:41:06,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65024 conditions, 6199 events. 3663/6199 cut-off events. For 2263339/2263341 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42449 event pairs, 716 based on Foata normal form. 10/6207 useless extension candidates. Maximal degree in co-relation 64772. Up to 4214 conditions per place. [2024-06-20 15:41:06,778 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 568 selfloop transitions, 195 changer transitions 0/771 dead transitions. [2024-06-20 15:41:06,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 771 transitions, 15657 flow [2024-06-20 15:41:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:41:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:41:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-20 15:41:06,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6073170731707317 [2024-06-20 15:41:06,779 INFO L175 Difference]: Start difference. First operand has 557 places, 728 transitions, 13105 flow. Second operand 10 states and 249 transitions. [2024-06-20 15:41:06,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 771 transitions, 15657 flow Killed by 15