./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe015_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-eb4cb34-m [2024-06-21 15:50:48,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:50:48,996 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:50:49,005 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:50:49,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:50:49,037 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:50:49,038 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:50:49,038 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:50:49,039 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:50:49,043 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:50:49,043 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:50:49,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:50:49,044 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:50:49,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:50:49,046 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:50:49,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:50:49,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:50:49,047 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:50:49,047 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:50:49,047 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:50:49,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:50:49,048 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:50:49,048 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:50:49,048 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:50:49,049 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:50:49,049 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:50:49,049 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:50:49,049 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:50:49,050 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:50:49,050 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:50:49,051 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:50:49,051 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:50:49,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:50:49,052 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:50:49,052 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:50:49,052 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:50:49,052 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:50:49,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:50:49,053 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:50:49,053 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:50:49,053 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:50:49,053 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:50:49,054 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:50:49,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:50:49,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:50:49,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:50:49,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:50:49,351 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:50:49,352 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:50:49,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:50:50,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:50:50,734 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:50:50,735 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:50:50,747 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4303c2d8/e4c7386bc0614d4fa04262749b31c459/FLAG4eb18c063 [2024-06-21 15:50:50,763 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4303c2d8/e4c7386bc0614d4fa04262749b31c459 [2024-06-21 15:50:50,765 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:50:50,765 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:50:50,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 15:50:50,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:50:50,867 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:50:50,868 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:50:50,868 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:50:50,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:50:50,874 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:50:50" (1/2) ... [2024-06-21 15:50:50,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35165acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:50:50, skipping insertion in model container [2024-06-21 15:50:50,875 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:50:50" (1/2) ... [2024-06-21 15:50:50,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9fcb998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:50:50, skipping insertion in model container [2024-06-21 15:50:50,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:50:50" (2/2) ... [2024-06-21 15:50:50,877 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35165acd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:50, skipping insertion in model container [2024-06-21 15:50:50,877 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:50:50" (2/2) ... [2024-06-21 15:50:50,878 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:50:50,922 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:50:50,924 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 15:50:50,924 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 15:50:50,924 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 15:50:50,924 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:50:50,925 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-21 15:50:50,970 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:50:51,352 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:50:51,362 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:50:51,439 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:50:51,474 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:50:51,474 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51 WrapperNode [2024-06-21 15:50:51,474 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:50:51,475 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:50:51,475 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:50:51,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:50:51,482 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 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,493 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 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,514 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-21 15:50:51,514 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:50:51,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:50:51,515 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:50:51,515 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:50:51,524 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,527 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,541 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]. [2024-06-21 15:50:51,542 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,551 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,552 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:50:51,556 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:50:51,556 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:50:51,556 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:50:51,557 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (1/1) ... [2024-06-21 15:50:51,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:50:51,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:50:51,595 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) [2024-06-21 15:50:51,622 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 [2024-06-21 15:50:51,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:50:51,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:50:51,657 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 15:50:51,657 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 15:50:51,658 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 15:50:51,658 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 15:50:51,658 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 15:50:51,658 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 15:50:51,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:50:51,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:50:51,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:50:51,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:50:51,660 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:50:51,754 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:50:51,756 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:50:51,916 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:50:51,916 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:50:52,022 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:50:52,022 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 15:50:52,023 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:50:52 BoogieIcfgContainer [2024-06-21 15:50:52,023 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:50:52,025 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:50:52,025 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:50:52,028 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:50:52,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:50:50" (1/4) ... [2024-06-21 15:50:52,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fee4d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:50:52, skipping insertion in model container [2024-06-21 15:50:52,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:50:50" (2/4) ... [2024-06-21 15:50:52,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fee4d4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:50:52, skipping insertion in model container [2024-06-21 15:50:52,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:50:51" (3/4) ... [2024-06-21 15:50:52,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fee4d4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:50:52, skipping insertion in model container [2024-06-21 15:50:52,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:50:52" (4/4) ... [2024-06-21 15:50:52,031 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:50:52,048 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:50:52,049 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 15:50:52,049 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:50:52,094 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:50:52,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 15:50:52,156 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 15:50:52,156 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:50:52,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 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. [2024-06-21 15:50:52,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 15:50:52,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 15:50:52,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:50:52,177 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;@3973b912, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:50:52,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 15:50:52,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:50:52,181 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 15:50:52,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:50:52,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:52,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:50:52,183 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)] === [2024-06-21 15:50:52,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash 219931435, now seen corresponding path program 1 times [2024-06-21 15:50:52,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:52,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069433810] [2024-06-21 15:50:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:52,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:52,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:52,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069433810] [2024-06-21 15:50:52,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069433810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:52,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:52,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:50:52,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71941552] [2024-06-21 15:50:52,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:52,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:50:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:50:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:50:52,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 15:50:52,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:52,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:52,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 15:50:52,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:52,956 INFO L124 PetriNetUnfolderBase]: 603/1018 cut-off events. [2024-06-21 15:50:52,956 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 15:50:52,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 1018 events. 603/1018 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5139 event pairs, 376 based on Foata normal form. 1/962 useless extension candidates. Maximal degree in co-relation 1998. Up to 929 conditions per place. [2024-06-21 15:50:52,971 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 28 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 15:50:52,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 163 flow [2024-06-21 15:50:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:50:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:50:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-21 15:50:52,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2024-06-21 15:50:52,986 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 86 transitions. [2024-06-21 15:50:52,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 163 flow [2024-06-21 15:50:52,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:50:52,993 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 15:50:52,995 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} [2024-06-21 15:50:53,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 15:50:53,001 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 15:50:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:53,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:53,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:53,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:50:53,002 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)] === [2024-06-21 15:50:53,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash 900722890, now seen corresponding path program 1 times [2024-06-21 15:50:53,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:53,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923797326] [2024-06-21 15:50:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:53,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:53,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:53,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923797326] [2024-06-21 15:50:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923797326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:53,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:53,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:50:53,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808611964] [2024-06-21 15:50:53,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:53,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:50:53,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:50:53,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:50:53,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 15:50:53,225 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) [2024-06-21 15:50:53,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:53,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 15:50:53,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:53,384 INFO L124 PetriNetUnfolderBase]: 604/1028 cut-off events. [2024-06-21 15:50:53,384 INFO L125 PetriNetUnfolderBase]: For 201/209 co-relation queries the response was YES. [2024-06-21 15:50:53,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 1028 events. 604/1028 cut-off events. For 201/209 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5256 event pairs, 320 based on Foata normal form. 7/1009 useless extension candidates. Maximal degree in co-relation 2324. Up to 903 conditions per place. [2024-06-21 15:50:53,392 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 37 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2024-06-21 15:50:53,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 260 flow [2024-06-21 15:50:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:50:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:50:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-21 15:50:53,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134146341463414 [2024-06-21 15:50:53,398 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 117 transitions. [2024-06-21 15:50:53,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 260 flow [2024-06-21 15:50:53,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:50:53,402 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-21 15:50:53,402 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-21 15:50:53,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-21 15:50:53,403 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-21 15:50:53,404 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) [2024-06-21 15:50:53,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:53,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:53,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:50:53,405 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)] === [2024-06-21 15:50:53,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:53,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1616478059, now seen corresponding path program 1 times [2024-06-21 15:50:53,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:53,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131578726] [2024-06-21 15:50:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:53,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:53,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131578726] [2024-06-21 15:50:53,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131578726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:53,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:53,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:50:53,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31940250] [2024-06-21 15:50:53,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:53,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:50:53,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:53,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:50:53,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:50:53,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:53,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:53,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:53,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:53,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:53,741 INFO L124 PetriNetUnfolderBase]: 934/1513 cut-off events. [2024-06-21 15:50:53,741 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2024-06-21 15:50:53,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4062 conditions, 1513 events. 934/1513 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7562 event pairs, 515 based on Foata normal form. 2/1511 useless extension candidates. Maximal degree in co-relation 4047. Up to 1394 conditions per place. [2024-06-21 15:50:53,753 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2024-06-21 15:50:53,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 359 flow [2024-06-21 15:50:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:50:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:50:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-21 15:50:53,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 15:50:53,755 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 4 states and 106 transitions. [2024-06-21 15:50:53,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 359 flow [2024-06-21 15:50:53,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 355 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 15:50:53,759 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 248 flow [2024-06-21 15:50:53,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-06-21 15:50:53,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 15:50:53,760 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 248 flow [2024-06-21 15:50:53,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:53,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:53,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:53,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:50:53,761 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)] === [2024-06-21 15:50:53,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 135946248, now seen corresponding path program 1 times [2024-06-21 15:50:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934181849] [2024-06-21 15:50:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:53,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:53,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934181849] [2024-06-21 15:50:53,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934181849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:53,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:53,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:50:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730032416] [2024-06-21 15:50:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:53,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:50:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:50:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:50:53,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:50:53,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 248 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) [2024-06-21 15:50:53,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:53,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:50:53,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:54,191 INFO L124 PetriNetUnfolderBase]: 934/1538 cut-off events. [2024-06-21 15:50:54,192 INFO L125 PetriNetUnfolderBase]: For 1911/1932 co-relation queries the response was YES. [2024-06-21 15:50:54,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 1538 events. 934/1538 cut-off events. For 1911/1932 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7898 event pairs, 249 based on Foata normal form. 20/1539 useless extension candidates. Maximal degree in co-relation 4626. Up to 1283 conditions per place. [2024-06-21 15:50:54,205 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-21 15:50:54,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 510 flow [2024-06-21 15:50:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:50:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:50:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 15:50:54,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2024-06-21 15:50:54,209 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 248 flow. Second operand 6 states and 167 transitions. [2024-06-21 15:50:54,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 510 flow [2024-06-21 15:50:54,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 506 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 15:50:54,217 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 327 flow [2024-06-21 15:50:54,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-21 15:50:54,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-21 15:50:54,219 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 327 flow [2024-06-21 15:50:54,219 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) [2024-06-21 15:50:54,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:54,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:54,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:50:54,220 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)] === [2024-06-21 15:50:54,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1428789046, now seen corresponding path program 1 times [2024-06-21 15:50:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:54,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674016330] [2024-06-21 15:50:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:54,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:54,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674016330] [2024-06-21 15:50:54,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674016330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:54,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:54,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:50:54,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589610901] [2024-06-21 15:50:54,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:54,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:50:54,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:54,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:50:54,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:50:54,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:54,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:54,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:54,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:54,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:54,525 INFO L124 PetriNetUnfolderBase]: 953/1561 cut-off events. [2024-06-21 15:50:54,526 INFO L125 PetriNetUnfolderBase]: For 2704/2707 co-relation queries the response was YES. [2024-06-21 15:50:54,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5177 conditions, 1561 events. 953/1561 cut-off events. For 2704/2707 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7907 event pairs, 379 based on Foata normal form. 4/1562 useless extension candidates. Maximal degree in co-relation 5154. Up to 1429 conditions per place. [2024-06-21 15:50:54,540 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 51 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2024-06-21 15:50:54,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 480 flow [2024-06-21 15:50:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:50:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:50:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 15:50:54,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 15:50:54,543 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 327 flow. Second operand 4 states and 103 transitions. [2024-06-21 15:50:54,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 480 flow [2024-06-21 15:50:54,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 442 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:50:54,551 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 320 flow [2024-06-21 15:50:54,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-21 15:50:54,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-21 15:50:54,554 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 320 flow [2024-06-21 15:50:54,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:54,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:54,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:54,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:50:54,559 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)] === [2024-06-21 15:50:54,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash 588061642, now seen corresponding path program 1 times [2024-06-21 15:50:54,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:54,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50723719] [2024-06-21 15:50:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:54,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:54,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:54,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50723719] [2024-06-21 15:50:54,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50723719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:54,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:54,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:50:54,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604071633] [2024-06-21 15:50:54,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:54,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:50:54,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:54,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:50:54,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:50:54,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:54,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 320 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) [2024-06-21 15:50:54,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:54,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:54,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:54,916 INFO L124 PetriNetUnfolderBase]: 964/1573 cut-off events. [2024-06-21 15:50:54,916 INFO L125 PetriNetUnfolderBase]: For 3150/3150 co-relation queries the response was YES. [2024-06-21 15:50:54,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5241 conditions, 1573 events. 964/1573 cut-off events. For 3150/3150 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7862 event pairs, 354 based on Foata normal form. 2/1570 useless extension candidates. Maximal degree in co-relation 5217. Up to 1387 conditions per place. [2024-06-21 15:50:54,929 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-21 15:50:54,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 585 flow [2024-06-21 15:50:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:50:54,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:50:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 15:50:54,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-21 15:50:54,931 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 320 flow. Second operand 5 states and 133 transitions. [2024-06-21 15:50:54,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 585 flow [2024-06-21 15:50:54,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 573 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 15:50:54,938 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 404 flow [2024-06-21 15:50:54,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=404, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-21 15:50:54,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-21 15:50:54,940 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 404 flow [2024-06-21 15:50:54,941 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) [2024-06-21 15:50:54,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:54,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:54,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:50:54,941 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)] === [2024-06-21 15:50:54,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:54,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1367804332, now seen corresponding path program 2 times [2024-06-21 15:50:54,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:54,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127228111] [2024-06-21 15:50:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:54,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:55,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127228111] [2024-06-21 15:50:55,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127228111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:55,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:55,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:50:55,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853846573] [2024-06-21 15:50:55,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:55,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:50:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:55,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:50:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:50:55,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:55,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 404 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) [2024-06-21 15:50:55,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:55,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:55,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:55,252 INFO L124 PetriNetUnfolderBase]: 959/1559 cut-off events. [2024-06-21 15:50:55,252 INFO L125 PetriNetUnfolderBase]: For 4457/4457 co-relation queries the response was YES. [2024-06-21 15:50:55,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5731 conditions, 1559 events. 959/1559 cut-off events. For 4457/4457 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7799 event pairs, 355 based on Foata normal form. 2/1553 useless extension candidates. Maximal degree in co-relation 5704. Up to 1384 conditions per place. [2024-06-21 15:50:55,267 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 19 changer transitions 0/85 dead transitions. [2024-06-21 15:50:55,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 644 flow [2024-06-21 15:50:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:50:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:50:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 15:50:55,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-21 15:50:55,268 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 404 flow. Second operand 5 states and 129 transitions. [2024-06-21 15:50:55,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 644 flow [2024-06-21 15:50:55,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 624 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 15:50:55,275 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 452 flow [2024-06-21 15:50:55,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-21 15:50:55,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-21 15:50:55,276 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 452 flow [2024-06-21 15:50:55,277 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) [2024-06-21 15:50:55,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:55,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:55,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:50:55,277 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)] === [2024-06-21 15:50:55,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:55,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1593731481, now seen corresponding path program 1 times [2024-06-21 15:50:55,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:55,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315683173] [2024-06-21 15:50:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:55,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:55,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:55,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315683173] [2024-06-21 15:50:55,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315683173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:55,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:55,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:50:55,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119121816] [2024-06-21 15:50:55,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:55,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:50:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:55,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:50:55,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:50:55,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:55,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 452 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) [2024-06-21 15:50:55,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:55,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:55,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:55,604 INFO L124 PetriNetUnfolderBase]: 970/1591 cut-off events. [2024-06-21 15:50:55,604 INFO L125 PetriNetUnfolderBase]: For 5493/5493 co-relation queries the response was YES. [2024-06-21 15:50:55,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6102 conditions, 1591 events. 970/1591 cut-off events. For 5493/5493 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8029 event pairs, 349 based on Foata normal form. 2/1588 useless extension candidates. Maximal degree in co-relation 6073. Up to 1396 conditions per place. [2024-06-21 15:50:55,619 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 62 selfloop transitions, 21 changer transitions 0/91 dead transitions. [2024-06-21 15:50:55,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 719 flow [2024-06-21 15:50:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:50:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:50:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 15:50:55,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-21 15:50:55,626 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 452 flow. Second operand 5 states and 133 transitions. [2024-06-21 15:50:55,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 719 flow [2024-06-21 15:50:55,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 689 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 15:50:55,636 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 496 flow [2024-06-21 15:50:55,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-21 15:50:55,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-21 15:50:55,638 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 496 flow [2024-06-21 15:50:55,638 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) [2024-06-21 15:50:55,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:55,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:55,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:50:55,639 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)] === [2024-06-21 15:50:55,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:55,639 INFO L85 PathProgramCache]: Analyzing trace with hash -547470435, now seen corresponding path program 2 times [2024-06-21 15:50:55,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:55,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846134187] [2024-06-21 15:50:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:55,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:55,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:55,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846134187] [2024-06-21 15:50:55,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846134187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:55,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:55,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:50:55,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685387943] [2024-06-21 15:50:55,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:55,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:50:55,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:55,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:50:55,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:50:55,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:55,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 496 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) [2024-06-21 15:50:55,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:55,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:55,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:55,938 INFO L124 PetriNetUnfolderBase]: 965/1580 cut-off events. [2024-06-21 15:50:55,939 INFO L125 PetriNetUnfolderBase]: For 6618/6624 co-relation queries the response was YES. [2024-06-21 15:50:55,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6197 conditions, 1580 events. 965/1580 cut-off events. For 6618/6624 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7959 event pairs, 360 based on Foata normal form. 6/1579 useless extension candidates. Maximal degree in co-relation 6166. Up to 1391 conditions per place. [2024-06-21 15:50:55,954 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 58 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-21 15:50:55,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 700 flow [2024-06-21 15:50:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:50:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:50:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 15:50:55,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-21 15:50:55,955 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 496 flow. Second operand 5 states and 127 transitions. [2024-06-21 15:50:55,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 700 flow [2024-06-21 15:50:55,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 673 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 15:50:55,964 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 527 flow [2024-06-21 15:50:55,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=527, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-06-21 15:50:55,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-21 15:50:55,965 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 527 flow [2024-06-21 15:50:55,966 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) [2024-06-21 15:50:55,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:55,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:55,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:50:55,966 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)] === [2024-06-21 15:50:55,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash -547460515, now seen corresponding path program 1 times [2024-06-21 15:50:55,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:55,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102454598] [2024-06-21 15:50:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:55,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:56,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:56,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102454598] [2024-06-21 15:50:56,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102454598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:56,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:56,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:50:56,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352342698] [2024-06-21 15:50:56,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:56,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:50:56,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:56,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:50:56,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:50:56,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:56,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 527 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) [2024-06-21 15:50:56,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:56,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:56,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:56,271 INFO L124 PetriNetUnfolderBase]: 957/1573 cut-off events. [2024-06-21 15:50:56,271 INFO L125 PetriNetUnfolderBase]: For 7572/7578 co-relation queries the response was YES. [2024-06-21 15:50:56,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6281 conditions, 1573 events. 957/1573 cut-off events. For 7572/7578 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7904 event pairs, 329 based on Foata normal form. 8/1578 useless extension candidates. Maximal degree in co-relation 6249. Up to 1417 conditions per place. [2024-06-21 15:50:56,288 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 71 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-06-21 15:50:56,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 745 flow [2024-06-21 15:50:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:50:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:50:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 15:50:56,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:50:56,290 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 527 flow. Second operand 5 states and 125 transitions. [2024-06-21 15:50:56,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 745 flow [2024-06-21 15:50:56,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 717 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 15:50:56,300 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 546 flow [2024-06-21 15:50:56,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-21 15:50:56,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-21 15:50:56,301 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 546 flow [2024-06-21 15:50:56,301 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) [2024-06-21 15:50:56,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:56,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:56,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:50:56,301 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)] === [2024-06-21 15:50:56,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash -915316437, now seen corresponding path program 1 times [2024-06-21 15:50:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:56,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826040737] [2024-06-21 15:50:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:56,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:56,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:56,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826040737] [2024-06-21 15:50:56,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826040737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:56,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:56,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:50:56,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220706504] [2024-06-21 15:50:56,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:56,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:50:56,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:50:56,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:50:56,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:56,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 546 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) [2024-06-21 15:50:56,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:56,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:56,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:56,698 INFO L124 PetriNetUnfolderBase]: 1012/1669 cut-off events. [2024-06-21 15:50:56,699 INFO L125 PetriNetUnfolderBase]: For 9132/9132 co-relation queries the response was YES. [2024-06-21 15:50:56,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1669 events. 1012/1669 cut-off events. For 9132/9132 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8600 event pairs, 271 based on Foata normal form. 4/1669 useless extension candidates. Maximal degree in co-relation 6790. Up to 1429 conditions per place. [2024-06-21 15:50:56,714 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 81 selfloop transitions, 29 changer transitions 0/118 dead transitions. [2024-06-21 15:50:56,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 982 flow [2024-06-21 15:50:56,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:50:56,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:50:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 15:50:56,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 15:50:56,716 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 546 flow. Second operand 7 states and 189 transitions. [2024-06-21 15:50:56,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 982 flow [2024-06-21 15:50:56,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 953 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 15:50:56,730 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 667 flow [2024-06-21 15:50:56,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-06-21 15:50:56,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-21 15:50:56,731 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 667 flow [2024-06-21 15:50:56,731 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) [2024-06-21 15:50:56,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:56,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:56,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:50:56,732 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)] === [2024-06-21 15:50:56,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1808409687, now seen corresponding path program 2 times [2024-06-21 15:50:56,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:56,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287786018] [2024-06-21 15:50:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:56,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:56,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:56,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287786018] [2024-06-21 15:50:56,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287786018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:56,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:56,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:50:56,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082676723] [2024-06-21 15:50:56,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:56,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:50:56,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:56,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:50:56,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:50:56,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:56,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 667 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) [2024-06-21 15:50:56,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:56,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:56,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:57,075 INFO L124 PetriNetUnfolderBase]: 1023/1697 cut-off events. [2024-06-21 15:50:57,076 INFO L125 PetriNetUnfolderBase]: For 11529/11529 co-relation queries the response was YES. [2024-06-21 15:50:57,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7657 conditions, 1697 events. 1023/1697 cut-off events. For 11529/11529 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8692 event pairs, 311 based on Foata normal form. 2/1694 useless extension candidates. Maximal degree in co-relation 7621. Up to 1390 conditions per place. [2024-06-21 15:50:57,091 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 81 selfloop transitions, 32 changer transitions 0/121 dead transitions. [2024-06-21 15:50:57,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1113 flow [2024-06-21 15:50:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:50:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:50:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 15:50:57,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-21 15:50:57,093 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 667 flow. Second operand 6 states and 157 transitions. [2024-06-21 15:50:57,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1113 flow [2024-06-21 15:50:57,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 121 transitions, 1037 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 15:50:57,112 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 818 flow [2024-06-21 15:50:57,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=818, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-21 15:50:57,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-21 15:50:57,113 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 818 flow [2024-06-21 15:50:57,113 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) [2024-06-21 15:50:57,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:57,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:57,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:50:57,114 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)] === [2024-06-21 15:50:57,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:57,114 INFO L85 PathProgramCache]: Analyzing trace with hash 200005899, now seen corresponding path program 3 times [2024-06-21 15:50:57,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:57,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752800477] [2024-06-21 15:50:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:57,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:57,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752800477] [2024-06-21 15:50:57,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752800477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:57,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:57,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:50:57,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412575229] [2024-06-21 15:50:57,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:57,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:50:57,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:57,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:50:57,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:50:57,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:57,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 818 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) [2024-06-21 15:50:57,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:57,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:57,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:57,424 INFO L124 PetriNetUnfolderBase]: 1018/1667 cut-off events. [2024-06-21 15:50:57,425 INFO L125 PetriNetUnfolderBase]: For 14135/14135 co-relation queries the response was YES. [2024-06-21 15:50:57,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8135 conditions, 1667 events. 1018/1667 cut-off events. For 14135/14135 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8488 event pairs, 337 based on Foata normal form. 2/1655 useless extension candidates. Maximal degree in co-relation 8095. Up to 1387 conditions per place. [2024-06-21 15:50:57,440 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 36 changer transitions 0/120 dead transitions. [2024-06-21 15:50:57,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1178 flow [2024-06-21 15:50:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:50:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:50:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:50:57,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:50:57,442 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 818 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:50:57,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1178 flow [2024-06-21 15:50:57,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 120 transitions, 1142 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-21 15:50:57,463 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 900 flow [2024-06-21 15:50:57,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=900, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-21 15:50:57,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-21 15:50:57,464 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 900 flow [2024-06-21 15:50:57,465 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) [2024-06-21 15:50:57,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:57,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:57,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:50:57,465 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:57,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:57,466 INFO L85 PathProgramCache]: Analyzing trace with hash 641726190, now seen corresponding path program 1 times [2024-06-21 15:50:57,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:57,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908841954] [2024-06-21 15:50:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:57,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:57,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:57,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908841954] [2024-06-21 15:50:57,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908841954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:57,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:57,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:50:57,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14679593] [2024-06-21 15:50:57,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:57,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:50:57,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:50:57,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:50:57,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:50:57,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 900 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) [2024-06-21 15:50:57,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:57,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:50:57,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:57,788 INFO L124 PetriNetUnfolderBase]: 923/1561 cut-off events. [2024-06-21 15:50:57,789 INFO L125 PetriNetUnfolderBase]: For 15407/15412 co-relation queries the response was YES. [2024-06-21 15:50:57,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7910 conditions, 1561 events. 923/1561 cut-off events. For 15407/15412 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8111 event pairs, 312 based on Foata normal form. 8/1562 useless extension candidates. Maximal degree in co-relation 7868. Up to 1345 conditions per place. [2024-06-21 15:50:57,803 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 75 selfloop transitions, 18 changer transitions 0/108 dead transitions. [2024-06-21 15:50:57,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 108 transitions, 1121 flow [2024-06-21 15:50:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:50:57,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:50:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 15:50:57,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-21 15:50:57,805 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 900 flow. Second operand 4 states and 105 transitions. [2024-06-21 15:50:57,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 108 transitions, 1121 flow [2024-06-21 15:50:57,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 1055 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 15:50:57,824 INFO L231 Difference]: Finished difference. Result has 92 places, 99 transitions, 880 flow [2024-06-21 15:50:57,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=880, PETRI_PLACES=92, PETRI_TRANSITIONS=99} [2024-06-21 15:50:57,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-21 15:50:57,826 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 99 transitions, 880 flow [2024-06-21 15:50:57,826 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) [2024-06-21 15:50:57,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:57,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:57,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:50:57,827 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)] === [2024-06-21 15:50:57,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:57,827 INFO L85 PathProgramCache]: Analyzing trace with hash -96637342, now seen corresponding path program 1 times [2024-06-21 15:50:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:57,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245455484] [2024-06-21 15:50:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:57,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:57,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245455484] [2024-06-21 15:50:57,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245455484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:57,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:57,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:50:57,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144287005] [2024-06-21 15:50:57,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:57,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:50:57,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:57,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:50:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:50:58,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:58,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 99 transitions, 880 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) [2024-06-21 15:50:58,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:58,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:58,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:58,240 INFO L124 PetriNetUnfolderBase]: 982/1632 cut-off events. [2024-06-21 15:50:58,240 INFO L125 PetriNetUnfolderBase]: For 16651/16651 co-relation queries the response was YES. [2024-06-21 15:50:58,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8164 conditions, 1632 events. 982/1632 cut-off events. For 16651/16651 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8263 event pairs, 302 based on Foata normal form. 4/1632 useless extension candidates. Maximal degree in co-relation 8120. Up to 1396 conditions per place. [2024-06-21 15:50:58,256 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 87 selfloop transitions, 35 changer transitions 0/130 dead transitions. [2024-06-21 15:50:58,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 130 transitions, 1218 flow [2024-06-21 15:50:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:50:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:50:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 15:50:58,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-21 15:50:58,258 INFO L175 Difference]: Start difference. First operand has 92 places, 99 transitions, 880 flow. Second operand 7 states and 186 transitions. [2024-06-21 15:50:58,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 130 transitions, 1218 flow [2024-06-21 15:50:58,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1166 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 15:50:58,284 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 911 flow [2024-06-21 15:50:58,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2024-06-21 15:50:58,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-21 15:50:58,285 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 911 flow [2024-06-21 15:50:58,285 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) [2024-06-21 15:50:58,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:58,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:58,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:50:58,286 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)] === [2024-06-21 15:50:58,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:58,287 INFO L85 PathProgramCache]: Analyzing trace with hash -226124126, now seen corresponding path program 2 times [2024-06-21 15:50:58,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:58,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656051074] [2024-06-21 15:50:58,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:58,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:58,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:58,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656051074] [2024-06-21 15:50:58,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656051074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:58,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:58,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:50:58,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648375478] [2024-06-21 15:50:58,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:58,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:50:58,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:58,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:50:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:50:58,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:58,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 911 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) [2024-06-21 15:50:58,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:58,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:58,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:58,704 INFO L124 PetriNetUnfolderBase]: 993/1655 cut-off events. [2024-06-21 15:50:58,705 INFO L125 PetriNetUnfolderBase]: For 18270/18270 co-relation queries the response was YES. [2024-06-21 15:50:58,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8453 conditions, 1655 events. 993/1655 cut-off events. For 18270/18270 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8453 event pairs, 306 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 8409. Up to 1347 conditions per place. [2024-06-21 15:50:58,720 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 85 selfloop transitions, 37 changer transitions 0/130 dead transitions. [2024-06-21 15:50:58,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1317 flow [2024-06-21 15:50:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:50:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:50:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:50:58,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:50:58,721 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 911 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:50:58,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1317 flow [2024-06-21 15:50:58,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 130 transitions, 1247 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:50:58,748 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 957 flow [2024-06-21 15:50:58,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=957, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-06-21 15:50:58,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-21 15:50:58,749 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 957 flow [2024-06-21 15:50:58,749 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) [2024-06-21 15:50:58,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:58,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:58,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:50:58,750 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)] === [2024-06-21 15:50:58,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:58,751 INFO L85 PathProgramCache]: Analyzing trace with hash -225916736, now seen corresponding path program 3 times [2024-06-21 15:50:58,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:58,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769587471] [2024-06-21 15:50:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:58,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:58,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:58,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769587471] [2024-06-21 15:50:58,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769587471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:58,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:58,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:50:58,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654606720] [2024-06-21 15:50:58,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:58,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:50:58,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:58,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:50:58,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:50:58,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:58,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 957 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) [2024-06-21 15:50:58,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:58,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:58,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:59,106 INFO L124 PetriNetUnfolderBase]: 1020/1704 cut-off events. [2024-06-21 15:50:59,106 INFO L125 PetriNetUnfolderBase]: For 20837/20837 co-relation queries the response was YES. [2024-06-21 15:50:59,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8882 conditions, 1704 events. 1020/1704 cut-off events. For 20837/20837 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8754 event pairs, 306 based on Foata normal form. 2/1701 useless extension candidates. Maximal degree in co-relation 8837. Up to 1376 conditions per place. [2024-06-21 15:50:59,123 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 83 selfloop transitions, 43 changer transitions 0/134 dead transitions. [2024-06-21 15:50:59,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 1477 flow [2024-06-21 15:50:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:50:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:50:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:50:59,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 15:50:59,124 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 957 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:50:59,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 1477 flow [2024-06-21 15:50:59,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1375 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 15:50:59,155 INFO L231 Difference]: Finished difference. Result has 98 places, 108 transitions, 1029 flow [2024-06-21 15:50:59,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1029, PETRI_PLACES=98, PETRI_TRANSITIONS=108} [2024-06-21 15:50:59,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-21 15:50:59,156 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 108 transitions, 1029 flow [2024-06-21 15:50:59,156 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) [2024-06-21 15:50:59,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:59,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:59,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:50:59,157 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)] === [2024-06-21 15:50:59,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash -225908800, now seen corresponding path program 1 times [2024-06-21 15:50:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:59,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369839406] [2024-06-21 15:50:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:59,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:59,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:59,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369839406] [2024-06-21 15:50:59,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369839406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:59,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:59,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:50:59,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112144241] [2024-06-21 15:50:59,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:59,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:50:59,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:59,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:50:59,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:50:59,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:59,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 108 transitions, 1029 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) [2024-06-21 15:50:59,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:59,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:59,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:59,532 INFO L124 PetriNetUnfolderBase]: 1037/1729 cut-off events. [2024-06-21 15:50:59,533 INFO L125 PetriNetUnfolderBase]: For 23067/23067 co-relation queries the response was YES. [2024-06-21 15:50:59,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9087 conditions, 1729 events. 1037/1729 cut-off events. For 23067/23067 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8890 event pairs, 302 based on Foata normal form. 4/1728 useless extension candidates. Maximal degree in co-relation 9041. Up to 1476 conditions per place. [2024-06-21 15:50:59,550 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 101 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-06-21 15:50:59,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 133 transitions, 1357 flow [2024-06-21 15:50:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:50:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:50:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:50:59,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:50:59,552 INFO L175 Difference]: Start difference. First operand has 98 places, 108 transitions, 1029 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:50:59,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 133 transitions, 1357 flow [2024-06-21 15:50:59,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 133 transitions, 1293 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 15:50:59,584 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 1044 flow [2024-06-21 15:50:59,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1044, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-21 15:50:59,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-21 15:50:59,585 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 1044 flow [2024-06-21 15:50:59,585 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) [2024-06-21 15:50:59,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:59,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:59,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:50:59,586 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)] === [2024-06-21 15:50:59,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:59,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2133042500, now seen corresponding path program 4 times [2024-06-21 15:50:59,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:59,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012445035] [2024-06-21 15:50:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:59,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:59,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:59,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012445035] [2024-06-21 15:50:59,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012445035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:59,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:59,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:50:59,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740884137] [2024-06-21 15:50:59,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:59,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:50:59,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:59,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:50:59,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:50:59,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:50:59,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 1044 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) [2024-06-21 15:50:59,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:59,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:50:59,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:59,933 INFO L124 PetriNetUnfolderBase]: 1032/1713 cut-off events. [2024-06-21 15:50:59,934 INFO L125 PetriNetUnfolderBase]: For 25209/25215 co-relation queries the response was YES. [2024-06-21 15:50:59,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9177 conditions, 1713 events. 1032/1713 cut-off events. For 25209/25215 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8881 event pairs, 334 based on Foata normal form. 6/1708 useless extension candidates. Maximal degree in co-relation 9130. Up to 1398 conditions per place. [2024-06-21 15:50:59,949 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 81 selfloop transitions, 43 changer transitions 0/132 dead transitions. [2024-06-21 15:50:59,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 1427 flow [2024-06-21 15:50:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:50:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:50:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:50:59,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:50:59,951 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 1044 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:50:59,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 1427 flow [2024-06-21 15:50:59,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 132 transitions, 1362 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 15:50:59,980 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 1086 flow [2024-06-21 15:50:59,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1086, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2024-06-21 15:50:59,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-21 15:50:59,981 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 1086 flow [2024-06-21 15:50:59,981 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) [2024-06-21 15:50:59,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:59,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:59,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:50:59,982 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)] === [2024-06-21 15:50:59,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1508049312, now seen corresponding path program 5 times [2024-06-21 15:50:59,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:59,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933271763] [2024-06-21 15:50:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:59,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:00,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:00,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933271763] [2024-06-21 15:51:00,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933271763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:00,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:00,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:00,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659996746] [2024-06-21 15:51:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:00,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:00,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:00,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:00,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 1086 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) [2024-06-21 15:51:00,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:00,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:00,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:00,400 INFO L124 PetriNetUnfolderBase]: 1027/1691 cut-off events. [2024-06-21 15:51:00,400 INFO L125 PetriNetUnfolderBase]: For 26983/26983 co-relation queries the response was YES. [2024-06-21 15:51:00,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9240 conditions, 1691 events. 1027/1691 cut-off events. For 26983/26983 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8637 event pairs, 338 based on Foata normal form. 2/1679 useless extension candidates. Maximal degree in co-relation 9192. Up to 1393 conditions per place. [2024-06-21 15:51:00,425 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 80 selfloop transitions, 46 changer transitions 0/134 dead transitions. [2024-06-21 15:51:00,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 134 transitions, 1396 flow [2024-06-21 15:51:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:51:00,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:51:00,427 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 1086 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:51:00,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 134 transitions, 1396 flow [2024-06-21 15:51:00,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 134 transitions, 1318 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 15:51:00,464 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 1108 flow [2024-06-21 15:51:00,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1108, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-06-21 15:51:00,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-21 15:51:00,464 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 1108 flow [2024-06-21 15:51:00,465 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) [2024-06-21 15:51:00,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:00,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:00,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:51:00,466 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)] === [2024-06-21 15:51:00,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1581300548, now seen corresponding path program 2 times [2024-06-21 15:51:00,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:00,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251346462] [2024-06-21 15:51:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:00,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:00,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:00,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251346462] [2024-06-21 15:51:00,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251346462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:00,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:00,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:00,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101682414] [2024-06-21 15:51:00,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:00,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:00,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:00,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:00,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:00,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:00,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 1108 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) [2024-06-21 15:51:00,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:00,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:00,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:00,864 INFO L124 PetriNetUnfolderBase]: 1044/1748 cut-off events. [2024-06-21 15:51:00,865 INFO L125 PetriNetUnfolderBase]: For 30029/30035 co-relation queries the response was YES. [2024-06-21 15:51:00,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 1748 events. 1044/1748 cut-off events. For 30029/30035 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9108 event pairs, 320 based on Foata normal form. 8/1749 useless extension candidates. Maximal degree in co-relation 9461. Up to 1489 conditions per place. [2024-06-21 15:51:00,883 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 102 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-21 15:51:00,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 1432 flow [2024-06-21 15:51:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 15:51:00,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-21 15:51:00,885 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 1108 flow. Second operand 6 states and 149 transitions. [2024-06-21 15:51:00,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 1432 flow [2024-06-21 15:51:00,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 133 transitions, 1330 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:00,924 INFO L231 Difference]: Finished difference. Result has 109 places, 113 transitions, 1087 flow [2024-06-21 15:51:00,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1087, PETRI_PLACES=109, PETRI_TRANSITIONS=113} [2024-06-21 15:51:00,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-21 15:51:00,924 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 113 transitions, 1087 flow [2024-06-21 15:51:00,925 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) [2024-06-21 15:51:00,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:00,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:00,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:51:00,925 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)] === [2024-06-21 15:51:00,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:00,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2123511364, now seen corresponding path program 3 times [2024-06-21 15:51:00,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:00,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701365255] [2024-06-21 15:51:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:00,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:01,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:01,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701365255] [2024-06-21 15:51:01,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701365255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:01,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:01,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:01,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573924923] [2024-06-21 15:51:01,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:01,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:01,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:01,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:01,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:01,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 113 transitions, 1087 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) [2024-06-21 15:51:01,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:01,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:01,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:01,305 INFO L124 PetriNetUnfolderBase]: 1036/1736 cut-off events. [2024-06-21 15:51:01,306 INFO L125 PetriNetUnfolderBase]: For 31485/31491 co-relation queries the response was YES. [2024-06-21 15:51:01,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 1736 events. 1036/1736 cut-off events. For 31485/31491 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9061 event pairs, 289 based on Foata normal form. 8/1737 useless extension candidates. Maximal degree in co-relation 9460. Up to 1418 conditions per place. [2024-06-21 15:51:01,321 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 100 selfloop transitions, 28 changer transitions 0/136 dead transitions. [2024-06-21 15:51:01,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 136 transitions, 1423 flow [2024-06-21 15:51:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:51:01,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:51:01,324 INFO L175 Difference]: Start difference. First operand has 109 places, 113 transitions, 1087 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:51:01,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 136 transitions, 1423 flow [2024-06-21 15:51:01,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 136 transitions, 1360 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:01,362 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 1119 flow [2024-06-21 15:51:01,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2024-06-21 15:51:01,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-21 15:51:01,363 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 1119 flow [2024-06-21 15:51:01,364 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) [2024-06-21 15:51:01,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:01,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:01,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:51:01,364 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)] === [2024-06-21 15:51:01,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:01,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1153123088, now seen corresponding path program 1 times [2024-06-21 15:51:01,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:01,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542834748] [2024-06-21 15:51:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:01,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:01,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:01,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542834748] [2024-06-21 15:51:01,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542834748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:01,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:01,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:51:01,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021106900] [2024-06-21 15:51:01,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:01,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:51:01,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:51:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:51:01,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:01,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 1119 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:01,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:01,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:01,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:01,678 INFO L124 PetriNetUnfolderBase]: 1041/1730 cut-off events. [2024-06-21 15:51:01,678 INFO L125 PetriNetUnfolderBase]: For 32573/32573 co-relation queries the response was YES. [2024-06-21 15:51:01,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9741 conditions, 1730 events. 1041/1730 cut-off events. For 32573/32573 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8895 event pairs, 301 based on Foata normal form. 1/1727 useless extension candidates. Maximal degree in co-relation 9689. Up to 1539 conditions per place. [2024-06-21 15:51:01,695 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 110 selfloop transitions, 20 changer transitions 0/138 dead transitions. [2024-06-21 15:51:01,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 138 transitions, 1599 flow [2024-06-21 15:51:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:51:01,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:51:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 15:51:01,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:51:01,697 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 1119 flow. Second operand 5 states and 125 transitions. [2024-06-21 15:51:01,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 138 transitions, 1599 flow [2024-06-21 15:51:01,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 138 transitions, 1522 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:01,744 INFO L231 Difference]: Finished difference. Result has 113 places, 124 transitions, 1208 flow [2024-06-21 15:51:01,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1208, PETRI_PLACES=113, PETRI_TRANSITIONS=124} [2024-06-21 15:51:01,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-21 15:51:01,745 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 124 transitions, 1208 flow [2024-06-21 15:51:01,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:01,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:01,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:01,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:51:01,746 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)] === [2024-06-21 15:51:01,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash -867863842, now seen corresponding path program 2 times [2024-06-21 15:51:01,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:01,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825565424] [2024-06-21 15:51:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:01,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:01,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:01,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825565424] [2024-06-21 15:51:01,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825565424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:01,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:01,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:51:01,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313098317] [2024-06-21 15:51:01,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:01,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:51:01,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:01,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:51:01,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:51:01,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:01,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 124 transitions, 1208 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:01,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:01,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:01,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:02,085 INFO L124 PetriNetUnfolderBase]: 1046/1746 cut-off events. [2024-06-21 15:51:02,085 INFO L125 PetriNetUnfolderBase]: For 35145/35145 co-relation queries the response was YES. [2024-06-21 15:51:02,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10066 conditions, 1746 events. 1046/1746 cut-off events. For 35145/35145 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9019 event pairs, 299 based on Foata normal form. 1/1745 useless extension candidates. Maximal degree in co-relation 10012. Up to 1555 conditions per place. [2024-06-21 15:51:02,101 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 117 selfloop transitions, 18 changer transitions 0/143 dead transitions. [2024-06-21 15:51:02,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 143 transitions, 1603 flow [2024-06-21 15:51:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:51:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:51:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 15:51:02,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-21 15:51:02,103 INFO L175 Difference]: Start difference. First operand has 113 places, 124 transitions, 1208 flow. Second operand 5 states and 127 transitions. [2024-06-21 15:51:02,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 143 transitions, 1603 flow [2024-06-21 15:51:02,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 143 transitions, 1537 flow, removed 33 selfloop flow, removed 0 redundant places. [2024-06-21 15:51:02,165 INFO L231 Difference]: Finished difference. Result has 119 places, 127 transitions, 1241 flow [2024-06-21 15:51:02,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1241, PETRI_PLACES=119, PETRI_TRANSITIONS=127} [2024-06-21 15:51:02,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-21 15:51:02,166 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 127 transitions, 1241 flow [2024-06-21 15:51:02,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:02,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:02,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:02,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:51:02,167 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)] === [2024-06-21 15:51:02,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:02,168 INFO L85 PathProgramCache]: Analyzing trace with hash 846380170, now seen corresponding path program 1 times [2024-06-21 15:51:02,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:02,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732804058] [2024-06-21 15:51:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:02,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:02,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:02,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732804058] [2024-06-21 15:51:02,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732804058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:02,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:02,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:02,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309458626] [2024-06-21 15:51:02,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:02,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:02,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:02,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:02,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:02,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:02,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 127 transitions, 1241 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) [2024-06-21 15:51:02,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:02,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:02,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:02,769 INFO L124 PetriNetUnfolderBase]: 1450/2394 cut-off events. [2024-06-21 15:51:02,770 INFO L125 PetriNetUnfolderBase]: For 62810/62810 co-relation queries the response was YES. [2024-06-21 15:51:02,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14367 conditions, 2394 events. 1450/2394 cut-off events. For 62810/62810 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13079 event pairs, 330 based on Foata normal form. 14/2404 useless extension candidates. Maximal degree in co-relation 14309. Up to 1444 conditions per place. [2024-06-21 15:51:02,790 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 133 selfloop transitions, 40 changer transitions 0/181 dead transitions. [2024-06-21 15:51:02,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 181 transitions, 1931 flow [2024-06-21 15:51:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 15:51:02,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-21 15:51:02,792 INFO L175 Difference]: Start difference. First operand has 119 places, 127 transitions, 1241 flow. Second operand 8 states and 220 transitions. [2024-06-21 15:51:02,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 181 transitions, 1931 flow [2024-06-21 15:51:02,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 1899 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 15:51:02,875 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1413 flow [2024-06-21 15:51:02,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1413, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2024-06-21 15:51:02,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-21 15:51:02,876 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1413 flow [2024-06-21 15:51:02,876 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) [2024-06-21 15:51:02,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:02,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:02,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:51:02,877 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)] === [2024-06-21 15:51:02,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1409380650, now seen corresponding path program 2 times [2024-06-21 15:51:02,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:02,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499119960] [2024-06-21 15:51:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:02,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:02,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:02,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499119960] [2024-06-21 15:51:02,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499119960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:02,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:02,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:02,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053307348] [2024-06-21 15:51:02,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:02,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:02,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:02,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:02,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:03,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:03,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1413 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) [2024-06-21 15:51:03,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:03,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:03,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:03,398 INFO L124 PetriNetUnfolderBase]: 1419/2349 cut-off events. [2024-06-21 15:51:03,399 INFO L125 PetriNetUnfolderBase]: For 64230/64230 co-relation queries the response was YES. [2024-06-21 15:51:03,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14497 conditions, 2349 events. 1419/2349 cut-off events. For 64230/64230 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12780 event pairs, 419 based on Foata normal form. 14/2359 useless extension candidates. Maximal degree in co-relation 14437. Up to 2032 conditions per place. [2024-06-21 15:51:03,422 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 129 selfloop transitions, 38 changer transitions 0/175 dead transitions. [2024-06-21 15:51:03,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 175 transitions, 1917 flow [2024-06-21 15:51:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 15:51:03,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 15:51:03,424 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1413 flow. Second operand 8 states and 212 transitions. [2024-06-21 15:51:03,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 175 transitions, 1917 flow [2024-06-21 15:51:03,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 175 transitions, 1829 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:03,518 INFO L231 Difference]: Finished difference. Result has 129 places, 137 transitions, 1473 flow [2024-06-21 15:51:03,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1473, PETRI_PLACES=129, PETRI_TRANSITIONS=137} [2024-06-21 15:51:03,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-21 15:51:03,519 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 137 transitions, 1473 flow [2024-06-21 15:51:03,519 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) [2024-06-21 15:51:03,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:03,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:03,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:51:03,519 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)] === [2024-06-21 15:51:03,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1580083080, now seen corresponding path program 3 times [2024-06-21 15:51:03,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:03,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803107098] [2024-06-21 15:51:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:03,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:03,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:03,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803107098] [2024-06-21 15:51:03,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803107098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:03,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:03,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:03,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342926429] [2024-06-21 15:51:03,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:03,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:03,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:03,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:03,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 137 transitions, 1473 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) [2024-06-21 15:51:03,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:03,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:03,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:04,017 INFO L124 PetriNetUnfolderBase]: 1436/2378 cut-off events. [2024-06-21 15:51:04,017 INFO L125 PetriNetUnfolderBase]: For 66644/66644 co-relation queries the response was YES. [2024-06-21 15:51:04,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14822 conditions, 2378 events. 1436/2378 cut-off events. For 66644/66644 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13017 event pairs, 423 based on Foata normal form. 4/2377 useless extension candidates. Maximal degree in co-relation 14760. Up to 2026 conditions per place. [2024-06-21 15:51:04,041 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 112 selfloop transitions, 46 changer transitions 0/166 dead transitions. [2024-06-21 15:51:04,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 166 transitions, 1899 flow [2024-06-21 15:51:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:51:04,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 15:51:04,045 INFO L175 Difference]: Start difference. First operand has 129 places, 137 transitions, 1473 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:51:04,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 166 transitions, 1899 flow [2024-06-21 15:51:04,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 166 transitions, 1793 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:04,130 INFO L231 Difference]: Finished difference. Result has 130 places, 139 transitions, 1512 flow [2024-06-21 15:51:04,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1512, PETRI_PLACES=130, PETRI_TRANSITIONS=139} [2024-06-21 15:51:04,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 15:51:04,131 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 139 transitions, 1512 flow [2024-06-21 15:51:04,131 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) [2024-06-21 15:51:04,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:04,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:04,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:51:04,131 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:51:04,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1067821974, now seen corresponding path program 4 times [2024-06-21 15:51:04,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:04,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948660522] [2024-06-21 15:51:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:04,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:04,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:04,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948660522] [2024-06-21 15:51:04,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948660522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:04,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:04,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:04,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536968286] [2024-06-21 15:51:04,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:04,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:04,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:04,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 139 transitions, 1512 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) [2024-06-21 15:51:04,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:04,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:04,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:04,623 INFO L124 PetriNetUnfolderBase]: 1428/2339 cut-off events. [2024-06-21 15:51:04,623 INFO L125 PetriNetUnfolderBase]: For 69737/69737 co-relation queries the response was YES. [2024-06-21 15:51:04,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14631 conditions, 2339 events. 1428/2339 cut-off events. For 69737/69737 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12751 event pairs, 459 based on Foata normal form. 4/2327 useless extension candidates. Maximal degree in co-relation 14568. Up to 2014 conditions per place. [2024-06-21 15:51:04,644 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 48 changer transitions 0/165 dead transitions. [2024-06-21 15:51:04,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 165 transitions, 1932 flow [2024-06-21 15:51:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:51:04,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:51:04,646 INFO L175 Difference]: Start difference. First operand has 130 places, 139 transitions, 1512 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:51:04,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 165 transitions, 1932 flow [2024-06-21 15:51:04,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 165 transitions, 1803 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:04,753 INFO L231 Difference]: Finished difference. Result has 132 places, 141 transitions, 1536 flow [2024-06-21 15:51:04,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1536, PETRI_PLACES=132, PETRI_TRANSITIONS=141} [2024-06-21 15:51:04,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 15:51:04,757 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 141 transitions, 1536 flow [2024-06-21 15:51:04,757 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) [2024-06-21 15:51:04,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:04,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:04,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:51:04,757 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:51:04,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:04,758 INFO L85 PathProgramCache]: Analyzing trace with hash 877155941, now seen corresponding path program 1 times [2024-06-21 15:51:04,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:04,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401963471] [2024-06-21 15:51:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:04,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:04,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:04,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401963471] [2024-06-21 15:51:04,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401963471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:04,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:04,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:51:04,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470955984] [2024-06-21 15:51:04,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:04,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:51:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:51:04,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:51:04,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:04,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 141 transitions, 1536 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:04,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:04,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:04,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:05,143 INFO L124 PetriNetUnfolderBase]: 1433/2376 cut-off events. [2024-06-21 15:51:05,143 INFO L125 PetriNetUnfolderBase]: For 72562/72568 co-relation queries the response was YES. [2024-06-21 15:51:05,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14823 conditions, 2376 events. 1433/2376 cut-off events. For 72562/72568 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13016 event pairs, 419 based on Foata normal form. 5/2378 useless extension candidates. Maximal degree in co-relation 14759. Up to 2162 conditions per place. [2024-06-21 15:51:05,167 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 125 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2024-06-21 15:51:05,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 157 transitions, 1961 flow [2024-06-21 15:51:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:51:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:51:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-21 15:51:05,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-21 15:51:05,168 INFO L175 Difference]: Start difference. First operand has 132 places, 141 transitions, 1536 flow. Second operand 5 states and 124 transitions. [2024-06-21 15:51:05,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 157 transitions, 1961 flow [2024-06-21 15:51:05,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 157 transitions, 1826 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:05,309 INFO L231 Difference]: Finished difference. Result has 132 places, 144 transitions, 1494 flow [2024-06-21 15:51:05,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1494, PETRI_PLACES=132, PETRI_TRANSITIONS=144} [2024-06-21 15:51:05,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 15:51:05,310 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 144 transitions, 1494 flow [2024-06-21 15:51:05,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:05,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:05,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:05,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:51:05,311 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)] === [2024-06-21 15:51:05,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:05,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1408326003, now seen corresponding path program 2 times [2024-06-21 15:51:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058193525] [2024-06-21 15:51:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:05,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:05,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:05,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058193525] [2024-06-21 15:51:05,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058193525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:05,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:05,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:05,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650193860] [2024-06-21 15:51:05,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:05,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:05,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:05,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:05,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:05,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:05,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 144 transitions, 1494 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) [2024-06-21 15:51:05,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:05,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:05,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:05,722 INFO L124 PetriNetUnfolderBase]: 1430/2368 cut-off events. [2024-06-21 15:51:05,723 INFO L125 PetriNetUnfolderBase]: For 74855/74855 co-relation queries the response was YES. [2024-06-21 15:51:05,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14650 conditions, 2368 events. 1430/2368 cut-off events. For 74855/74855 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12967 event pairs, 419 based on Foata normal form. 1/2365 useless extension candidates. Maximal degree in co-relation 14585. Up to 2159 conditions per place. [2024-06-21 15:51:05,746 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 124 selfloop transitions, 26 changer transitions 0/158 dead transitions. [2024-06-21 15:51:05,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 158 transitions, 1886 flow [2024-06-21 15:51:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 15:51:05,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-21 15:51:05,748 INFO L175 Difference]: Start difference. First operand has 132 places, 144 transitions, 1494 flow. Second operand 6 states and 143 transitions. [2024-06-21 15:51:05,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 158 transitions, 1886 flow [2024-06-21 15:51:05,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 158 transitions, 1806 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 15:51:05,872 INFO L231 Difference]: Finished difference. Result has 135 places, 144 transitions, 1472 flow [2024-06-21 15:51:05,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1472, PETRI_PLACES=135, PETRI_TRANSITIONS=144} [2024-06-21 15:51:05,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-21 15:51:05,873 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 144 transitions, 1472 flow [2024-06-21 15:51:05,873 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) [2024-06-21 15:51:05,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:05,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:05,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:51:05,874 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)] === [2024-06-21 15:51:05,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:05,874 INFO L85 PathProgramCache]: Analyzing trace with hash 791184635, now seen corresponding path program 1 times [2024-06-21 15:51:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310008344] [2024-06-21 15:51:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:05,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:05,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:05,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310008344] [2024-06-21 15:51:05,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310008344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:05,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:05,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:05,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757072080] [2024-06-21 15:51:05,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:05,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:05,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:05,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:05,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 144 transitions, 1472 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) [2024-06-21 15:51:05,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:05,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:05,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:06,257 INFO L124 PetriNetUnfolderBase]: 1458/2419 cut-off events. [2024-06-21 15:51:06,257 INFO L125 PetriNetUnfolderBase]: For 81776/81776 co-relation queries the response was YES. [2024-06-21 15:51:06,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15138 conditions, 2419 events. 1458/2419 cut-off events. For 81776/81776 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13394 event pairs, 435 based on Foata normal form. 2/2413 useless extension candidates. Maximal degree in co-relation 15073. Up to 2035 conditions per place. [2024-06-21 15:51:06,274 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 129 selfloop transitions, 43 changer transitions 0/180 dead transitions. [2024-06-21 15:51:06,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 180 transitions, 2282 flow [2024-06-21 15:51:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 15:51:06,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 15:51:06,275 INFO L175 Difference]: Start difference. First operand has 135 places, 144 transitions, 1472 flow. Second operand 6 states and 152 transitions. [2024-06-21 15:51:06,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 180 transitions, 2282 flow [2024-06-21 15:51:06,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 180 transitions, 2194 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:06,357 INFO L231 Difference]: Finished difference. Result has 137 places, 160 transitions, 1729 flow [2024-06-21 15:51:06,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1729, PETRI_PLACES=137, PETRI_TRANSITIONS=160} [2024-06-21 15:51:06,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-21 15:51:06,357 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 160 transitions, 1729 flow [2024-06-21 15:51:06,358 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) [2024-06-21 15:51:06,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:06,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:06,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:51:06,358 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)] === [2024-06-21 15:51:06,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:06,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1477742069, now seen corresponding path program 3 times [2024-06-21 15:51:06,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:06,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013112542] [2024-06-21 15:51:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:06,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:06,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:06,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013112542] [2024-06-21 15:51:06,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013112542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:06,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:06,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:51:06,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130887808] [2024-06-21 15:51:06,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:06,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:51:06,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:06,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:51:06,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:51:06,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:06,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 160 transitions, 1729 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:06,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:06,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:06,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:06,783 INFO L124 PetriNetUnfolderBase]: 1455/2409 cut-off events. [2024-06-21 15:51:06,783 INFO L125 PetriNetUnfolderBase]: For 85932/85932 co-relation queries the response was YES. [2024-06-21 15:51:06,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15807 conditions, 2409 events. 1455/2409 cut-off events. For 85932/85932 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13202 event pairs, 411 based on Foata normal form. 1/2408 useless extension candidates. Maximal degree in co-relation 15740. Up to 2204 conditions per place. [2024-06-21 15:51:06,802 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 149 selfloop transitions, 18 changer transitions 0/175 dead transitions. [2024-06-21 15:51:06,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 175 transitions, 2101 flow [2024-06-21 15:51:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:51:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:51:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 15:51:06,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-21 15:51:06,803 INFO L175 Difference]: Start difference. First operand has 137 places, 160 transitions, 1729 flow. Second operand 5 states and 126 transitions. [2024-06-21 15:51:06,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 175 transitions, 2101 flow [2024-06-21 15:51:06,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 175 transitions, 2023 flow, removed 39 selfloop flow, removed 0 redundant places. [2024-06-21 15:51:06,912 INFO L231 Difference]: Finished difference. Result has 142 places, 160 transitions, 1697 flow [2024-06-21 15:51:06,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1697, PETRI_PLACES=142, PETRI_TRANSITIONS=160} [2024-06-21 15:51:06,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 15:51:06,913 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 160 transitions, 1697 flow [2024-06-21 15:51:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:06,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:06,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:06,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:51:06,914 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)] === [2024-06-21 15:51:06,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:06,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1462785995, now seen corresponding path program 2 times [2024-06-21 15:51:06,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:06,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721640647] [2024-06-21 15:51:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:06,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:07,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:07,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721640647] [2024-06-21 15:51:07,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721640647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:07,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:07,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:07,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675844304] [2024-06-21 15:51:07,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:07,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:07,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:07,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:07,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 160 transitions, 1697 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) [2024-06-21 15:51:07,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:07,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:07,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:07,361 INFO L124 PetriNetUnfolderBase]: 1526/2530 cut-off events. [2024-06-21 15:51:07,361 INFO L125 PetriNetUnfolderBase]: For 94766/94766 co-relation queries the response was YES. [2024-06-21 15:51:07,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16628 conditions, 2530 events. 1526/2530 cut-off events. For 94766/94766 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14143 event pairs, 431 based on Foata normal form. 3/2527 useless extension candidates. Maximal degree in co-relation 16558. Up to 2094 conditions per place. [2024-06-21 15:51:07,387 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 121 selfloop transitions, 70 changer transitions 0/199 dead transitions. [2024-06-21 15:51:07,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 199 transitions, 2558 flow [2024-06-21 15:51:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 15:51:07,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 15:51:07,389 INFO L175 Difference]: Start difference. First operand has 142 places, 160 transitions, 1697 flow. Second operand 7 states and 176 transitions. [2024-06-21 15:51:07,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 199 transitions, 2558 flow [2024-06-21 15:51:07,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 199 transitions, 2522 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:07,498 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 2137 flow [2024-06-21 15:51:07,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2137, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2024-06-21 15:51:07,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 15:51:07,499 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 2137 flow [2024-06-21 15:51:07,500 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) [2024-06-21 15:51:07,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:07,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:07,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:51:07,500 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)] === [2024-06-21 15:51:07,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:07,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1462548845, now seen corresponding path program 3 times [2024-06-21 15:51:07,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:07,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857167311] [2024-06-21 15:51:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:07,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:07,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:07,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857167311] [2024-06-21 15:51:07,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857167311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:07,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:07,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:07,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305458801] [2024-06-21 15:51:07,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:07,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:07,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:07,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:07,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 2137 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) [2024-06-21 15:51:07,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:07,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:07,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:07,950 INFO L124 PetriNetUnfolderBase]: 1519/2526 cut-off events. [2024-06-21 15:51:07,950 INFO L125 PetriNetUnfolderBase]: For 101352/101352 co-relation queries the response was YES. [2024-06-21 15:51:07,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17508 conditions, 2526 events. 1519/2526 cut-off events. For 101352/101352 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14187 event pairs, 432 based on Foata normal form. 3/2523 useless extension candidates. Maximal degree in co-relation 17435. Up to 2091 conditions per place. [2024-06-21 15:51:07,969 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 123 selfloop transitions, 74 changer transitions 0/205 dead transitions. [2024-06-21 15:51:07,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 205 transitions, 2843 flow [2024-06-21 15:51:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 15:51:07,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-21 15:51:07,978 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 2137 flow. Second operand 6 states and 158 transitions. [2024-06-21 15:51:07,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 205 transitions, 2843 flow [2024-06-21 15:51:08,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 205 transitions, 2668 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-21 15:51:08,124 INFO L231 Difference]: Finished difference. Result has 151 places, 186 transitions, 2281 flow [2024-06-21 15:51:08,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=151, PETRI_TRANSITIONS=186} [2024-06-21 15:51:08,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-21 15:51:08,124 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 186 transitions, 2281 flow [2024-06-21 15:51:08,124 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) [2024-06-21 15:51:08,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:08,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:08,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:51:08,125 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)] === [2024-06-21 15:51:08,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1462794923, now seen corresponding path program 1 times [2024-06-21 15:51:08,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:08,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229030842] [2024-06-21 15:51:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:08,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:08,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:08,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229030842] [2024-06-21 15:51:08,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229030842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:08,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:08,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:08,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621665826] [2024-06-21 15:51:08,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:08,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:08,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:08,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:08,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:51:08,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 186 transitions, 2281 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) [2024-06-21 15:51:08,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:08,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:51:08,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:08,551 INFO L124 PetriNetUnfolderBase]: 1485/2500 cut-off events. [2024-06-21 15:51:08,551 INFO L125 PetriNetUnfolderBase]: For 110686/110691 co-relation queries the response was YES. [2024-06-21 15:51:08,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17474 conditions, 2500 events. 1485/2500 cut-off events. For 110686/110691 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14216 event pairs, 427 based on Foata normal form. 17/2506 useless extension candidates. Maximal degree in co-relation 17399. Up to 2109 conditions per place. [2024-06-21 15:51:08,571 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 153 selfloop transitions, 22 changer transitions 0/201 dead transitions. [2024-06-21 15:51:08,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 201 transitions, 2699 flow [2024-06-21 15:51:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:51:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:51:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 15:51:08,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-21 15:51:08,574 INFO L175 Difference]: Start difference. First operand has 151 places, 186 transitions, 2281 flow. Second operand 5 states and 128 transitions. [2024-06-21 15:51:08,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 201 transitions, 2699 flow [2024-06-21 15:51:08,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 201 transitions, 2570 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-21 15:51:08,716 INFO L231 Difference]: Finished difference. Result has 154 places, 188 transitions, 2229 flow [2024-06-21 15:51:08,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2229, PETRI_PLACES=154, PETRI_TRANSITIONS=188} [2024-06-21 15:51:08,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-21 15:51:08,717 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 188 transitions, 2229 flow [2024-06-21 15:51:08,717 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) [2024-06-21 15:51:08,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:08,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:08,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:51:08,717 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)] === [2024-06-21 15:51:08,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:08,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1532118627, now seen corresponding path program 1 times [2024-06-21 15:51:08,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:08,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058232825] [2024-06-21 15:51:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:08,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:08,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058232825] [2024-06-21 15:51:08,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058232825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:08,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:08,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:08,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228878491] [2024-06-21 15:51:08,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:08,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:08,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:08,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:08,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:08,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 188 transitions, 2229 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) [2024-06-21 15:51:08,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:08,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:08,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:09,341 INFO L124 PetriNetUnfolderBase]: 1679/2816 cut-off events. [2024-06-21 15:51:09,342 INFO L125 PetriNetUnfolderBase]: For 135834/135834 co-relation queries the response was YES. [2024-06-21 15:51:09,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18898 conditions, 2816 events. 1679/2816 cut-off events. For 135834/135834 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16102 event pairs, 327 based on Foata normal form. 42/2854 useless extension candidates. Maximal degree in co-relation 18822. Up to 1655 conditions per place. [2024-06-21 15:51:09,363 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 181 selfloop transitions, 44 changer transitions 5/238 dead transitions. [2024-06-21 15:51:09,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 238 transitions, 3028 flow [2024-06-21 15:51:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-21 15:51:09,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6737804878048781 [2024-06-21 15:51:09,364 INFO L175 Difference]: Start difference. First operand has 154 places, 188 transitions, 2229 flow. Second operand 8 states and 221 transitions. [2024-06-21 15:51:09,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 238 transitions, 3028 flow [2024-06-21 15:51:09,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 238 transitions, 2973 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 15:51:09,493 INFO L231 Difference]: Finished difference. Result has 159 places, 188 transitions, 2281 flow [2024-06-21 15:51:09,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2281, PETRI_PLACES=159, PETRI_TRANSITIONS=188} [2024-06-21 15:51:09,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-21 15:51:09,494 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 188 transitions, 2281 flow [2024-06-21 15:51:09,494 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) [2024-06-21 15:51:09,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:09,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:09,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:51:09,495 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)] === [2024-06-21 15:51:09,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:09,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1619179585, now seen corresponding path program 2 times [2024-06-21 15:51:09,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:09,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521126557] [2024-06-21 15:51:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:09,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:09,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:09,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521126557] [2024-06-21 15:51:09,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521126557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:09,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:09,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:09,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463815431] [2024-06-21 15:51:09,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:09,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:09,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:09,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:09,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:09,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 188 transitions, 2281 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) [2024-06-21 15:51:09,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:09,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:09,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:10,059 INFO L124 PetriNetUnfolderBase]: 1534/2585 cut-off events. [2024-06-21 15:51:10,059 INFO L125 PetriNetUnfolderBase]: For 115736/115736 co-relation queries the response was YES. [2024-06-21 15:51:10,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 2585 events. 1534/2585 cut-off events. For 115736/115736 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14556 event pairs, 390 based on Foata normal form. 50/2631 useless extension candidates. Maximal degree in co-relation 16468. Up to 2021 conditions per place. [2024-06-21 15:51:10,077 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 36 changer transitions 3/229 dead transitions. [2024-06-21 15:51:10,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 229 transitions, 2887 flow [2024-06-21 15:51:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 15:51:10,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-21 15:51:10,078 INFO L175 Difference]: Start difference. First operand has 159 places, 188 transitions, 2281 flow. Second operand 8 states and 211 transitions. [2024-06-21 15:51:10,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 229 transitions, 2887 flow [2024-06-21 15:51:10,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 229 transitions, 2770 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:10,215 INFO L231 Difference]: Finished difference. Result has 162 places, 188 transitions, 2258 flow [2024-06-21 15:51:10,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2258, PETRI_PLACES=162, PETRI_TRANSITIONS=188} [2024-06-21 15:51:10,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-21 15:51:10,215 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 188 transitions, 2258 flow [2024-06-21 15:51:10,216 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) [2024-06-21 15:51:10,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:10,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:10,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:51:10,216 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)] === [2024-06-21 15:51:10,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:10,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1937386207, now seen corresponding path program 3 times [2024-06-21 15:51:10,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:10,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913138493] [2024-06-21 15:51:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:10,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:10,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:10,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913138493] [2024-06-21 15:51:10,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913138493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:10,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:10,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311189547] [2024-06-21 15:51:10,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:10,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:10,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:10,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:10,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:10,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 188 transitions, 2258 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) [2024-06-21 15:51:10,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:10,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:10,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:10,715 INFO L124 PetriNetUnfolderBase]: 1582/2681 cut-off events. [2024-06-21 15:51:10,716 INFO L125 PetriNetUnfolderBase]: For 99088/99088 co-relation queries the response was YES. [2024-06-21 15:51:10,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16848 conditions, 2681 events. 1582/2681 cut-off events. For 99088/99088 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15293 event pairs, 411 based on Foata normal form. 16/2692 useless extension candidates. Maximal degree in co-relation 16770. Up to 2200 conditions per place. [2024-06-21 15:51:10,735 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 166 selfloop transitions, 45 changer transitions 0/219 dead transitions. [2024-06-21 15:51:10,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 219 transitions, 2798 flow [2024-06-21 15:51:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:51:10,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:51:10,737 INFO L175 Difference]: Start difference. First operand has 162 places, 188 transitions, 2258 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:51:10,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 219 transitions, 2798 flow [2024-06-21 15:51:10,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 219 transitions, 2726 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:10,894 INFO L231 Difference]: Finished difference. Result has 163 places, 189 transitions, 2311 flow [2024-06-21 15:51:10,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2311, PETRI_PLACES=163, PETRI_TRANSITIONS=189} [2024-06-21 15:51:10,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-21 15:51:10,895 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 189 transitions, 2311 flow [2024-06-21 15:51:10,895 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) [2024-06-21 15:51:10,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:10,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:10,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:51:10,895 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)] === [2024-06-21 15:51:10,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:10,895 INFO L85 PathProgramCache]: Analyzing trace with hash 675601279, now seen corresponding path program 4 times [2024-06-21 15:51:10,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:10,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114009170] [2024-06-21 15:51:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:10,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:11,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:11,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114009170] [2024-06-21 15:51:11,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114009170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:11,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:11,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:51:11,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269454204] [2024-06-21 15:51:11,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:11,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:51:11,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:11,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:51:11,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:51:11,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:11,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 189 transitions, 2311 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) [2024-06-21 15:51:11,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:11,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:11,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:11,416 INFO L124 PetriNetUnfolderBase]: 1640/2787 cut-off events. [2024-06-21 15:51:11,416 INFO L125 PetriNetUnfolderBase]: For 105268/105268 co-relation queries the response was YES. [2024-06-21 15:51:11,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17516 conditions, 2787 events. 1640/2787 cut-off events. For 105268/105268 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16060 event pairs, 426 based on Foata normal form. 16/2798 useless extension candidates. Maximal degree in co-relation 17437. Up to 2298 conditions per place. [2024-06-21 15:51:11,437 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 45 changer transitions 0/224 dead transitions. [2024-06-21 15:51:11,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 224 transitions, 2873 flow [2024-06-21 15:51:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 15:51:11,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 15:51:11,438 INFO L175 Difference]: Start difference. First operand has 163 places, 189 transitions, 2311 flow. Second operand 8 states and 201 transitions. [2024-06-21 15:51:11,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 224 transitions, 2873 flow [2024-06-21 15:51:11,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 224 transitions, 2766 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:11,578 INFO L231 Difference]: Finished difference. Result has 166 places, 190 transitions, 2331 flow [2024-06-21 15:51:11,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2331, PETRI_PLACES=166, PETRI_TRANSITIONS=190} [2024-06-21 15:51:11,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-21 15:51:11,578 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 190 transitions, 2331 flow [2024-06-21 15:51:11,579 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) [2024-06-21 15:51:11,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:11,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:11,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:51:11,579 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)] === [2024-06-21 15:51:11,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:11,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2100199249, now seen corresponding path program 5 times [2024-06-21 15:51:11,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:11,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826066620] [2024-06-21 15:51:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:11,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:11,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:11,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826066620] [2024-06-21 15:51:11,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826066620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:11,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:11,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:51:11,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118581974] [2024-06-21 15:51:11,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:11,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:51:11,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:51:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:51:11,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:11,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 190 transitions, 2331 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) [2024-06-21 15:51:11,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:11,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:11,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:12,209 INFO L124 PetriNetUnfolderBase]: 1681/2858 cut-off events. [2024-06-21 15:51:12,209 INFO L125 PetriNetUnfolderBase]: For 107942/107942 co-relation queries the response was YES. [2024-06-21 15:51:12,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17889 conditions, 2858 events. 1681/2858 cut-off events. For 107942/107942 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16653 event pairs, 421 based on Foata normal form. 12/2865 useless extension candidates. Maximal degree in co-relation 17809. Up to 2282 conditions per place. [2024-06-21 15:51:12,230 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 48 changer transitions 0/232 dead transitions. [2024-06-21 15:51:12,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 232 transitions, 2937 flow [2024-06-21 15:51:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:51:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:51:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-21 15:51:12,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:51:12,232 INFO L175 Difference]: Start difference. First operand has 166 places, 190 transitions, 2331 flow. Second operand 9 states and 225 transitions. [2024-06-21 15:51:12,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 232 transitions, 2937 flow [2024-06-21 15:51:12,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 232 transitions, 2828 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:12,378 INFO L231 Difference]: Finished difference. Result has 169 places, 191 transitions, 2356 flow [2024-06-21 15:51:12,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2356, PETRI_PLACES=169, PETRI_TRANSITIONS=191} [2024-06-21 15:51:12,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 15:51:12,379 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 191 transitions, 2356 flow [2024-06-21 15:51:12,379 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) [2024-06-21 15:51:12,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:12,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:12,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:51:12,380 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)] === [2024-06-21 15:51:12,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash 903816141, now seen corresponding path program 1 times [2024-06-21 15:51:12,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:12,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274409107] [2024-06-21 15:51:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:12,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:12,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:12,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274409107] [2024-06-21 15:51:12,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274409107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:12,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:12,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:12,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843231216] [2024-06-21 15:51:12,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:12,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:12,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:12,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:12,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:12,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:12,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 191 transitions, 2356 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) [2024-06-21 15:51:12,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:12,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:12,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:12,869 INFO L124 PetriNetUnfolderBase]: 1808/3091 cut-off events. [2024-06-21 15:51:12,869 INFO L125 PetriNetUnfolderBase]: For 125389/125389 co-relation queries the response was YES. [2024-06-21 15:51:12,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19636 conditions, 3091 events. 1808/3091 cut-off events. For 125389/125389 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18459 event pairs, 463 based on Foata normal form. 12/3098 useless extension candidates. Maximal degree in co-relation 19555. Up to 2183 conditions per place. [2024-06-21 15:51:12,892 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 50 changer transitions 0/228 dead transitions. [2024-06-21 15:51:12,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 228 transitions, 3110 flow [2024-06-21 15:51:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 15:51:12,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 15:51:12,894 INFO L175 Difference]: Start difference. First operand has 169 places, 191 transitions, 2356 flow. Second operand 7 states and 183 transitions. [2024-06-21 15:51:12,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 228 transitions, 3110 flow [2024-06-21 15:51:13,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 228 transitions, 2990 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 15:51:13,087 INFO L231 Difference]: Finished difference. Result has 169 places, 193 transitions, 2408 flow [2024-06-21 15:51:13,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2408, PETRI_PLACES=169, PETRI_TRANSITIONS=193} [2024-06-21 15:51:13,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 15:51:13,088 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 193 transitions, 2408 flow [2024-06-21 15:51:13,088 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) [2024-06-21 15:51:13,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:13,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:13,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:51:13,088 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)] === [2024-06-21 15:51:13,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1734179375, now seen corresponding path program 1 times [2024-06-21 15:51:13,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:13,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944708585] [2024-06-21 15:51:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:13,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:13,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:13,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944708585] [2024-06-21 15:51:13,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944708585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:13,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:13,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:13,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039717541] [2024-06-21 15:51:13,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:13,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:13,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:13,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:13,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:13,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:13,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 193 transitions, 2408 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) [2024-06-21 15:51:13,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:13,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:13,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:13,589 INFO L124 PetriNetUnfolderBase]: 1837/3117 cut-off events. [2024-06-21 15:51:13,589 INFO L125 PetriNetUnfolderBase]: For 125591/125591 co-relation queries the response was YES. [2024-06-21 15:51:13,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20184 conditions, 3117 events. 1837/3117 cut-off events. For 125591/125591 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18528 event pairs, 492 based on Foata normal form. 1/3109 useless extension candidates. Maximal degree in co-relation 20102. Up to 2635 conditions per place. [2024-06-21 15:51:13,614 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 68 changer transitions 0/227 dead transitions. [2024-06-21 15:51:13,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 227 transitions, 3358 flow [2024-06-21 15:51:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:51:13,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 15:51:13,615 INFO L175 Difference]: Start difference. First operand has 169 places, 193 transitions, 2408 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:51:13,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 227 transitions, 3358 flow [2024-06-21 15:51:13,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 227 transitions, 3275 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 15:51:13,792 INFO L231 Difference]: Finished difference. Result has 175 places, 205 transitions, 2779 flow [2024-06-21 15:51:13,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2779, PETRI_PLACES=175, PETRI_TRANSITIONS=205} [2024-06-21 15:51:13,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-21 15:51:13,792 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 205 transitions, 2779 flow [2024-06-21 15:51:13,792 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) [2024-06-21 15:51:13,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:13,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:13,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 15:51:13,793 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)] === [2024-06-21 15:51:13,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1739893295, now seen corresponding path program 2 times [2024-06-21 15:51:13,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:13,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641001544] [2024-06-21 15:51:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:13,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:13,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:13,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641001544] [2024-06-21 15:51:13,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641001544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:13,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:13,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:13,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452034894] [2024-06-21 15:51:13,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:13,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:13,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:13,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:13,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 205 transitions, 2779 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) [2024-06-21 15:51:13,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:13,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:13,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:14,294 INFO L124 PetriNetUnfolderBase]: 1870/3176 cut-off events. [2024-06-21 15:51:14,295 INFO L125 PetriNetUnfolderBase]: For 131225/131225 co-relation queries the response was YES. [2024-06-21 15:51:14,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21142 conditions, 3176 events. 1870/3176 cut-off events. For 131225/131225 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18958 event pairs, 473 based on Foata normal form. 1/3173 useless extension candidates. Maximal degree in co-relation 21055. Up to 2840 conditions per place. [2024-06-21 15:51:14,381 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 39 changer transitions 0/242 dead transitions. [2024-06-21 15:51:14,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 242 transitions, 3707 flow [2024-06-21 15:51:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:14,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:51:14,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:51:14,383 INFO L175 Difference]: Start difference. First operand has 175 places, 205 transitions, 2779 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:51:14,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 242 transitions, 3707 flow [2024-06-21 15:51:14,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 242 transitions, 3592 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-21 15:51:14,577 INFO L231 Difference]: Finished difference. Result has 182 places, 222 transitions, 3085 flow [2024-06-21 15:51:14,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2024-06-21 15:51:14,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-21 15:51:14,578 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 3085 flow [2024-06-21 15:51:14,578 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) [2024-06-21 15:51:14,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:14,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:14,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 15:51:14,578 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)] === [2024-06-21 15:51:14,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:14,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1246037629, now seen corresponding path program 6 times [2024-06-21 15:51:14,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:14,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508378450] [2024-06-21 15:51:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:14,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:14,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:14,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508378450] [2024-06-21 15:51:14,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508378450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:14,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:14,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:14,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403821963] [2024-06-21 15:51:14,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:14,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:14,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:14,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:14,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 3085 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) [2024-06-21 15:51:14,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:14,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:14,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:15,141 INFO L124 PetriNetUnfolderBase]: 1928/3277 cut-off events. [2024-06-21 15:51:15,141 INFO L125 PetriNetUnfolderBase]: For 150766/150772 co-relation queries the response was YES. [2024-06-21 15:51:15,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21725 conditions, 3277 events. 1928/3277 cut-off events. For 150766/150772 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19857 event pairs, 522 based on Foata normal form. 20/3286 useless extension candidates. Maximal degree in co-relation 21635. Up to 2766 conditions per place. [2024-06-21 15:51:15,169 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 44 changer transitions 0/250 dead transitions. [2024-06-21 15:51:15,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 250 transitions, 3687 flow [2024-06-21 15:51:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:51:15,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:51:15,171 INFO L175 Difference]: Start difference. First operand has 182 places, 222 transitions, 3085 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:51:15,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 250 transitions, 3687 flow [2024-06-21 15:51:15,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 250 transitions, 3590 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 15:51:15,414 INFO L231 Difference]: Finished difference. Result has 187 places, 223 transitions, 3119 flow [2024-06-21 15:51:15,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3119, PETRI_PLACES=187, PETRI_TRANSITIONS=223} [2024-06-21 15:51:15,414 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-21 15:51:15,414 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 223 transitions, 3119 flow [2024-06-21 15:51:15,415 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) [2024-06-21 15:51:15,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:15,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:15,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 15:51:15,415 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)] === [2024-06-21 15:51:15,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:15,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1257406367, now seen corresponding path program 7 times [2024-06-21 15:51:15,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:15,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592024735] [2024-06-21 15:51:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:15,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:15,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:15,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592024735] [2024-06-21 15:51:15,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592024735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:15,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:15,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:51:15,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071541764] [2024-06-21 15:51:15,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:15,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:51:15,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:15,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:51:15,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:51:15,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:15,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 223 transitions, 3119 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) [2024-06-21 15:51:15,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:15,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:15,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:16,079 INFO L124 PetriNetUnfolderBase]: 1900/3218 cut-off events. [2024-06-21 15:51:16,079 INFO L125 PetriNetUnfolderBase]: For 145049/145049 co-relation queries the response was YES. [2024-06-21 15:51:16,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21068 conditions, 3218 events. 1900/3218 cut-off events. For 145049/145049 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19356 event pairs, 510 based on Foata normal form. 16/3220 useless extension candidates. Maximal degree in co-relation 20977. Up to 2722 conditions per place. [2024-06-21 15:51:16,107 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 47 changer transitions 0/254 dead transitions. [2024-06-21 15:51:16,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 254 transitions, 3705 flow [2024-06-21 15:51:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 15:51:16,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 15:51:16,110 INFO L175 Difference]: Start difference. First operand has 187 places, 223 transitions, 3119 flow. Second operand 8 states and 197 transitions. [2024-06-21 15:51:16,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 254 transitions, 3705 flow [2024-06-21 15:51:16,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 254 transitions, 3578 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:16,346 INFO L231 Difference]: Finished difference. Result has 190 places, 223 transitions, 3093 flow [2024-06-21 15:51:16,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3093, PETRI_PLACES=190, PETRI_TRANSITIONS=223} [2024-06-21 15:51:16,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-21 15:51:16,346 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 223 transitions, 3093 flow [2024-06-21 15:51:16,347 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) [2024-06-21 15:51:16,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:16,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:16,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 15:51:16,347 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)] === [2024-06-21 15:51:16,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:16,348 INFO L85 PathProgramCache]: Analyzing trace with hash -899415367, now seen corresponding path program 8 times [2024-06-21 15:51:16,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:16,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120960336] [2024-06-21 15:51:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:16,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:16,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:16,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120960336] [2024-06-21 15:51:16,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120960336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:16,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:16,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:51:16,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476540821] [2024-06-21 15:51:16,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:16,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:51:16,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:51:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:51:16,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:16,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 223 transitions, 3093 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) [2024-06-21 15:51:16,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:16,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:16,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:17,030 INFO L124 PetriNetUnfolderBase]: 1916/3250 cut-off events. [2024-06-21 15:51:17,030 INFO L125 PetriNetUnfolderBase]: For 142247/142247 co-relation queries the response was YES. [2024-06-21 15:51:17,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20886 conditions, 3250 events. 1916/3250 cut-off events. For 142247/142247 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19583 event pairs, 503 based on Foata normal form. 12/3248 useless extension candidates. Maximal degree in co-relation 20794. Up to 2667 conditions per place. [2024-06-21 15:51:17,061 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 204 selfloop transitions, 50 changer transitions 0/262 dead transitions. [2024-06-21 15:51:17,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 262 transitions, 3757 flow [2024-06-21 15:51:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:51:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:51:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 15:51:17,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-21 15:51:17,063 INFO L175 Difference]: Start difference. First operand has 190 places, 223 transitions, 3093 flow. Second operand 9 states and 221 transitions. [2024-06-21 15:51:17,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 262 transitions, 3757 flow [2024-06-21 15:51:17,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 262 transitions, 3662 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:17,364 INFO L231 Difference]: Finished difference. Result has 194 places, 224 transitions, 3142 flow [2024-06-21 15:51:17,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3142, PETRI_PLACES=194, PETRI_TRANSITIONS=224} [2024-06-21 15:51:17,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-21 15:51:17,365 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 224 transitions, 3142 flow [2024-06-21 15:51:17,365 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) [2024-06-21 15:51:17,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:17,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:17,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 15:51:17,366 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)] === [2024-06-21 15:51:17,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:17,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1025244427, now seen corresponding path program 2 times [2024-06-21 15:51:17,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:17,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439218550] [2024-06-21 15:51:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:17,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:17,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439218550] [2024-06-21 15:51:17,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439218550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:17,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:17,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516446667] [2024-06-21 15:51:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:17,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:17,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:17,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:17,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 224 transitions, 3142 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) [2024-06-21 15:51:17,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:17,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:17,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:17,901 INFO L124 PetriNetUnfolderBase]: 1957/3346 cut-off events. [2024-06-21 15:51:17,901 INFO L125 PetriNetUnfolderBase]: For 150839/150845 co-relation queries the response was YES. [2024-06-21 15:51:17,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21439 conditions, 3346 events. 1957/3346 cut-off events. For 150839/150845 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20470 event pairs, 514 based on Foata normal form. 16/3351 useless extension candidates. Maximal degree in co-relation 21346. Up to 2738 conditions per place. [2024-06-21 15:51:17,928 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 201 selfloop transitions, 46 changer transitions 0/255 dead transitions. [2024-06-21 15:51:17,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3772 flow [2024-06-21 15:51:17,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:51:17,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:51:17,929 INFO L175 Difference]: Start difference. First operand has 194 places, 224 transitions, 3142 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:51:17,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3772 flow [2024-06-21 15:51:18,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 255 transitions, 3642 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 15:51:18,238 INFO L231 Difference]: Finished difference. Result has 194 places, 225 transitions, 3150 flow [2024-06-21 15:51:18,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3150, PETRI_PLACES=194, PETRI_TRANSITIONS=225} [2024-06-21 15:51:18,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-21 15:51:18,239 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 225 transitions, 3150 flow [2024-06-21 15:51:18,239 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) [2024-06-21 15:51:18,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:18,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:18,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 15:51:18,240 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)] === [2024-06-21 15:51:18,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash -584919781, now seen corresponding path program 3 times [2024-06-21 15:51:18,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:18,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368710175] [2024-06-21 15:51:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:18,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:18,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:18,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368710175] [2024-06-21 15:51:18,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368710175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:18,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:18,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:18,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286953528] [2024-06-21 15:51:18,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:18,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:18,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:18,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:18,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:18,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:18,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 225 transitions, 3150 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) [2024-06-21 15:51:18,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:18,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:18,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:18,821 INFO L124 PetriNetUnfolderBase]: 1937/3314 cut-off events. [2024-06-21 15:51:18,821 INFO L125 PetriNetUnfolderBase]: For 144062/144068 co-relation queries the response was YES. [2024-06-21 15:51:18,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20692 conditions, 3314 events. 1937/3314 cut-off events. For 144062/144068 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20318 event pairs, 459 based on Foata normal form. 16/3319 useless extension candidates. Maximal degree in co-relation 20598. Up to 2141 conditions per place. [2024-06-21 15:51:18,847 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 55 changer transitions 0/255 dead transitions. [2024-06-21 15:51:18,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 255 transitions, 3672 flow [2024-06-21 15:51:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:51:18,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 15:51:18,848 INFO L175 Difference]: Start difference. First operand has 194 places, 225 transitions, 3150 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:51:18,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 255 transitions, 3672 flow [2024-06-21 15:51:19,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 255 transitions, 3542 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:19,147 INFO L231 Difference]: Finished difference. Result has 194 places, 224 transitions, 3062 flow [2024-06-21 15:51:19,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3062, PETRI_PLACES=194, PETRI_TRANSITIONS=224} [2024-06-21 15:51:19,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-21 15:51:19,147 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 224 transitions, 3062 flow [2024-06-21 15:51:19,148 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) [2024-06-21 15:51:19,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:19,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:19,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 15:51:19,148 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)] === [2024-06-21 15:51:19,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash 548871599, now seen corresponding path program 3 times [2024-06-21 15:51:19,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:19,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667878280] [2024-06-21 15:51:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:19,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:19,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667878280] [2024-06-21 15:51:19,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667878280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:19,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:19,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:19,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760850045] [2024-06-21 15:51:19,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:19,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:19,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:19,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:19,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:19,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:19,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 224 transitions, 3062 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) [2024-06-21 15:51:19,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:19,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:19,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:19,623 INFO L124 PetriNetUnfolderBase]: 1942/3304 cut-off events. [2024-06-21 15:51:19,623 INFO L125 PetriNetUnfolderBase]: For 131451/131451 co-relation queries the response was YES. [2024-06-21 15:51:19,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20656 conditions, 3304 events. 1942/3304 cut-off events. For 131451/131451 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20041 event pairs, 509 based on Foata normal form. 1/3297 useless extension candidates. Maximal degree in co-relation 20562. Up to 2793 conditions per place. [2024-06-21 15:51:19,652 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 74 changer transitions 0/246 dead transitions. [2024-06-21 15:51:19,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 246 transitions, 3927 flow [2024-06-21 15:51:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:51:19,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:51:19,653 INFO L175 Difference]: Start difference. First operand has 194 places, 224 transitions, 3062 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:51:19,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 246 transitions, 3927 flow [2024-06-21 15:51:19,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 246 transitions, 3751 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:19,899 INFO L231 Difference]: Finished difference. Result has 194 places, 227 transitions, 3101 flow [2024-06-21 15:51:19,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3101, PETRI_PLACES=194, PETRI_TRANSITIONS=227} [2024-06-21 15:51:19,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-21 15:51:19,900 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 227 transitions, 3101 flow [2024-06-21 15:51:19,900 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) [2024-06-21 15:51:19,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:19,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:19,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 15:51:19,900 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)] === [2024-06-21 15:51:19,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash 118420861, now seen corresponding path program 4 times [2024-06-21 15:51:19,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:19,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811971334] [2024-06-21 15:51:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:19,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:19,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:19,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811971334] [2024-06-21 15:51:19,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811971334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:19,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:19,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702900640] [2024-06-21 15:51:19,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:19,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:19,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:19,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:19,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:20,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:20,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 227 transitions, 3101 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) [2024-06-21 15:51:20,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:20,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:20,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:20,437 INFO L124 PetriNetUnfolderBase]: 1934/3292 cut-off events. [2024-06-21 15:51:20,437 INFO L125 PetriNetUnfolderBase]: For 132811/132811 co-relation queries the response was YES. [2024-06-21 15:51:20,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20194 conditions, 3292 events. 1934/3292 cut-off events. For 132811/132811 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19963 event pairs, 508 based on Foata normal form. 2/3286 useless extension candidates. Maximal degree in co-relation 20100. Up to 2788 conditions per place. [2024-06-21 15:51:20,468 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 70 changer transitions 0/242 dead transitions. [2024-06-21 15:51:20,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 242 transitions, 3797 flow [2024-06-21 15:51:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:51:20,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:51:20,469 INFO L175 Difference]: Start difference. First operand has 194 places, 227 transitions, 3101 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:51:20,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 242 transitions, 3797 flow [2024-06-21 15:51:20,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 242 transitions, 3603 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-21 15:51:20,743 INFO L231 Difference]: Finished difference. Result has 197 places, 227 transitions, 3055 flow [2024-06-21 15:51:20,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3055, PETRI_PLACES=197, PETRI_TRANSITIONS=227} [2024-06-21 15:51:20,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 15:51:20,744 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 227 transitions, 3055 flow [2024-06-21 15:51:20,745 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) [2024-06-21 15:51:20,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:20,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:20,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 15:51:20,745 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)] === [2024-06-21 15:51:20,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:20,746 INFO L85 PathProgramCache]: Analyzing trace with hash -793475779, now seen corresponding path program 5 times [2024-06-21 15:51:20,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:20,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347358113] [2024-06-21 15:51:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:20,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:20,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347358113] [2024-06-21 15:51:20,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347358113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:20,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:20,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:20,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930233365] [2024-06-21 15:51:20,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:20,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:20,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:20,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:20,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:20,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:20,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 227 transitions, 3055 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) [2024-06-21 15:51:20,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:20,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:20,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:21,247 INFO L124 PetriNetUnfolderBase]: 1928/3286 cut-off events. [2024-06-21 15:51:21,248 INFO L125 PetriNetUnfolderBase]: For 134049/134049 co-relation queries the response was YES. [2024-06-21 15:51:21,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19957 conditions, 3286 events. 1928/3286 cut-off events. For 134049/134049 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19959 event pairs, 500 based on Foata normal form. 2/3282 useless extension candidates. Maximal degree in co-relation 19863. Up to 2767 conditions per place. [2024-06-21 15:51:21,279 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 155 selfloop transitions, 86 changer transitions 0/249 dead transitions. [2024-06-21 15:51:21,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 249 transitions, 3806 flow [2024-06-21 15:51:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 15:51:21,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-21 15:51:21,280 INFO L175 Difference]: Start difference. First operand has 197 places, 227 transitions, 3055 flow. Second operand 6 states and 160 transitions. [2024-06-21 15:51:21,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 249 transitions, 3806 flow [2024-06-21 15:51:21,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 249 transitions, 3612 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:21,546 INFO L231 Difference]: Finished difference. Result has 197 places, 227 transitions, 3048 flow [2024-06-21 15:51:21,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3048, PETRI_PLACES=197, PETRI_TRANSITIONS=227} [2024-06-21 15:51:21,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 15:51:21,546 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 227 transitions, 3048 flow [2024-06-21 15:51:21,547 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) [2024-06-21 15:51:21,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:21,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:21,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 15:51:21,547 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)] === [2024-06-21 15:51:21,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:21,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1912306031, now seen corresponding path program 6 times [2024-06-21 15:51:21,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:21,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800858] [2024-06-21 15:51:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:21,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:21,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:21,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800858] [2024-06-21 15:51:21,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:21,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:21,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:21,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332432563] [2024-06-21 15:51:21,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:21,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:21,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:21,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:21,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:21,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 227 transitions, 3048 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) [2024-06-21 15:51:21,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:21,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:21,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:22,090 INFO L124 PetriNetUnfolderBase]: 1920/3283 cut-off events. [2024-06-21 15:51:22,091 INFO L125 PetriNetUnfolderBase]: For 135025/135025 co-relation queries the response was YES. [2024-06-21 15:51:22,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19834 conditions, 3283 events. 1920/3283 cut-off events. For 135025/135025 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19891 event pairs, 479 based on Foata normal form. 2/3281 useless extension candidates. Maximal degree in co-relation 19739. Up to 2762 conditions per place. [2024-06-21 15:51:22,118 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 152 selfloop transitions, 96 changer transitions 0/256 dead transitions. [2024-06-21 15:51:22,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 256 transitions, 3833 flow [2024-06-21 15:51:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 15:51:22,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662020905923345 [2024-06-21 15:51:22,119 INFO L175 Difference]: Start difference. First operand has 197 places, 227 transitions, 3048 flow. Second operand 7 states and 190 transitions. [2024-06-21 15:51:22,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 256 transitions, 3833 flow [2024-06-21 15:51:22,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 256 transitions, 3574 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:22,418 INFO L231 Difference]: Finished difference. Result has 198 places, 227 transitions, 3008 flow [2024-06-21 15:51:22,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3008, PETRI_PLACES=198, PETRI_TRANSITIONS=227} [2024-06-21 15:51:22,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-21 15:51:22,419 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 227 transitions, 3008 flow [2024-06-21 15:51:22,419 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) [2024-06-21 15:51:22,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:22,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:22,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 15:51:22,420 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)] === [2024-06-21 15:51:22,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash 114710874, now seen corresponding path program 1 times [2024-06-21 15:51:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125182085] [2024-06-21 15:51:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:22,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:22,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:22,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125182085] [2024-06-21 15:51:22,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125182085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:22,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:22,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:22,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609292930] [2024-06-21 15:51:22,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:22,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:22,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:22,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:22,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 227 transitions, 3008 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) [2024-06-21 15:51:22,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:22,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:22,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:22,926 INFO L124 PetriNetUnfolderBase]: 1948/3328 cut-off events. [2024-06-21 15:51:22,926 INFO L125 PetriNetUnfolderBase]: For 144297/144303 co-relation queries the response was YES. [2024-06-21 15:51:22,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20323 conditions, 3328 events. 1948/3328 cut-off events. For 144297/144303 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20328 event pairs, 513 based on Foata normal form. 6/3327 useless extension candidates. Maximal degree in co-relation 20227. Up to 2808 conditions per place. [2024-06-21 15:51:22,954 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 71 changer transitions 0/251 dead transitions. [2024-06-21 15:51:22,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 251 transitions, 3879 flow [2024-06-21 15:51:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:51:22,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:51:22,955 INFO L175 Difference]: Start difference. First operand has 198 places, 227 transitions, 3008 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:51:22,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 251 transitions, 3879 flow [2024-06-21 15:51:23,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 251 transitions, 3664 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:23,251 INFO L231 Difference]: Finished difference. Result has 199 places, 236 transitions, 3106 flow [2024-06-21 15:51:23,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3106, PETRI_PLACES=199, PETRI_TRANSITIONS=236} [2024-06-21 15:51:23,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-21 15:51:23,252 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 236 transitions, 3106 flow [2024-06-21 15:51:23,252 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) [2024-06-21 15:51:23,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:23,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:23,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 15:51:23,252 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)] === [2024-06-21 15:51:23,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 708439832, now seen corresponding path program 2 times [2024-06-21 15:51:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:23,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444136275] [2024-06-21 15:51:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:23,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:23,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:23,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444136275] [2024-06-21 15:51:23,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444136275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:23,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:23,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:23,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970947962] [2024-06-21 15:51:23,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:23,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:23,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:23,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:23,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:23,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 236 transitions, 3106 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) [2024-06-21 15:51:23,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:23,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:23,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:23,995 INFO L124 PetriNetUnfolderBase]: 1958/3338 cut-off events. [2024-06-21 15:51:23,996 INFO L125 PetriNetUnfolderBase]: For 143504/143504 co-relation queries the response was YES. [2024-06-21 15:51:24,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20443 conditions, 3338 events. 1958/3338 cut-off events. For 143504/143504 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20416 event pairs, 506 based on Foata normal form. 2/3332 useless extension candidates. Maximal degree in co-relation 20345. Up to 2818 conditions per place. [2024-06-21 15:51:24,021 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 86 changer transitions 0/259 dead transitions. [2024-06-21 15:51:24,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 259 transitions, 4027 flow [2024-06-21 15:51:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:51:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:51:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-21 15:51:24,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-21 15:51:24,022 INFO L175 Difference]: Start difference. First operand has 199 places, 236 transitions, 3106 flow. Second operand 9 states and 212 transitions. [2024-06-21 15:51:24,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 259 transitions, 4027 flow [2024-06-21 15:51:24,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 259 transitions, 3888 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 15:51:24,267 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 3215 flow [2024-06-21 15:51:24,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3215, PETRI_PLACES=206, PETRI_TRANSITIONS=240} [2024-06-21 15:51:24,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-21 15:51:24,267 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 3215 flow [2024-06-21 15:51:24,268 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) [2024-06-21 15:51:24,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:24,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:24,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 15:51:24,268 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)] === [2024-06-21 15:51:24,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:24,269 INFO L85 PathProgramCache]: Analyzing trace with hash -437109334, now seen corresponding path program 3 times [2024-06-21 15:51:24,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:24,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61080296] [2024-06-21 15:51:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:24,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:24,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:24,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61080296] [2024-06-21 15:51:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61080296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:24,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:24,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:24,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315008169] [2024-06-21 15:51:24,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:24,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:24,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:24,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:24,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:24,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:24,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 240 transitions, 3215 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) [2024-06-21 15:51:24,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:24,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:24,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:24,777 INFO L124 PetriNetUnfolderBase]: 1954/3334 cut-off events. [2024-06-21 15:51:24,777 INFO L125 PetriNetUnfolderBase]: For 146531/146531 co-relation queries the response was YES. [2024-06-21 15:51:24,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20344 conditions, 3334 events. 1954/3334 cut-off events. For 146531/146531 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20358 event pairs, 507 based on Foata normal form. 2/3328 useless extension candidates. Maximal degree in co-relation 20245. Up to 2816 conditions per place. [2024-06-21 15:51:24,809 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 80 changer transitions 0/256 dead transitions. [2024-06-21 15:51:24,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 256 transitions, 3957 flow [2024-06-21 15:51:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 15:51:24,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 15:51:24,810 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 3215 flow. Second operand 7 states and 171 transitions. [2024-06-21 15:51:24,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 256 transitions, 3957 flow [2024-06-21 15:51:25,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 256 transitions, 3671 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 15:51:25,089 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 3097 flow [2024-06-21 15:51:25,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3097, PETRI_PLACES=206, PETRI_TRANSITIONS=240} [2024-06-21 15:51:25,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-21 15:51:25,090 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 3097 flow [2024-06-21 15:51:25,090 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) [2024-06-21 15:51:25,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:25,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:25,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 15:51:25,090 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)] === [2024-06-21 15:51:25,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:25,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1905630708, now seen corresponding path program 4 times [2024-06-21 15:51:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:25,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054964003] [2024-06-21 15:51:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:25,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:25,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:25,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054964003] [2024-06-21 15:51:25,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054964003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:25,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:25,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:25,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915713592] [2024-06-21 15:51:25,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:25,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:25,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:25,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:25,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:25,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 240 transitions, 3097 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) [2024-06-21 15:51:25,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:25,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:25,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:25,647 INFO L124 PetriNetUnfolderBase]: 1971/3367 cut-off events. [2024-06-21 15:51:25,647 INFO L125 PetriNetUnfolderBase]: For 151789/151789 co-relation queries the response was YES. [2024-06-21 15:51:25,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20409 conditions, 3367 events. 1971/3367 cut-off events. For 151789/151789 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20580 event pairs, 496 based on Foata normal form. 3/3364 useless extension candidates. Maximal degree in co-relation 20311. Up to 2829 conditions per place. [2024-06-21 15:51:25,673 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 93 changer transitions 0/264 dead transitions. [2024-06-21 15:51:25,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 264 transitions, 3845 flow [2024-06-21 15:51:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 15:51:25,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 15:51:25,674 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 3097 flow. Second operand 6 states and 156 transitions. [2024-06-21 15:51:25,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 264 transitions, 3845 flow [2024-06-21 15:51:25,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 264 transitions, 3679 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:25,968 INFO L231 Difference]: Finished difference. Result has 206 places, 247 transitions, 3221 flow [2024-06-21 15:51:25,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3221, PETRI_PLACES=206, PETRI_TRANSITIONS=247} [2024-06-21 15:51:25,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-21 15:51:25,969 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 247 transitions, 3221 flow [2024-06-21 15:51:25,969 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) [2024-06-21 15:51:25,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:25,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:25,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 15:51:25,970 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)] === [2024-06-21 15:51:25,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:25,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1905625128, now seen corresponding path program 5 times [2024-06-21 15:51:25,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:25,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070853868] [2024-06-21 15:51:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:25,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:26,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:26,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070853868] [2024-06-21 15:51:26,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070853868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:26,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:26,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:26,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751401558] [2024-06-21 15:51:26,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:26,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:26,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:26,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:26,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:26,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:26,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 247 transitions, 3221 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) [2024-06-21 15:51:26,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:26,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:26,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:26,493 INFO L124 PetriNetUnfolderBase]: 1962/3355 cut-off events. [2024-06-21 15:51:26,493 INFO L125 PetriNetUnfolderBase]: For 152428/152428 co-relation queries the response was YES. [2024-06-21 15:51:26,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20290 conditions, 3355 events. 1962/3355 cut-off events. For 152428/152428 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20519 event pairs, 493 based on Foata normal form. 3/3352 useless extension candidates. Maximal degree in co-relation 20191. Up to 2821 conditions per place. [2024-06-21 15:51:26,522 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 98 changer transitions 0/262 dead transitions. [2024-06-21 15:51:26,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 262 transitions, 3873 flow [2024-06-21 15:51:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 15:51:26,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 15:51:26,523 INFO L175 Difference]: Start difference. First operand has 206 places, 247 transitions, 3221 flow. Second operand 7 states and 174 transitions. [2024-06-21 15:51:26,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 262 transitions, 3873 flow [2024-06-21 15:51:26,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 262 transitions, 3624 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:26,834 INFO L231 Difference]: Finished difference. Result has 208 places, 247 transitions, 3181 flow [2024-06-21 15:51:26,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3181, PETRI_PLACES=208, PETRI_TRANSITIONS=247} [2024-06-21 15:51:26,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-21 15:51:26,835 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 247 transitions, 3181 flow [2024-06-21 15:51:26,835 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) [2024-06-21 15:51:26,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:26,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:26,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 15:51:26,835 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)] === [2024-06-21 15:51:26,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:26,835 INFO L85 PathProgramCache]: Analyzing trace with hash -410012270, now seen corresponding path program 1 times [2024-06-21 15:51:26,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:26,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996661290] [2024-06-21 15:51:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:26,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:26,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:26,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996661290] [2024-06-21 15:51:26,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996661290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:26,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:26,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:26,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434721308] [2024-06-21 15:51:26,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:26,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:26,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:26,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:26,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:26,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:26,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 247 transitions, 3181 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) [2024-06-21 15:51:26,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:26,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:26,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:27,351 INFO L124 PetriNetUnfolderBase]: 1999/3418 cut-off events. [2024-06-21 15:51:27,352 INFO L125 PetriNetUnfolderBase]: For 161196/161196 co-relation queries the response was YES. [2024-06-21 15:51:27,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20884 conditions, 3418 events. 1999/3418 cut-off events. For 161196/161196 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20884 event pairs, 503 based on Foata normal form. 1/3408 useless extension candidates. Maximal degree in co-relation 20785. Up to 2861 conditions per place. [2024-06-21 15:51:27,381 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 107 changer transitions 0/279 dead transitions. [2024-06-21 15:51:27,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 279 transitions, 4164 flow [2024-06-21 15:51:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 15:51:27,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-21 15:51:27,452 INFO L175 Difference]: Start difference. First operand has 208 places, 247 transitions, 3181 flow. Second operand 6 states and 157 transitions. [2024-06-21 15:51:27,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 279 transitions, 4164 flow [2024-06-21 15:51:27,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 279 transitions, 3934 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:27,813 INFO L231 Difference]: Finished difference. Result has 208 places, 258 transitions, 3340 flow [2024-06-21 15:51:27,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2960, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3340, PETRI_PLACES=208, PETRI_TRANSITIONS=258} [2024-06-21 15:51:27,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-21 15:51:27,814 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 258 transitions, 3340 flow [2024-06-21 15:51:27,814 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) [2024-06-21 15:51:27,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:27,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:27,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 15:51:27,815 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)] === [2024-06-21 15:51:27,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:27,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2075013290, now seen corresponding path program 2 times [2024-06-21 15:51:27,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:27,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114443630] [2024-06-21 15:51:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:27,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:27,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:27,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114443630] [2024-06-21 15:51:27,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114443630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:27,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:27,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:27,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805889593] [2024-06-21 15:51:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:27,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:27,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:27,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:27,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 258 transitions, 3340 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) [2024-06-21 15:51:27,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:27,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:27,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:28,365 INFO L124 PetriNetUnfolderBase]: 2004/3427 cut-off events. [2024-06-21 15:51:28,365 INFO L125 PetriNetUnfolderBase]: For 166494/166494 co-relation queries the response was YES. [2024-06-21 15:51:28,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21065 conditions, 3427 events. 2004/3427 cut-off events. For 166494/166494 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20987 event pairs, 503 based on Foata normal form. 1/3417 useless extension candidates. Maximal degree in co-relation 20965. Up to 2865 conditions per place. [2024-06-21 15:51:28,395 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 109 changer transitions 0/282 dead transitions. [2024-06-21 15:51:28,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 282 transitions, 4095 flow [2024-06-21 15:51:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:51:28,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:51:28,396 INFO L175 Difference]: Start difference. First operand has 208 places, 258 transitions, 3340 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:51:28,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 282 transitions, 4095 flow [2024-06-21 15:51:28,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 282 transitions, 3938 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 15:51:28,764 INFO L231 Difference]: Finished difference. Result has 213 places, 261 transitions, 3450 flow [2024-06-21 15:51:28,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3450, PETRI_PLACES=213, PETRI_TRANSITIONS=261} [2024-06-21 15:51:28,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-21 15:51:28,765 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 261 transitions, 3450 flow [2024-06-21 15:51:28,765 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) [2024-06-21 15:51:28,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:28,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:28,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 15:51:28,766 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)] === [2024-06-21 15:51:28,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1888056718, now seen corresponding path program 3 times [2024-06-21 15:51:28,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:28,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987276140] [2024-06-21 15:51:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:28,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:28,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:28,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987276140] [2024-06-21 15:51:28,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987276140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:28,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:28,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:28,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424552866] [2024-06-21 15:51:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:28,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:28,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:28,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:28,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:28,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:28,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 261 transitions, 3450 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) [2024-06-21 15:51:28,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:28,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:28,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:29,343 INFO L124 PetriNetUnfolderBase]: 2001/3427 cut-off events. [2024-06-21 15:51:29,344 INFO L125 PetriNetUnfolderBase]: For 170064/170064 co-relation queries the response was YES. [2024-06-21 15:51:29,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21110 conditions, 3427 events. 2001/3427 cut-off events. For 170064/170064 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21038 event pairs, 475 based on Foata normal form. 1/3424 useless extension candidates. Maximal degree in co-relation 21009. Up to 3057 conditions per place. [2024-06-21 15:51:29,373 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 39 changer transitions 0/279 dead transitions. [2024-06-21 15:51:29,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 279 transitions, 4049 flow [2024-06-21 15:51:29,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:29,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 15:51:29,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 15:51:29,374 INFO L175 Difference]: Start difference. First operand has 213 places, 261 transitions, 3450 flow. Second operand 7 states and 170 transitions. [2024-06-21 15:51:29,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 279 transitions, 4049 flow [2024-06-21 15:51:29,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 279 transitions, 3805 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:29,793 INFO L231 Difference]: Finished difference. Result has 215 places, 261 transitions, 3296 flow [2024-06-21 15:51:29,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3296, PETRI_PLACES=215, PETRI_TRANSITIONS=261} [2024-06-21 15:51:29,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-21 15:51:29,794 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 261 transitions, 3296 flow [2024-06-21 15:51:29,794 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) [2024-06-21 15:51:29,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:29,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:29,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 15:51:29,795 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)] === [2024-06-21 15:51:29,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:29,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1049553066, now seen corresponding path program 4 times [2024-06-21 15:51:29,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:29,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166824860] [2024-06-21 15:51:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:29,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:29,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:29,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166824860] [2024-06-21 15:51:29,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166824860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:29,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:29,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:29,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113248157] [2024-06-21 15:51:29,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:29,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:29,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:29,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:29,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:29,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:29,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 261 transitions, 3296 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) [2024-06-21 15:51:29,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:29,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:29,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:30,409 INFO L124 PetriNetUnfolderBase]: 2006/3420 cut-off events. [2024-06-21 15:51:30,409 INFO L125 PetriNetUnfolderBase]: For 175620/175620 co-relation queries the response was YES. [2024-06-21 15:51:30,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20966 conditions, 3420 events. 2006/3420 cut-off events. For 175620/175620 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20920 event pairs, 522 based on Foata normal form. 1/3413 useless extension candidates. Maximal degree in co-relation 20864. Up to 2867 conditions per place. [2024-06-21 15:51:30,441 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 174 selfloop transitions, 100 changer transitions 0/282 dead transitions. [2024-06-21 15:51:30,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 282 transitions, 4044 flow [2024-06-21 15:51:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 15:51:30,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 15:51:30,443 INFO L175 Difference]: Start difference. First operand has 215 places, 261 transitions, 3296 flow. Second operand 7 states and 170 transitions. [2024-06-21 15:51:30,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 282 transitions, 4044 flow [2024-06-21 15:51:30,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 282 transitions, 3966 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:30,811 INFO L231 Difference]: Finished difference. Result has 216 places, 264 transitions, 3466 flow [2024-06-21 15:51:30,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3466, PETRI_PLACES=216, PETRI_TRANSITIONS=264} [2024-06-21 15:51:30,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-21 15:51:30,812 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 264 transitions, 3466 flow [2024-06-21 15:51:30,812 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) [2024-06-21 15:51:30,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:30,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:30,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 15:51:30,812 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)] === [2024-06-21 15:51:30,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1407797414, now seen corresponding path program 5 times [2024-06-21 15:51:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:30,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533025323] [2024-06-21 15:51:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:30,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:30,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:30,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533025323] [2024-06-21 15:51:30,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533025323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:30,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:30,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:30,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836452349] [2024-06-21 15:51:30,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:30,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:30,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:30,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:30,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:30,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:30,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 264 transitions, 3466 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) [2024-06-21 15:51:30,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:30,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:30,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:31,329 INFO L124 PetriNetUnfolderBase]: 2011/3443 cut-off events. [2024-06-21 15:51:31,329 INFO L125 PetriNetUnfolderBase]: For 182939/182945 co-relation queries the response was YES. [2024-06-21 15:51:31,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21376 conditions, 3443 events. 2011/3443 cut-off events. For 182939/182945 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21167 event pairs, 513 based on Foata normal form. 5/3441 useless extension candidates. Maximal degree in co-relation 21273. Up to 2871 conditions per place. [2024-06-21 15:51:31,360 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 99 changer transitions 0/285 dead transitions. [2024-06-21 15:51:31,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 285 transitions, 4344 flow [2024-06-21 15:51:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 15:51:31,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 15:51:31,361 INFO L175 Difference]: Start difference. First operand has 216 places, 264 transitions, 3466 flow. Second operand 6 states and 152 transitions. [2024-06-21 15:51:31,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 285 transitions, 4344 flow [2024-06-21 15:51:31,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 285 transitions, 4204 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:31,668 INFO L231 Difference]: Finished difference. Result has 218 places, 267 transitions, 3574 flow [2024-06-21 15:51:31,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3328, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3574, PETRI_PLACES=218, PETRI_TRANSITIONS=267} [2024-06-21 15:51:31,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-21 15:51:31,668 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 267 transitions, 3574 flow [2024-06-21 15:51:31,669 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) [2024-06-21 15:51:31,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:31,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:31,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 15:51:31,669 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)] === [2024-06-21 15:51:31,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:31,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1427107602, now seen corresponding path program 6 times [2024-06-21 15:51:31,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:31,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778397351] [2024-06-21 15:51:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:31,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:31,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:31,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778397351] [2024-06-21 15:51:31,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778397351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:31,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:31,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:31,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547837078] [2024-06-21 15:51:31,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:31,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:31,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:31,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:31,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:31,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:31,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 267 transitions, 3574 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) [2024-06-21 15:51:31,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:31,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:31,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:32,206 INFO L124 PetriNetUnfolderBase]: 2003/3431 cut-off events. [2024-06-21 15:51:32,207 INFO L125 PetriNetUnfolderBase]: For 187651/187657 co-relation queries the response was YES. [2024-06-21 15:51:32,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21311 conditions, 3431 events. 2003/3431 cut-off events. For 187651/187657 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21116 event pairs, 513 based on Foata normal form. 6/3430 useless extension candidates. Maximal degree in co-relation 21206. Up to 2863 conditions per place. [2024-06-21 15:51:32,235 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 182 selfloop transitions, 91 changer transitions 0/281 dead transitions. [2024-06-21 15:51:32,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 281 transitions, 4274 flow [2024-06-21 15:51:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 15:51:32,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-21 15:51:32,236 INFO L175 Difference]: Start difference. First operand has 218 places, 267 transitions, 3574 flow. Second operand 6 states and 149 transitions. [2024-06-21 15:51:32,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 281 transitions, 4274 flow [2024-06-21 15:51:32,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 281 transitions, 4071 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 15:51:32,722 INFO L231 Difference]: Finished difference. Result has 221 places, 267 transitions, 3561 flow [2024-06-21 15:51:32,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3561, PETRI_PLACES=221, PETRI_TRANSITIONS=267} [2024-06-21 15:51:32,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-21 15:51:32,723 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 267 transitions, 3561 flow [2024-06-21 15:51:32,723 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) [2024-06-21 15:51:32,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:32,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:32,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 15:51:32,724 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)] === [2024-06-21 15:51:32,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash 495281992, now seen corresponding path program 7 times [2024-06-21 15:51:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:32,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90567233] [2024-06-21 15:51:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:32,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:32,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:32,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90567233] [2024-06-21 15:51:32,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90567233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:32,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:32,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:32,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957355326] [2024-06-21 15:51:32,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:32,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:32,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 267 transitions, 3561 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) [2024-06-21 15:51:32,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:32,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:32,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:33,260 INFO L124 PetriNetUnfolderBase]: 1997/3415 cut-off events. [2024-06-21 15:51:33,261 INFO L125 PetriNetUnfolderBase]: For 188977/188977 co-relation queries the response was YES. [2024-06-21 15:51:33,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21209 conditions, 3415 events. 1997/3415 cut-off events. For 188977/188977 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20992 event pairs, 513 based on Foata normal form. 2/3409 useless extension candidates. Maximal degree in co-relation 21103. Up to 2858 conditions per place. [2024-06-21 15:51:33,291 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 102 changer transitions 0/285 dead transitions. [2024-06-21 15:51:33,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 285 transitions, 4401 flow [2024-06-21 15:51:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:51:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:51:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-21 15:51:33,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-21 15:51:33,292 INFO L175 Difference]: Start difference. First operand has 221 places, 267 transitions, 3561 flow. Second operand 9 states and 211 transitions. [2024-06-21 15:51:33,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 285 transitions, 4401 flow [2024-06-21 15:51:33,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 285 transitions, 4209 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:33,694 INFO L231 Difference]: Finished difference. Result has 225 places, 267 transitions, 3580 flow [2024-06-21 15:51:33,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3580, PETRI_PLACES=225, PETRI_TRANSITIONS=267} [2024-06-21 15:51:33,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-21 15:51:33,695 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 267 transitions, 3580 flow [2024-06-21 15:51:33,695 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) [2024-06-21 15:51:33,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:33,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:33,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 15:51:33,695 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)] === [2024-06-21 15:51:33,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash -665501196, now seen corresponding path program 8 times [2024-06-21 15:51:33,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:33,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962328565] [2024-06-21 15:51:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:33,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:33,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:33,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962328565] [2024-06-21 15:51:33,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962328565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:33,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:33,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:33,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313848933] [2024-06-21 15:51:33,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:33,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:33,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:33,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:33,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:33,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 267 transitions, 3580 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) [2024-06-21 15:51:33,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:33,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:33,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:34,216 INFO L124 PetriNetUnfolderBase]: 1989/3403 cut-off events. [2024-06-21 15:51:34,216 INFO L125 PetriNetUnfolderBase]: For 190387/190387 co-relation queries the response was YES. [2024-06-21 15:51:34,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21143 conditions, 3403 events. 1989/3403 cut-off events. For 190387/190387 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20918 event pairs, 513 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 21036. Up to 2850 conditions per place. [2024-06-21 15:51:34,246 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 98 changer transitions 0/282 dead transitions. [2024-06-21 15:51:34,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 282 transitions, 4288 flow [2024-06-21 15:51:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 15:51:34,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 15:51:34,247 INFO L175 Difference]: Start difference. First operand has 225 places, 267 transitions, 3580 flow. Second operand 7 states and 170 transitions. [2024-06-21 15:51:34,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 282 transitions, 4288 flow [2024-06-21 15:51:34,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 282 transitions, 3976 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 15:51:34,727 INFO L231 Difference]: Finished difference. Result has 224 places, 267 transitions, 3473 flow [2024-06-21 15:51:34,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3473, PETRI_PLACES=224, PETRI_TRANSITIONS=267} [2024-06-21 15:51:34,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-21 15:51:34,728 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 267 transitions, 3473 flow [2024-06-21 15:51:34,728 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) [2024-06-21 15:51:34,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:34,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:34,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 15:51:34,729 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)] === [2024-06-21 15:51:34,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:34,729 INFO L85 PathProgramCache]: Analyzing trace with hash 848056116, now seen corresponding path program 9 times [2024-06-21 15:51:34,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:34,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861943279] [2024-06-21 15:51:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:34,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:34,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:34,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861943279] [2024-06-21 15:51:34,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861943279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:34,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:34,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559950279] [2024-06-21 15:51:34,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:34,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:34,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:34,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:34,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 267 transitions, 3473 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) [2024-06-21 15:51:34,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:34,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:34,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:35,284 INFO L124 PetriNetUnfolderBase]: 1983/3405 cut-off events. [2024-06-21 15:51:35,284 INFO L125 PetriNetUnfolderBase]: For 188910/188910 co-relation queries the response was YES. [2024-06-21 15:51:35,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20956 conditions, 3405 events. 1983/3405 cut-off events. For 188910/188910 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20948 event pairs, 475 based on Foata normal form. 2/3403 useless extension candidates. Maximal degree in co-relation 20849. Up to 2849 conditions per place. [2024-06-21 15:51:35,315 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 109 changer transitions 0/294 dead transitions. [2024-06-21 15:51:35,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 294 transitions, 4239 flow [2024-06-21 15:51:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 15:51:35,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 15:51:35,316 INFO L175 Difference]: Start difference. First operand has 224 places, 267 transitions, 3473 flow. Second operand 7 states and 189 transitions. [2024-06-21 15:51:35,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 294 transitions, 4239 flow [2024-06-21 15:51:35,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 294 transitions, 4031 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:35,866 INFO L231 Difference]: Finished difference. Result has 225 places, 267 transitions, 3512 flow [2024-06-21 15:51:35,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3512, PETRI_PLACES=225, PETRI_TRANSITIONS=267} [2024-06-21 15:51:35,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-21 15:51:35,867 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 267 transitions, 3512 flow [2024-06-21 15:51:35,867 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) [2024-06-21 15:51:35,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:35,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:35,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 15:51:35,867 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)] === [2024-06-21 15:51:35,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1172322470, now seen corresponding path program 10 times [2024-06-21 15:51:35,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:35,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33792101] [2024-06-21 15:51:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:35,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:35,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:35,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33792101] [2024-06-21 15:51:35,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33792101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:35,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:35,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173216241] [2024-06-21 15:51:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:35,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:35,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:35,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 267 transitions, 3512 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) [2024-06-21 15:51:35,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:35,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:35,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:36,421 INFO L124 PetriNetUnfolderBase]: 1975/3385 cut-off events. [2024-06-21 15:51:36,422 INFO L125 PetriNetUnfolderBase]: For 190348/190348 co-relation queries the response was YES. [2024-06-21 15:51:36,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20869 conditions, 3385 events. 1975/3385 cut-off events. For 190348/190348 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20804 event pairs, 495 based on Foata normal form. 2/3381 useless extension candidates. Maximal degree in co-relation 20761. Up to 2841 conditions per place. [2024-06-21 15:51:36,453 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 183 selfloop transitions, 95 changer transitions 0/286 dead transitions. [2024-06-21 15:51:36,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 286 transitions, 4116 flow [2024-06-21 15:51:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 15:51:36,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-21 15:51:36,454 INFO L175 Difference]: Start difference. First operand has 225 places, 267 transitions, 3512 flow. Second operand 6 states and 158 transitions. [2024-06-21 15:51:36,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 286 transitions, 4116 flow [2024-06-21 15:51:36,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 286 transitions, 3929 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 15:51:36,956 INFO L231 Difference]: Finished difference. Result has 224 places, 267 transitions, 3528 flow [2024-06-21 15:51:36,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3325, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3528, PETRI_PLACES=224, PETRI_TRANSITIONS=267} [2024-06-21 15:51:36,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-21 15:51:36,956 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 267 transitions, 3528 flow [2024-06-21 15:51:36,957 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) [2024-06-21 15:51:36,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:36,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:36,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 15:51:36,957 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)] === [2024-06-21 15:51:36,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:36,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1276399050, now seen corresponding path program 1 times [2024-06-21 15:51:36,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:36,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994377829] [2024-06-21 15:51:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:36,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:37,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:37,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994377829] [2024-06-21 15:51:37,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994377829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:37,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:37,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:37,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246093183] [2024-06-21 15:51:37,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:37,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:37,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:37,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:37,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:37,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:51:37,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 267 transitions, 3528 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) [2024-06-21 15:51:37,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:37,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:51:37,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:37,473 INFO L124 PetriNetUnfolderBase]: 1908/3320 cut-off events. [2024-06-21 15:51:37,473 INFO L125 PetriNetUnfolderBase]: For 191107/191107 co-relation queries the response was YES. [2024-06-21 15:51:37,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20349 conditions, 3320 events. 1908/3320 cut-off events. For 191107/191107 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20705 event pairs, 347 based on Foata normal form. 7/3304 useless extension candidates. Maximal degree in co-relation 20243. Up to 2753 conditions per place. [2024-06-21 15:51:37,504 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 216 selfloop transitions, 30 changer transitions 1/290 dead transitions. [2024-06-21 15:51:37,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 290 transitions, 4102 flow [2024-06-21 15:51:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:51:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:51:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-21 15:51:37,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6731707317073171 [2024-06-21 15:51:37,506 INFO L175 Difference]: Start difference. First operand has 224 places, 267 transitions, 3528 flow. Second operand 5 states and 138 transitions. [2024-06-21 15:51:37,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 290 transitions, 4102 flow [2024-06-21 15:51:38,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 290 transitions, 3750 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 15:51:38,032 INFO L231 Difference]: Finished difference. Result has 220 places, 268 transitions, 3259 flow [2024-06-21 15:51:38,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3259, PETRI_PLACES=220, PETRI_TRANSITIONS=268} [2024-06-21 15:51:38,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-21 15:51:38,033 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 268 transitions, 3259 flow [2024-06-21 15:51:38,033 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) [2024-06-21 15:51:38,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:38,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:38,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 15:51:38,033 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)] === [2024-06-21 15:51:38,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:38,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1291636170, now seen corresponding path program 2 times [2024-06-21 15:51:38,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:38,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443371209] [2024-06-21 15:51:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:38,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:38,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:38,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443371209] [2024-06-21 15:51:38,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443371209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:38,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:38,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:38,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855884194] [2024-06-21 15:51:38,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:38,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:38,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:38,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:38,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:51:38,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 268 transitions, 3259 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) [2024-06-21 15:51:38,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:38,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:51:38,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:38,616 INFO L124 PetriNetUnfolderBase]: 1910/3323 cut-off events. [2024-06-21 15:51:38,616 INFO L125 PetriNetUnfolderBase]: For 182233/182238 co-relation queries the response was YES. [2024-06-21 15:51:38,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19828 conditions, 3323 events. 1910/3323 cut-off events. For 182233/182238 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20872 event pairs, 337 based on Foata normal form. 13/3313 useless extension candidates. Maximal degree in co-relation 19722. Up to 2652 conditions per place. [2024-06-21 15:51:38,645 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 221 selfloop transitions, 25 changer transitions 0/289 dead transitions. [2024-06-21 15:51:38,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 289 transitions, 3957 flow [2024-06-21 15:51:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:51:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:51:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-21 15:51:38,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-06-21 15:51:38,646 INFO L175 Difference]: Start difference. First operand has 220 places, 268 transitions, 3259 flow. Second operand 5 states and 132 transitions. [2024-06-21 15:51:38,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 289 transitions, 3957 flow [2024-06-21 15:51:39,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 289 transitions, 3902 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 15:51:39,082 INFO L231 Difference]: Finished difference. Result has 222 places, 269 transitions, 3270 flow [2024-06-21 15:51:39,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3270, PETRI_PLACES=222, PETRI_TRANSITIONS=269} [2024-06-21 15:51:39,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 15:51:39,083 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 269 transitions, 3270 flow [2024-06-21 15:51:39,083 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) [2024-06-21 15:51:39,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:39,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:39,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 15:51:39,083 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)] === [2024-06-21 15:51:39,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:39,083 INFO L85 PathProgramCache]: Analyzing trace with hash -741790972, now seen corresponding path program 1 times [2024-06-21 15:51:39,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:39,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956738740] [2024-06-21 15:51:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:39,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:39,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:39,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956738740] [2024-06-21 15:51:39,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956738740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:39,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:39,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:39,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680223337] [2024-06-21 15:51:39,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:39,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:39,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:39,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:39,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:39,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:39,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 269 transitions, 3270 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) [2024-06-21 15:51:39,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:39,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:39,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:39,650 INFO L124 PetriNetUnfolderBase]: 2013/3457 cut-off events. [2024-06-21 15:51:39,650 INFO L125 PetriNetUnfolderBase]: For 176983/176989 co-relation queries the response was YES. [2024-06-21 15:51:39,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20624 conditions, 3457 events. 2013/3457 cut-off events. For 176983/176989 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 21363 event pairs, 453 based on Foata normal form. 6/3460 useless extension candidates. Maximal degree in co-relation 20517. Up to 3089 conditions per place. [2024-06-21 15:51:39,682 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 255 selfloop transitions, 29 changer transitions 0/292 dead transitions. [2024-06-21 15:51:39,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 292 transitions, 4082 flow [2024-06-21 15:51:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 15:51:39,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-21 15:51:39,683 INFO L175 Difference]: Start difference. First operand has 222 places, 269 transitions, 3270 flow. Second operand 6 states and 146 transitions. [2024-06-21 15:51:39,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 292 transitions, 4082 flow [2024-06-21 15:51:40,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 292 transitions, 4039 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 15:51:40,195 INFO L231 Difference]: Finished difference. Result has 226 places, 273 transitions, 3366 flow [2024-06-21 15:51:40,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3366, PETRI_PLACES=226, PETRI_TRANSITIONS=273} [2024-06-21 15:51:40,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-21 15:51:40,196 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 273 transitions, 3366 flow [2024-06-21 15:51:40,196 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) [2024-06-21 15:51:40,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:40,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:40,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 15:51:40,196 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)] === [2024-06-21 15:51:40,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash -182782248, now seen corresponding path program 2 times [2024-06-21 15:51:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:40,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779843216] [2024-06-21 15:51:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:40,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:40,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:40,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779843216] [2024-06-21 15:51:40,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779843216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:40,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:40,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:40,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233379364] [2024-06-21 15:51:40,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:40,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:40,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:40,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:40,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:40,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 273 transitions, 3366 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) [2024-06-21 15:51:40,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:40,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:40,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:40,739 INFO L124 PetriNetUnfolderBase]: 2021/3474 cut-off events. [2024-06-21 15:51:40,739 INFO L125 PetriNetUnfolderBase]: For 182500/182506 co-relation queries the response was YES. [2024-06-21 15:51:40,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20777 conditions, 3474 events. 2021/3474 cut-off events. For 182500/182506 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21502 event pairs, 484 based on Foata normal form. 6/3477 useless extension candidates. Maximal degree in co-relation 20669. Up to 3134 conditions per place. [2024-06-21 15:51:40,771 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 255 selfloop transitions, 26 changer transitions 0/289 dead transitions. [2024-06-21 15:51:40,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 289 transitions, 4002 flow [2024-06-21 15:51:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 15:51:40,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 15:51:40,772 INFO L175 Difference]: Start difference. First operand has 226 places, 273 transitions, 3366 flow. Second operand 6 states and 141 transitions. [2024-06-21 15:51:40,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 289 transitions, 4002 flow [2024-06-21 15:51:41,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 289 transitions, 3908 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-21 15:51:41,561 INFO L231 Difference]: Finished difference. Result has 230 places, 275 transitions, 3373 flow [2024-06-21 15:51:41,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3373, PETRI_PLACES=230, PETRI_TRANSITIONS=275} [2024-06-21 15:51:41,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-21 15:51:41,562 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 275 transitions, 3373 flow [2024-06-21 15:51:41,562 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) [2024-06-21 15:51:41,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:41,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:41,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 15:51:41,563 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)] === [2024-06-21 15:51:41,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:41,563 INFO L85 PathProgramCache]: Analyzing trace with hash 486621522, now seen corresponding path program 3 times [2024-06-21 15:51:41,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:41,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902542696] [2024-06-21 15:51:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:41,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:41,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:41,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902542696] [2024-06-21 15:51:41,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902542696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:41,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:41,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:41,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011079195] [2024-06-21 15:51:41,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:41,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:41,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:41,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:41,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 275 transitions, 3373 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) [2024-06-21 15:51:41,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:41,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:41,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:42,120 INFO L124 PetriNetUnfolderBase]: 2029/3482 cut-off events. [2024-06-21 15:51:42,120 INFO L125 PetriNetUnfolderBase]: For 187293/187293 co-relation queries the response was YES. [2024-06-21 15:51:42,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20850 conditions, 3482 events. 2029/3482 cut-off events. For 187293/187293 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21460 event pairs, 484 based on Foata normal form. 2/3480 useless extension candidates. Maximal degree in co-relation 20740. Up to 3146 conditions per place. [2024-06-21 15:51:42,152 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 256 selfloop transitions, 28 changer transitions 0/292 dead transitions. [2024-06-21 15:51:42,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 292 transitions, 4003 flow [2024-06-21 15:51:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 15:51:42,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-21 15:51:42,154 INFO L175 Difference]: Start difference. First operand has 230 places, 275 transitions, 3373 flow. Second operand 7 states and 160 transitions. [2024-06-21 15:51:42,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 292 transitions, 4003 flow [2024-06-21 15:51:42,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 292 transitions, 3940 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:42,718 INFO L231 Difference]: Finished difference. Result has 233 places, 277 transitions, 3401 flow [2024-06-21 15:51:42,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3401, PETRI_PLACES=233, PETRI_TRANSITIONS=277} [2024-06-21 15:51:42,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-21 15:51:42,719 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 277 transitions, 3401 flow [2024-06-21 15:51:42,719 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) [2024-06-21 15:51:42,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:42,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:42,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 15:51:42,719 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)] === [2024-06-21 15:51:42,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash -665306578, now seen corresponding path program 1 times [2024-06-21 15:51:42,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:42,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079093232] [2024-06-21 15:51:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:42,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:42,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:42,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079093232] [2024-06-21 15:51:42,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079093232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:42,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:42,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:42,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513767426] [2024-06-21 15:51:42,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:42,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:42,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:42,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:42,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:42,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:42,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 277 transitions, 3401 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) [2024-06-21 15:51:42,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:42,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:42,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:43,347 INFO L124 PetriNetUnfolderBase]: 2045/3490 cut-off events. [2024-06-21 15:51:43,348 INFO L125 PetriNetUnfolderBase]: For 198703/198703 co-relation queries the response was YES. [2024-06-21 15:51:43,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21126 conditions, 3490 events. 2045/3490 cut-off events. For 198703/198703 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21516 event pairs, 530 based on Foata normal form. 4/3486 useless extension candidates. Maximal degree in co-relation 21015. Up to 2935 conditions per place. [2024-06-21 15:51:43,380 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 102 changer transitions 0/295 dead transitions. [2024-06-21 15:51:43,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 295 transitions, 4071 flow [2024-06-21 15:51:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 15:51:43,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:51:43,381 INFO L175 Difference]: Start difference. First operand has 233 places, 277 transitions, 3401 flow. Second operand 7 states and 168 transitions. [2024-06-21 15:51:43,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 295 transitions, 4071 flow [2024-06-21 15:51:43,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 295 transitions, 4000 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:43,938 INFO L231 Difference]: Finished difference. Result has 235 places, 280 transitions, 3606 flow [2024-06-21 15:51:43,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3606, PETRI_PLACES=235, PETRI_TRANSITIONS=280} [2024-06-21 15:51:43,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 15:51:43,939 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 280 transitions, 3606 flow [2024-06-21 15:51:43,939 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) [2024-06-21 15:51:43,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:43,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:43,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 15:51:43,939 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)] === [2024-06-21 15:51:43,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1524015788, now seen corresponding path program 4 times [2024-06-21 15:51:43,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:43,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829004528] [2024-06-21 15:51:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:43,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:44,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829004528] [2024-06-21 15:51:44,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829004528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:44,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:44,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:51:44,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127888057] [2024-06-21 15:51:44,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:51:44,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:44,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:51:44,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:51:44,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:44,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 280 transitions, 3606 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) [2024-06-21 15:51:44,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:44,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:44,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:44,571 INFO L124 PetriNetUnfolderBase]: 2040/3497 cut-off events. [2024-06-21 15:51:44,571 INFO L125 PetriNetUnfolderBase]: For 195684/195684 co-relation queries the response was YES. [2024-06-21 15:51:44,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21402 conditions, 3497 events. 2040/3497 cut-off events. For 195684/195684 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21521 event pairs, 446 based on Foata normal form. 2/3497 useless extension candidates. Maximal degree in co-relation 21290. Up to 3154 conditions per place. [2024-06-21 15:51:44,600 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 270 selfloop transitions, 22 changer transitions 0/300 dead transitions. [2024-06-21 15:51:44,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 300 transitions, 4240 flow [2024-06-21 15:51:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:51:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:51:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 15:51:44,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 15:51:44,601 INFO L175 Difference]: Start difference. First operand has 235 places, 280 transitions, 3606 flow. Second operand 6 states and 148 transitions. [2024-06-21 15:51:44,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 300 transitions, 4240 flow [2024-06-21 15:51:45,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 300 transitions, 3974 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:45,085 INFO L231 Difference]: Finished difference. Result has 236 places, 280 transitions, 3392 flow [2024-06-21 15:51:45,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3392, PETRI_PLACES=236, PETRI_TRANSITIONS=280} [2024-06-21 15:51:45,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-21 15:51:45,086 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 280 transitions, 3392 flow [2024-06-21 15:51:45,087 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) [2024-06-21 15:51:45,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:45,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:45,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 15:51:45,087 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)] === [2024-06-21 15:51:45,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1055171084, now seen corresponding path program 2 times [2024-06-21 15:51:45,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:45,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763284035] [2024-06-21 15:51:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763284035] [2024-06-21 15:51:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763284035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:45,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:45,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681852016] [2024-06-21 15:51:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:45,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:45,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 280 transitions, 3392 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) [2024-06-21 15:51:45,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:45,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:45,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:45,759 INFO L124 PetriNetUnfolderBase]: 2084/3560 cut-off events. [2024-06-21 15:51:45,760 INFO L125 PetriNetUnfolderBase]: For 225442/225442 co-relation queries the response was YES. [2024-06-21 15:51:45,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21649 conditions, 3560 events. 2084/3560 cut-off events. For 225442/225442 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22038 event pairs, 504 based on Foata normal form. 12/3566 useless extension candidates. Maximal degree in co-relation 21536. Up to 2968 conditions per place. [2024-06-21 15:51:45,795 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 100 changer transitions 0/304 dead transitions. [2024-06-21 15:51:45,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 304 transitions, 4116 flow [2024-06-21 15:51:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:51:45,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:51:45,797 INFO L175 Difference]: Start difference. First operand has 236 places, 280 transitions, 3392 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:51:45,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 304 transitions, 4116 flow [2024-06-21 15:51:46,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 304 transitions, 4058 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:46,339 INFO L231 Difference]: Finished difference. Result has 238 places, 283 transitions, 3614 flow [2024-06-21 15:51:46,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3614, PETRI_PLACES=238, PETRI_TRANSITIONS=283} [2024-06-21 15:51:46,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-21 15:51:46,340 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 283 transitions, 3614 flow [2024-06-21 15:51:46,340 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) [2024-06-21 15:51:46,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:46,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:46,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 15:51:46,341 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)] === [2024-06-21 15:51:46,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:46,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1283072234, now seen corresponding path program 3 times [2024-06-21 15:51:46,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:46,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415758482] [2024-06-21 15:51:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:46,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:46,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:46,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415758482] [2024-06-21 15:51:46,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415758482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:46,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:46,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:46,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408258155] [2024-06-21 15:51:46,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:46,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:46,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:46,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:46,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:46,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:46,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 283 transitions, 3614 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) [2024-06-21 15:51:46,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:46,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:46,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:47,025 INFO L124 PetriNetUnfolderBase]: 2128/3618 cut-off events. [2024-06-21 15:51:47,026 INFO L125 PetriNetUnfolderBase]: For 236750/236750 co-relation queries the response was YES. [2024-06-21 15:51:47,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22728 conditions, 3618 events. 2128/3618 cut-off events. For 236750/236750 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22370 event pairs, 509 based on Foata normal form. 12/3624 useless extension candidates. Maximal degree in co-relation 22614. Up to 3036 conditions per place. [2024-06-21 15:51:47,065 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 103 changer transitions 0/305 dead transitions. [2024-06-21 15:51:47,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 305 transitions, 4340 flow [2024-06-21 15:51:47,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 15:51:47,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 15:51:47,066 INFO L175 Difference]: Start difference. First operand has 238 places, 283 transitions, 3614 flow. Second operand 8 states and 196 transitions. [2024-06-21 15:51:47,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 305 transitions, 4340 flow [2024-06-21 15:51:47,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 305 transitions, 4092 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 15:51:47,669 INFO L231 Difference]: Finished difference. Result has 241 places, 286 transitions, 3658 flow [2024-06-21 15:51:47,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3658, PETRI_PLACES=241, PETRI_TRANSITIONS=286} [2024-06-21 15:51:47,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-21 15:51:47,670 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 286 transitions, 3658 flow [2024-06-21 15:51:47,670 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) [2024-06-21 15:51:47,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:47,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:47,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 15:51:47,671 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)] === [2024-06-21 15:51:47,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:47,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1291643114, now seen corresponding path program 4 times [2024-06-21 15:51:47,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:47,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895706757] [2024-06-21 15:51:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:47,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:47,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:47,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895706757] [2024-06-21 15:51:47,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895706757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:47,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:47,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:47,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329660826] [2024-06-21 15:51:47,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:47,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:47,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:47,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:47,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:47,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:47,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 286 transitions, 3658 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) [2024-06-21 15:51:47,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:47,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:47,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:48,677 INFO L124 PetriNetUnfolderBase]: 2398/4064 cut-off events. [2024-06-21 15:51:48,678 INFO L125 PetriNetUnfolderBase]: For 338825/338825 co-relation queries the response was YES. [2024-06-21 15:51:48,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27505 conditions, 4064 events. 2398/4064 cut-off events. For 338825/338825 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25597 event pairs, 613 based on Foata normal form. 12/4070 useless extension candidates. Maximal degree in co-relation 27390. Up to 2917 conditions per place. [2024-06-21 15:51:48,743 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 201 selfloop transitions, 109 changer transitions 0/318 dead transitions. [2024-06-21 15:51:48,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 318 transitions, 4645 flow [2024-06-21 15:51:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 15:51:48,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 15:51:48,744 INFO L175 Difference]: Start difference. First operand has 241 places, 286 transitions, 3658 flow. Second operand 8 states and 202 transitions. [2024-06-21 15:51:48,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 318 transitions, 4645 flow [2024-06-21 15:51:49,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 318 transitions, 4385 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 15:51:49,498 INFO L231 Difference]: Finished difference. Result has 244 places, 292 transitions, 3785 flow [2024-06-21 15:51:49,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3785, PETRI_PLACES=244, PETRI_TRANSITIONS=292} [2024-06-21 15:51:49,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-21 15:51:49,499 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 292 transitions, 3785 flow [2024-06-21 15:51:49,499 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) [2024-06-21 15:51:49,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:49,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:49,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 15:51:49,499 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)] === [2024-06-21 15:51:49,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:49,499 INFO L85 PathProgramCache]: Analyzing trace with hash -990747232, now seen corresponding path program 1 times [2024-06-21 15:51:49,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:49,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678109594] [2024-06-21 15:51:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:49,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:49,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:49,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678109594] [2024-06-21 15:51:49,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678109594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:49,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:49,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:49,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448232480] [2024-06-21 15:51:49,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:49,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:49,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:49,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:49,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:49,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:49,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 292 transitions, 3785 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) [2024-06-21 15:51:49,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:49,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:49,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:50,178 INFO L124 PetriNetUnfolderBase]: 2411/4102 cut-off events. [2024-06-21 15:51:50,178 INFO L125 PetriNetUnfolderBase]: For 320588/320588 co-relation queries the response was YES. [2024-06-21 15:51:50,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27799 conditions, 4102 events. 2411/4102 cut-off events. For 320588/320588 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25907 event pairs, 628 based on Foata normal form. 1/4099 useless extension candidates. Maximal degree in co-relation 27682. Up to 3672 conditions per place. [2024-06-21 15:51:50,219 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 50 changer transitions 0/329 dead transitions. [2024-06-21 15:51:50,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 329 transitions, 4761 flow [2024-06-21 15:51:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 15:51:50,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 15:51:50,220 INFO L175 Difference]: Start difference. First operand has 244 places, 292 transitions, 3785 flow. Second operand 8 states and 201 transitions. [2024-06-21 15:51:50,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 329 transitions, 4761 flow [2024-06-21 15:51:50,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 329 transitions, 4555 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:51,003 INFO L231 Difference]: Finished difference. Result has 249 places, 298 transitions, 3822 flow [2024-06-21 15:51:51,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3822, PETRI_PLACES=249, PETRI_TRANSITIONS=298} [2024-06-21 15:51:51,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 15:51:51,004 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 298 transitions, 3822 flow [2024-06-21 15:51:51,004 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) [2024-06-21 15:51:51,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:51,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:51,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 15:51:51,005 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)] === [2024-06-21 15:51:51,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:51,005 INFO L85 PathProgramCache]: Analyzing trace with hash 393192562, now seen corresponding path program 2 times [2024-06-21 15:51:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:51,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910794212] [2024-06-21 15:51:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:51,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:51,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:51,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910794212] [2024-06-21 15:51:51,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910794212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:51,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:51,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:51,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736335980] [2024-06-21 15:51:51,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:51,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:51,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:51,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:51,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:51,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:51,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 298 transitions, 3822 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) [2024-06-21 15:51:51,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:51,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:51,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:51,761 INFO L124 PetriNetUnfolderBase]: 2448/4153 cut-off events. [2024-06-21 15:51:51,761 INFO L125 PetriNetUnfolderBase]: For 346537/346537 co-relation queries the response was YES. [2024-06-21 15:51:51,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28701 conditions, 4153 events. 2448/4153 cut-off events. For 346537/346537 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26223 event pairs, 660 based on Foata normal form. 1/4138 useless extension candidates. Maximal degree in co-relation 28581. Up to 3295 conditions per place. [2024-06-21 15:51:51,798 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 155 changer transitions 0/340 dead transitions. [2024-06-21 15:51:51,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 340 transitions, 5320 flow [2024-06-21 15:51:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 15:51:51,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-21 15:51:51,799 INFO L175 Difference]: Start difference. First operand has 249 places, 298 transitions, 3822 flow. Second operand 7 states and 185 transitions. [2024-06-21 15:51:51,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 340 transitions, 5320 flow [2024-06-21 15:51:52,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 340 transitions, 5192 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:52,524 INFO L231 Difference]: Finished difference. Result has 253 places, 312 transitions, 4291 flow [2024-06-21 15:51:52,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4291, PETRI_PLACES=253, PETRI_TRANSITIONS=312} [2024-06-21 15:51:52,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 15:51:52,525 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 312 transitions, 4291 flow [2024-06-21 15:51:52,525 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) [2024-06-21 15:51:52,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:52,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:52,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 15:51:52,525 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)] === [2024-06-21 15:51:52,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:52,525 INFO L85 PathProgramCache]: Analyzing trace with hash 403668082, now seen corresponding path program 3 times [2024-06-21 15:51:52,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:52,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863837139] [2024-06-21 15:51:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:52,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:52,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:52,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863837139] [2024-06-21 15:51:52,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863837139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:52,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:52,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:52,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281135005] [2024-06-21 15:51:52,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:52,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:52,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:52,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:52,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:52,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 312 transitions, 4291 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) [2024-06-21 15:51:52,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:52,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:52,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:53,228 INFO L124 PetriNetUnfolderBase]: 2453/4158 cut-off events. [2024-06-21 15:51:53,228 INFO L125 PetriNetUnfolderBase]: For 360761/360761 co-relation queries the response was YES. [2024-06-21 15:51:53,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29954 conditions, 4158 events. 2453/4158 cut-off events. For 360761/360761 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26259 event pairs, 658 based on Foata normal form. 1/4143 useless extension candidates. Maximal degree in co-relation 29831. Up to 3297 conditions per place. [2024-06-21 15:51:53,271 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 157 changer transitions 0/340 dead transitions. [2024-06-21 15:51:53,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 340 transitions, 5622 flow [2024-06-21 15:51:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 15:51:53,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 15:51:53,272 INFO L175 Difference]: Start difference. First operand has 253 places, 312 transitions, 4291 flow. Second operand 7 states and 181 transitions. [2024-06-21 15:51:53,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 340 transitions, 5622 flow [2024-06-21 15:51:54,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 340 transitions, 5427 flow, removed 83 selfloop flow, removed 1 redundant places. [2024-06-21 15:51:54,112 INFO L231 Difference]: Finished difference. Result has 259 places, 315 transitions, 4501 flow [2024-06-21 15:51:54,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4501, PETRI_PLACES=259, PETRI_TRANSITIONS=315} [2024-06-21 15:51:54,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-21 15:51:54,112 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 315 transitions, 4501 flow [2024-06-21 15:51:54,112 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) [2024-06-21 15:51:54,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:54,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:54,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 15:51:54,113 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)] === [2024-06-21 15:51:54,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1314171190, now seen corresponding path program 4 times [2024-06-21 15:51:54,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:54,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504034408] [2024-06-21 15:51:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:54,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:54,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:54,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504034408] [2024-06-21 15:51:54,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504034408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:54,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:54,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:54,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755297817] [2024-06-21 15:51:54,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:54,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:54,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:54,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:54,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:54,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:54,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 315 transitions, 4501 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) [2024-06-21 15:51:54,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:54,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:54,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:54,874 INFO L124 PetriNetUnfolderBase]: 2466/4188 cut-off events. [2024-06-21 15:51:54,874 INFO L125 PetriNetUnfolderBase]: For 367048/367048 co-relation queries the response was YES. [2024-06-21 15:51:54,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29341 conditions, 4188 events. 2466/4188 cut-off events. For 367048/367048 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26509 event pairs, 627 based on Foata normal form. 1/4185 useless extension candidates. Maximal degree in co-relation 29215. Up to 3772 conditions per place. [2024-06-21 15:51:54,920 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 44 changer transitions 0/341 dead transitions. [2024-06-21 15:51:54,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 341 transitions, 5494 flow [2024-06-21 15:51:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 15:51:54,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 15:51:54,921 INFO L175 Difference]: Start difference. First operand has 259 places, 315 transitions, 4501 flow. Second operand 8 states and 190 transitions. [2024-06-21 15:51:54,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 341 transitions, 5494 flow [2024-06-21 15:51:56,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 341 transitions, 5162 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:56,042 INFO L231 Difference]: Finished difference. Result has 264 places, 321 transitions, 4407 flow [2024-06-21 15:51:56,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4407, PETRI_PLACES=264, PETRI_TRANSITIONS=321} [2024-06-21 15:51:56,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-21 15:51:56,042 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 321 transitions, 4407 flow [2024-06-21 15:51:56,042 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) [2024-06-21 15:51:56,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:56,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:56,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 15:51:56,043 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)] === [2024-06-21 15:51:56,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:56,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1305899258, now seen corresponding path program 5 times [2024-06-21 15:51:56,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:56,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131811615] [2024-06-21 15:51:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:56,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:56,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:56,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131811615] [2024-06-21 15:51:56,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131811615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:56,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:56,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:56,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307310049] [2024-06-21 15:51:56,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:56,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:56,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:56,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 321 transitions, 4407 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) [2024-06-21 15:51:56,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:56,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:56,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:56,740 INFO L124 PetriNetUnfolderBase]: 2471/4165 cut-off events. [2024-06-21 15:51:56,740 INFO L125 PetriNetUnfolderBase]: For 376363/376363 co-relation queries the response was YES. [2024-06-21 15:51:56,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29189 conditions, 4165 events. 2471/4165 cut-off events. For 376363/376363 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26372 event pairs, 714 based on Foata normal form. 1/4150 useless extension candidates. Maximal degree in co-relation 29061. Up to 3307 conditions per place. [2024-06-21 15:51:56,785 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 150 changer transitions 0/354 dead transitions. [2024-06-21 15:51:56,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 354 transitions, 5859 flow [2024-06-21 15:51:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:51:56,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:51:56,786 INFO L175 Difference]: Start difference. First operand has 264 places, 321 transitions, 4407 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:51:56,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 354 transitions, 5859 flow [2024-06-21 15:51:57,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 354 transitions, 5740 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:57,642 INFO L231 Difference]: Finished difference. Result has 267 places, 331 transitions, 4852 flow [2024-06-21 15:51:57,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4852, PETRI_PLACES=267, PETRI_TRANSITIONS=331} [2024-06-21 15:51:57,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-21 15:51:57,642 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 331 transitions, 4852 flow [2024-06-21 15:51:57,643 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) [2024-06-21 15:51:57,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:57,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:57,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 15:51:57,643 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)] === [2024-06-21 15:51:57,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1174078500, now seen corresponding path program 6 times [2024-06-21 15:51:57,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:57,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143273826] [2024-06-21 15:51:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:57,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:57,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143273826] [2024-06-21 15:51:57,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143273826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:57,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:57,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:57,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136279400] [2024-06-21 15:51:57,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:57,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:57,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:57,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:57,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:57,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:57,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 331 transitions, 4852 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) [2024-06-21 15:51:57,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:57,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:57,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:58,329 INFO L124 PetriNetUnfolderBase]: 2476/4174 cut-off events. [2024-06-21 15:51:58,329 INFO L125 PetriNetUnfolderBase]: For 389232/389232 co-relation queries the response was YES. [2024-06-21 15:51:58,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29784 conditions, 4174 events. 2476/4174 cut-off events. For 389232/389232 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26401 event pairs, 714 based on Foata normal form. 1/4159 useless extension candidates. Maximal degree in co-relation 29655. Up to 3309 conditions per place. [2024-06-21 15:51:58,374 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 151 changer transitions 0/354 dead transitions. [2024-06-21 15:51:58,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 354 transitions, 6140 flow [2024-06-21 15:51:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:51:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:51:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 15:51:58,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 15:51:58,375 INFO L175 Difference]: Start difference. First operand has 267 places, 331 transitions, 4852 flow. Second operand 7 states and 176 transitions. [2024-06-21 15:51:58,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 354 transitions, 6140 flow [2024-06-21 15:51:59,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 354 transitions, 5949 flow, removed 78 selfloop flow, removed 2 redundant places. [2024-06-21 15:51:59,469 INFO L231 Difference]: Finished difference. Result has 272 places, 334 transitions, 5061 flow [2024-06-21 15:51:59,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5061, PETRI_PLACES=272, PETRI_TRANSITIONS=334} [2024-06-21 15:51:59,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-21 15:51:59,470 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 334 transitions, 5061 flow [2024-06-21 15:51:59,470 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) [2024-06-21 15:51:59,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:59,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:59,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 15:51:59,470 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)] === [2024-06-21 15:51:59,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash 836019214, now seen corresponding path program 7 times [2024-06-21 15:51:59,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:59,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934885506] [2024-06-21 15:51:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:59,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:59,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:59,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934885506] [2024-06-21 15:51:59,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934885506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:59,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:59,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:51:59,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27392153] [2024-06-21 15:51:59,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:59,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:51:59,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:59,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:51:59,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:51:59,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:51:59,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 334 transitions, 5061 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) [2024-06-21 15:51:59,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:59,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:51:59,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:00,196 INFO L124 PetriNetUnfolderBase]: 2494/4201 cut-off events. [2024-06-21 15:52:00,197 INFO L125 PetriNetUnfolderBase]: For 406207/406207 co-relation queries the response was YES. [2024-06-21 15:52:00,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30473 conditions, 4201 events. 2494/4201 cut-off events. For 406207/406207 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26549 event pairs, 713 based on Foata normal form. 2/4187 useless extension candidates. Maximal degree in co-relation 30342. Up to 3321 conditions per place. [2024-06-21 15:52:00,242 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 153 changer transitions 0/358 dead transitions. [2024-06-21 15:52:00,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 358 transitions, 6415 flow [2024-06-21 15:52:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 15:52:00,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 15:52:00,243 INFO L175 Difference]: Start difference. First operand has 272 places, 334 transitions, 5061 flow. Second operand 7 states and 174 transitions. [2024-06-21 15:52:00,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 358 transitions, 6415 flow [2024-06-21 15:52:01,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 358 transitions, 6150 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 15:52:01,174 INFO L231 Difference]: Finished difference. Result has 276 places, 341 transitions, 5263 flow [2024-06-21 15:52:01,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4802, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5263, PETRI_PLACES=276, PETRI_TRANSITIONS=341} [2024-06-21 15:52:01,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 15:52:01,175 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 341 transitions, 5263 flow [2024-06-21 15:52:01,175 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) [2024-06-21 15:52:01,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:01,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:01,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 15:52:01,175 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)] === [2024-06-21 15:52:01,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1973978012, now seen corresponding path program 8 times [2024-06-21 15:52:01,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:01,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408881906] [2024-06-21 15:52:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:01,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:01,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:01,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408881906] [2024-06-21 15:52:01,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408881906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:01,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:01,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:01,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089435279] [2024-06-21 15:52:01,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:01,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:01,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:01,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:01,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 341 transitions, 5263 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) [2024-06-21 15:52:01,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:01,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:01,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:01,934 INFO L124 PetriNetUnfolderBase]: 2512/4256 cut-off events. [2024-06-21 15:52:01,934 INFO L125 PetriNetUnfolderBase]: For 418789/418789 co-relation queries the response was YES. [2024-06-21 15:52:01,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30942 conditions, 4256 events. 2512/4256 cut-off events. For 418789/418789 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27058 event pairs, 645 based on Foata normal form. 2/4252 useless extension candidates. Maximal degree in co-relation 30810. Up to 3537 conditions per place. [2024-06-21 15:52:02,009 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 121 changer transitions 0/373 dead transitions. [2024-06-21 15:52:02,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 373 transitions, 6493 flow [2024-06-21 15:52:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 15:52:02,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-21 15:52:02,010 INFO L175 Difference]: Start difference. First operand has 276 places, 341 transitions, 5263 flow. Second operand 7 states and 184 transitions. [2024-06-21 15:52:02,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 373 transitions, 6493 flow [2024-06-21 15:52:02,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 373 transitions, 6170 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-21 15:52:02,993 INFO L231 Difference]: Finished difference. Result has 281 places, 347 transitions, 5376 flow [2024-06-21 15:52:02,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4952, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5376, PETRI_PLACES=281, PETRI_TRANSITIONS=347} [2024-06-21 15:52:02,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-21 15:52:02,994 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 347 transitions, 5376 flow [2024-06-21 15:52:02,994 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) [2024-06-21 15:52:02,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:02,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:02,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 15:52:02,995 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)] === [2024-06-21 15:52:02,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:02,995 INFO L85 PathProgramCache]: Analyzing trace with hash 515288210, now seen corresponding path program 9 times [2024-06-21 15:52:02,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:02,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783223358] [2024-06-21 15:52:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:02,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:03,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:03,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783223358] [2024-06-21 15:52:03,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783223358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:03,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:03,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:03,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752755581] [2024-06-21 15:52:03,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:03,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:03,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:03,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:03,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:03,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 347 transitions, 5376 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) [2024-06-21 15:52:03,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:03,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:03,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:03,842 INFO L124 PetriNetUnfolderBase]: 2506/4264 cut-off events. [2024-06-21 15:52:03,842 INFO L125 PetriNetUnfolderBase]: For 420866/420866 co-relation queries the response was YES. [2024-06-21 15:52:03,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30828 conditions, 4264 events. 2506/4264 cut-off events. For 420866/420866 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27175 event pairs, 629 based on Foata normal form. 2/4262 useless extension candidates. Maximal degree in co-relation 30694. Up to 3534 conditions per place. [2024-06-21 15:52:03,888 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 135 changer transitions 0/380 dead transitions. [2024-06-21 15:52:03,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 380 transitions, 6540 flow [2024-06-21 15:52:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:52:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:52:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 15:52:03,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524390243902439 [2024-06-21 15:52:03,889 INFO L175 Difference]: Start difference. First operand has 281 places, 347 transitions, 5376 flow. Second operand 8 states and 214 transitions. [2024-06-21 15:52:03,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 380 transitions, 6540 flow [2024-06-21 15:52:05,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 380 transitions, 6281 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 15:52:05,058 INFO L231 Difference]: Finished difference. Result has 284 places, 348 transitions, 5493 flow [2024-06-21 15:52:05,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=284, PETRI_TRANSITIONS=348} [2024-06-21 15:52:05,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 15:52:05,059 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 348 transitions, 5493 flow [2024-06-21 15:52:05,059 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) [2024-06-21 15:52:05,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:05,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:05,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 15:52:05,059 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)] === [2024-06-21 15:52:05,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:05,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1520682533, now seen corresponding path program 1 times [2024-06-21 15:52:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319143825] [2024-06-21 15:52:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:05,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:05,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:05,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319143825] [2024-06-21 15:52:05,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319143825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:05,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:05,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:05,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30749480] [2024-06-21 15:52:05,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:05,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:05,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:05,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 348 transitions, 5493 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) [2024-06-21 15:52:05,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:05,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:05,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:05,876 INFO L124 PetriNetUnfolderBase]: 2731/4650 cut-off events. [2024-06-21 15:52:05,876 INFO L125 PetriNetUnfolderBase]: For 571714/571720 co-relation queries the response was YES. [2024-06-21 15:52:05,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35788 conditions, 4650 events. 2731/4650 cut-off events. For 571714/571720 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30196 event pairs, 660 based on Foata normal form. 16/4659 useless extension candidates. Maximal degree in co-relation 35652. Up to 3426 conditions per place. [2024-06-21 15:52:05,931 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 279 selfloop transitions, 99 changer transitions 0/386 dead transitions. [2024-06-21 15:52:05,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 386 transitions, 6851 flow [2024-06-21 15:52:05,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:52:05,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:52:05,932 INFO L175 Difference]: Start difference. First operand has 284 places, 348 transitions, 5493 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:52:05,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 386 transitions, 6851 flow [2024-06-21 15:52:07,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 386 transitions, 6644 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 15:52:07,285 INFO L231 Difference]: Finished difference. Result has 287 places, 354 transitions, 5667 flow [2024-06-21 15:52:07,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5667, PETRI_PLACES=287, PETRI_TRANSITIONS=354} [2024-06-21 15:52:07,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-21 15:52:07,286 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 354 transitions, 5667 flow [2024-06-21 15:52:07,286 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) [2024-06-21 15:52:07,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:07,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:07,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 15:52:07,286 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)] === [2024-06-21 15:52:07,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:07,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1291119211, now seen corresponding path program 2 times [2024-06-21 15:52:07,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:07,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493106311] [2024-06-21 15:52:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:07,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:07,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493106311] [2024-06-21 15:52:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493106311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:07,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:07,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:07,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533753878] [2024-06-21 15:52:07,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:07,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:07,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:07,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:07,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:07,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:07,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 354 transitions, 5667 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) [2024-06-21 15:52:07,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:07,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:07,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:08,171 INFO L124 PetriNetUnfolderBase]: 2787/4731 cut-off events. [2024-06-21 15:52:08,171 INFO L125 PetriNetUnfolderBase]: For 588346/588352 co-relation queries the response was YES. [2024-06-21 15:52:08,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36759 conditions, 4731 events. 2787/4731 cut-off events. For 588346/588352 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30756 event pairs, 760 based on Foata normal form. 20/4744 useless extension candidates. Maximal degree in co-relation 36620. Up to 4027 conditions per place. [2024-06-21 15:52:08,224 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 271 selfloop transitions, 95 changer transitions 0/374 dead transitions. [2024-06-21 15:52:08,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 374 transitions, 6504 flow [2024-06-21 15:52:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 15:52:08,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 15:52:08,226 INFO L175 Difference]: Start difference. First operand has 287 places, 354 transitions, 5667 flow. Second operand 7 states and 170 transitions. [2024-06-21 15:52:08,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 374 transitions, 6504 flow [2024-06-21 15:52:09,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 374 transitions, 6363 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 15:52:09,438 INFO L231 Difference]: Finished difference. Result has 292 places, 356 transitions, 5775 flow [2024-06-21 15:52:09,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5775, PETRI_PLACES=292, PETRI_TRANSITIONS=356} [2024-06-21 15:52:09,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-21 15:52:09,439 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 356 transitions, 5775 flow [2024-06-21 15:52:09,439 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) [2024-06-21 15:52:09,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:09,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:09,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 15:52:09,439 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)] === [2024-06-21 15:52:09,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1290971341, now seen corresponding path program 3 times [2024-06-21 15:52:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:09,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379551070] [2024-06-21 15:52:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:09,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:09,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379551070] [2024-06-21 15:52:09,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379551070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:09,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:09,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:09,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461029890] [2024-06-21 15:52:09,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:09,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:09,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:09,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:09,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:09,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:09,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 356 transitions, 5775 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) [2024-06-21 15:52:09,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:09,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:09,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:10,297 INFO L124 PetriNetUnfolderBase]: 2893/4903 cut-off events. [2024-06-21 15:52:10,297 INFO L125 PetriNetUnfolderBase]: For 626159/626165 co-relation queries the response was YES. [2024-06-21 15:52:10,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38988 conditions, 4903 events. 2893/4903 cut-off events. For 626159/626165 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32089 event pairs, 769 based on Foata normal form. 16/4912 useless extension candidates. Maximal degree in co-relation 38847. Up to 4035 conditions per place. [2024-06-21 15:52:10,360 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 280 selfloop transitions, 94 changer transitions 0/382 dead transitions. [2024-06-21 15:52:10,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 382 transitions, 6855 flow [2024-06-21 15:52:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:52:10,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:52:10,361 INFO L175 Difference]: Start difference. First operand has 292 places, 356 transitions, 5775 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:52:10,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 382 transitions, 6855 flow [2024-06-21 15:52:12,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 382 transitions, 6631 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 15:52:12,041 INFO L231 Difference]: Finished difference. Result has 295 places, 360 transitions, 5859 flow [2024-06-21 15:52:12,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5551, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5859, PETRI_PLACES=295, PETRI_TRANSITIONS=360} [2024-06-21 15:52:12,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-21 15:52:12,042 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 360 transitions, 5859 flow [2024-06-21 15:52:12,042 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) [2024-06-21 15:52:12,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:12,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:12,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 15:52:12,042 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)] === [2024-06-21 15:52:12,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2089090633, now seen corresponding path program 4 times [2024-06-21 15:52:12,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:12,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012022651] [2024-06-21 15:52:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:12,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:12,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:12,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012022651] [2024-06-21 15:52:12,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012022651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:12,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:12,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:52:12,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128871536] [2024-06-21 15:52:12,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:12,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:52:12,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:12,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:52:12,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:52:12,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:12,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 360 transitions, 5859 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) [2024-06-21 15:52:12,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:12,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:12,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:13,100 INFO L124 PetriNetUnfolderBase]: 2949/4983 cut-off events. [2024-06-21 15:52:13,100 INFO L125 PetriNetUnfolderBase]: For 657021/657021 co-relation queries the response was YES. [2024-06-21 15:52:13,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39752 conditions, 4983 events. 2949/4983 cut-off events. For 657021/657021 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32707 event pairs, 792 based on Foata normal form. 16/4991 useless extension candidates. Maximal degree in co-relation 39609. Up to 4281 conditions per place. [2024-06-21 15:52:13,169 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 267 selfloop transitions, 108 changer transitions 0/383 dead transitions. [2024-06-21 15:52:13,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 383 transitions, 6728 flow [2024-06-21 15:52:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:52:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:52:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 15:52:13,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-21 15:52:13,170 INFO L175 Difference]: Start difference. First operand has 295 places, 360 transitions, 5859 flow. Second operand 10 states and 231 transitions. [2024-06-21 15:52:13,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 383 transitions, 6728 flow [2024-06-21 15:52:14,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 383 transitions, 6573 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 15:52:14,914 INFO L231 Difference]: Finished difference. Result has 302 places, 362 transitions, 5987 flow [2024-06-21 15:52:14,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5704, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5987, PETRI_PLACES=302, PETRI_TRANSITIONS=362} [2024-06-21 15:52:14,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-21 15:52:14,915 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 362 transitions, 5987 flow [2024-06-21 15:52:14,915 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) [2024-06-21 15:52:14,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:14,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:14,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 15:52:14,915 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)] === [2024-06-21 15:52:14,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash 844755913, now seen corresponding path program 5 times [2024-06-21 15:52:14,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:14,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683817796] [2024-06-21 15:52:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:14,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:14,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:14,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683817796] [2024-06-21 15:52:14,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683817796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:14,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:14,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:52:14,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662134967] [2024-06-21 15:52:14,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:14,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:52:15,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:15,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:52:15,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:52:15,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:15,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 362 transitions, 5987 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) [2024-06-21 15:52:15,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:15,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:15,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:15,833 INFO L124 PetriNetUnfolderBase]: 2992/5068 cut-off events. [2024-06-21 15:52:15,833 INFO L125 PetriNetUnfolderBase]: For 664710/664710 co-relation queries the response was YES. [2024-06-21 15:52:15,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40377 conditions, 5068 events. 2992/5068 cut-off events. For 664710/664710 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 33442 event pairs, 813 based on Foata normal form. 16/5076 useless extension candidates. Maximal degree in co-relation 40232. Up to 4350 conditions per place. [2024-06-21 15:52:15,893 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 102 changer transitions 0/383 dead transitions. [2024-06-21 15:52:15,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 383 transitions, 6856 flow [2024-06-21 15:52:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:52:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:52:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 15:52:15,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 15:52:15,894 INFO L175 Difference]: Start difference. First operand has 302 places, 362 transitions, 5987 flow. Second operand 8 states and 191 transitions. [2024-06-21 15:52:15,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 383 transitions, 6856 flow [2024-06-21 15:52:17,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 383 transitions, 6598 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 15:52:17,594 INFO L231 Difference]: Finished difference. Result has 302 places, 364 transitions, 6004 flow [2024-06-21 15:52:17,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5729, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6004, PETRI_PLACES=302, PETRI_TRANSITIONS=364} [2024-06-21 15:52:17,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-21 15:52:17,595 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 364 transitions, 6004 flow [2024-06-21 15:52:17,595 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) [2024-06-21 15:52:17,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:17,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:17,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 15:52:17,595 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)] === [2024-06-21 15:52:17,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash 844608043, now seen corresponding path program 6 times [2024-06-21 15:52:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:17,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660373605] [2024-06-21 15:52:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:17,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:17,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:17,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660373605] [2024-06-21 15:52:17,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660373605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:17,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:17,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:52:17,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169429069] [2024-06-21 15:52:17,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:17,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:52:17,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:17,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:52:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:52:17,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:17,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 364 transitions, 6004 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) [2024-06-21 15:52:17,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:17,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:17,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:18,584 INFO L124 PetriNetUnfolderBase]: 3098/5236 cut-off events. [2024-06-21 15:52:18,584 INFO L125 PetriNetUnfolderBase]: For 704314/704314 co-relation queries the response was YES. [2024-06-21 15:52:18,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42468 conditions, 5236 events. 3098/5236 cut-off events. For 704314/704314 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34778 event pairs, 818 based on Foata normal form. 12/5240 useless extension candidates. Maximal degree in co-relation 42322. Up to 4272 conditions per place. [2024-06-21 15:52:18,649 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 282 selfloop transitions, 101 changer transitions 0/391 dead transitions. [2024-06-21 15:52:18,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 391 transitions, 7130 flow [2024-06-21 15:52:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:52:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:52:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 15:52:18,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 15:52:18,650 INFO L175 Difference]: Start difference. First operand has 302 places, 364 transitions, 6004 flow. Second operand 8 states and 194 transitions. [2024-06-21 15:52:18,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 391 transitions, 7130 flow [2024-06-21 15:52:20,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 391 transitions, 6909 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 15:52:20,423 INFO L231 Difference]: Finished difference. Result has 306 places, 368 transitions, 6130 flow [2024-06-21 15:52:20,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6130, PETRI_PLACES=306, PETRI_TRANSITIONS=368} [2024-06-21 15:52:20,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 15:52:20,424 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 368 transitions, 6130 flow [2024-06-21 15:52:20,424 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) [2024-06-21 15:52:20,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:20,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:20,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 15:52:20,424 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)] === [2024-06-21 15:52:20,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 850333495, now seen corresponding path program 1 times [2024-06-21 15:52:20,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:20,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819248573] [2024-06-21 15:52:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:20,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:20,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:20,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819248573] [2024-06-21 15:52:20,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819248573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:20,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:20,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:52:20,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970848495] [2024-06-21 15:52:20,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:20,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:52:20,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:20,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:52:20,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:52:20,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:20,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 368 transitions, 6130 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) [2024-06-21 15:52:20,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:20,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:20,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:21,444 INFO L124 PetriNetUnfolderBase]: 3105/5253 cut-off events. [2024-06-21 15:52:21,444 INFO L125 PetriNetUnfolderBase]: For 695344/695344 co-relation queries the response was YES. [2024-06-21 15:52:21,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42058 conditions, 5253 events. 3105/5253 cut-off events. For 695344/695344 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34963 event pairs, 822 based on Foata normal form. 12/5257 useless extension candidates. Maximal degree in co-relation 41910. Up to 4405 conditions per place. [2024-06-21 15:52:21,510 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 271 selfloop transitions, 115 changer transitions 0/394 dead transitions. [2024-06-21 15:52:21,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 394 transitions, 7032 flow [2024-06-21 15:52:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:52:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:52:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-21 15:52:21,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5682926829268292 [2024-06-21 15:52:21,511 INFO L175 Difference]: Start difference. First operand has 306 places, 368 transitions, 6130 flow. Second operand 10 states and 233 transitions. [2024-06-21 15:52:21,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 394 transitions, 7032 flow [2024-06-21 15:52:23,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 394 transitions, 6901 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 15:52:23,333 INFO L231 Difference]: Finished difference. Result has 313 places, 370 transitions, 6296 flow [2024-06-21 15:52:23,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5999, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6296, PETRI_PLACES=313, PETRI_TRANSITIONS=370} [2024-06-21 15:52:23,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-21 15:52:23,334 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 370 transitions, 6296 flow [2024-06-21 15:52:23,335 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) [2024-06-21 15:52:23,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:23,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:23,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 15:52:23,335 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)] === [2024-06-21 15:52:23,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1982714711, now seen corresponding path program 7 times [2024-06-21 15:52:23,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:23,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799886488] [2024-06-21 15:52:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:23,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:23,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:23,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799886488] [2024-06-21 15:52:23,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799886488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:23,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:23,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:23,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972738848] [2024-06-21 15:52:23,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:23,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:23,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:23,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:23,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:23,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:23,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 370 transitions, 6296 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) [2024-06-21 15:52:23,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:23,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:23,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:24,374 INFO L124 PetriNetUnfolderBase]: 3237/5483 cut-off events. [2024-06-21 15:52:24,374 INFO L125 PetriNetUnfolderBase]: For 820619/820619 co-relation queries the response was YES. [2024-06-21 15:52:24,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43245 conditions, 5483 events. 3237/5483 cut-off events. For 820619/820619 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36862 event pairs, 870 based on Foata normal form. 42/5519 useless extension candidates. Maximal degree in co-relation 43094. Up to 4615 conditions per place. [2024-06-21 15:52:24,443 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 94 changer transitions 7/395 dead transitions. [2024-06-21 15:52:24,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 395 transitions, 7191 flow [2024-06-21 15:52:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:52:24,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:52:24,444 INFO L175 Difference]: Start difference. First operand has 313 places, 370 transitions, 6296 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:52:24,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 395 transitions, 7191 flow [2024-06-21 15:52:26,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 395 transitions, 6910 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 15:52:26,447 INFO L231 Difference]: Finished difference. Result has 312 places, 367 transitions, 6161 flow [2024-06-21 15:52:26,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6161, PETRI_PLACES=312, PETRI_TRANSITIONS=367} [2024-06-21 15:52:26,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 15:52:26,447 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 367 transitions, 6161 flow [2024-06-21 15:52:26,448 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) [2024-06-21 15:52:26,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:26,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:26,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 15:52:26,448 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)] === [2024-06-21 15:52:26,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1988077091, now seen corresponding path program 8 times [2024-06-21 15:52:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:26,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786397249] [2024-06-21 15:52:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:26,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:26,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786397249] [2024-06-21 15:52:26,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786397249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:26,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:26,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:26,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512815418] [2024-06-21 15:52:26,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:26,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:26,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:26,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:26,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:26,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:26,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 367 transitions, 6161 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) [2024-06-21 15:52:26,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:26,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:26,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:27,649 INFO L124 PetriNetUnfolderBase]: 3179/5387 cut-off events. [2024-06-21 15:52:27,650 INFO L125 PetriNetUnfolderBase]: For 767700/767700 co-relation queries the response was YES. [2024-06-21 15:52:27,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40973 conditions, 5387 events. 3179/5387 cut-off events. For 767700/767700 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 36022 event pairs, 840 based on Foata normal form. 42/5423 useless extension candidates. Maximal degree in co-relation 40821. Up to 4538 conditions per place. [2024-06-21 15:52:27,721 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 94 changer transitions 7/389 dead transitions. [2024-06-21 15:52:27,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 389 transitions, 7018 flow [2024-06-21 15:52:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:52:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:52:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 15:52:27,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 15:52:27,722 INFO L175 Difference]: Start difference. First operand has 312 places, 367 transitions, 6161 flow. Second operand 8 states and 197 transitions. [2024-06-21 15:52:27,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 389 transitions, 7018 flow [2024-06-21 15:52:29,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 389 transitions, 6808 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 15:52:29,750 INFO L231 Difference]: Finished difference. Result has 315 places, 363 transitions, 6092 flow [2024-06-21 15:52:29,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5951, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6092, PETRI_PLACES=315, PETRI_TRANSITIONS=363} [2024-06-21 15:52:29,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 15:52:29,751 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 363 transitions, 6092 flow [2024-06-21 15:52:29,751 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) [2024-06-21 15:52:29,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:29,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:29,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 15:52:29,751 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)] === [2024-06-21 15:52:29,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:29,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1982566841, now seen corresponding path program 9 times [2024-06-21 15:52:29,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:29,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995071337] [2024-06-21 15:52:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:29,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:29,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:29,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995071337] [2024-06-21 15:52:29,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995071337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:29,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:29,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:29,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314943518] [2024-06-21 15:52:29,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:29,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:29,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:29,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:29,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:29,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:29,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 363 transitions, 6092 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) [2024-06-21 15:52:29,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:29,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:29,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:30,768 INFO L124 PetriNetUnfolderBase]: 3176/5421 cut-off events. [2024-06-21 15:52:30,768 INFO L125 PetriNetUnfolderBase]: For 739126/739126 co-relation queries the response was YES. [2024-06-21 15:52:30,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40545 conditions, 5421 events. 3176/5421 cut-off events. For 739126/739126 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 36594 event pairs, 704 based on Foata normal form. 36/5451 useless extension candidates. Maximal degree in co-relation 40392. Up to 3981 conditions per place. [2024-06-21 15:52:30,834 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 91 changer transitions 10/398 dead transitions. [2024-06-21 15:52:30,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 398 transitions, 7227 flow [2024-06-21 15:52:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 15:52:30,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-21 15:52:30,835 INFO L175 Difference]: Start difference. First operand has 315 places, 363 transitions, 6092 flow. Second operand 7 states and 188 transitions. [2024-06-21 15:52:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 398 transitions, 7227 flow [2024-06-21 15:52:33,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 398 transitions, 6897 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 15:52:33,103 INFO L231 Difference]: Finished difference. Result has 315 places, 358 transitions, 5855 flow [2024-06-21 15:52:33,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5762, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5855, PETRI_PLACES=315, PETRI_TRANSITIONS=358} [2024-06-21 15:52:33,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 15:52:33,104 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 358 transitions, 5855 flow [2024-06-21 15:52:33,104 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) [2024-06-21 15:52:33,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:33,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:33,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 15:52:33,105 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)] === [2024-06-21 15:52:33,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1377035033, now seen corresponding path program 2 times [2024-06-21 15:52:33,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:33,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881583476] [2024-06-21 15:52:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:33,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:33,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:33,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881583476] [2024-06-21 15:52:33,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881583476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:33,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:33,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:33,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994710021] [2024-06-21 15:52:33,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:33,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:33,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:33,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:33,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:33,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:33,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 358 transitions, 5855 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) [2024-06-21 15:52:33,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:33,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:33,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:34,060 INFO L124 PetriNetUnfolderBase]: 2925/4987 cut-off events. [2024-06-21 15:52:34,061 INFO L125 PetriNetUnfolderBase]: For 607598/607598 co-relation queries the response was YES. [2024-06-21 15:52:34,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35706 conditions, 4987 events. 2925/4987 cut-off events. For 607598/607598 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33179 event pairs, 635 based on Foata normal form. 36/5017 useless extension candidates. Maximal degree in co-relation 35551. Up to 3800 conditions per place. [2024-06-21 15:52:34,123 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 269 selfloop transitions, 92 changer transitions 17/386 dead transitions. [2024-06-21 15:52:34,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 386 transitions, 6740 flow [2024-06-21 15:52:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:52:34,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:52:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 15:52:34,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 15:52:34,124 INFO L175 Difference]: Start difference. First operand has 315 places, 358 transitions, 5855 flow. Second operand 8 states and 202 transitions. [2024-06-21 15:52:34,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 386 transitions, 6740 flow [2024-06-21 15:52:36,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 386 transitions, 6254 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-21 15:52:36,159 INFO L231 Difference]: Finished difference. Result has 314 places, 347 transitions, 5390 flow [2024-06-21 15:52:36,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5377, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5390, PETRI_PLACES=314, PETRI_TRANSITIONS=347} [2024-06-21 15:52:36,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 15:52:36,160 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 347 transitions, 5390 flow [2024-06-21 15:52:36,160 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) [2024-06-21 15:52:36,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:36,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:36,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 15:52:36,161 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)] === [2024-06-21 15:52:36,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash -804980111, now seen corresponding path program 1 times [2024-06-21 15:52:36,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:36,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576836504] [2024-06-21 15:52:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:36,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:36,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:36,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576836504] [2024-06-21 15:52:36,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576836504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:36,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:36,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:36,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921662608] [2024-06-21 15:52:36,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:36,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:36,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:36,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:36,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:36,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:36,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 347 transitions, 5390 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) [2024-06-21 15:52:36,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:36,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:36,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:37,000 INFO L124 PetriNetUnfolderBase]: 2729/4666 cut-off events. [2024-06-21 15:52:37,000 INFO L125 PetriNetUnfolderBase]: For 469949/469949 co-relation queries the response was YES. [2024-06-21 15:52:37,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33214 conditions, 4666 events. 2729/4666 cut-off events. For 469949/469949 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30667 event pairs, 621 based on Foata normal form. 1/4664 useless extension candidates. Maximal degree in co-relation 33061. Up to 4180 conditions per place. [2024-06-21 15:52:37,064 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 335 selfloop transitions, 38 changer transitions 0/381 dead transitions. [2024-06-21 15:52:37,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 381 transitions, 6441 flow [2024-06-21 15:52:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:52:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:52:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 15:52:37,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 15:52:37,065 INFO L175 Difference]: Start difference. First operand has 314 places, 347 transitions, 5390 flow. Second operand 8 states and 198 transitions. [2024-06-21 15:52:37,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 381 transitions, 6441 flow [2024-06-21 15:52:38,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 381 transitions, 6049 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 15:52:38,795 INFO L231 Difference]: Finished difference. Result has 312 places, 350 transitions, 5129 flow [2024-06-21 15:52:38,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5129, PETRI_PLACES=312, PETRI_TRANSITIONS=350} [2024-06-21 15:52:38,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 15:52:38,795 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 350 transitions, 5129 flow [2024-06-21 15:52:38,796 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) [2024-06-21 15:52:38,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:38,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:38,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 15:52:38,796 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)] === [2024-06-21 15:52:38,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash -814836179, now seen corresponding path program 1 times [2024-06-21 15:52:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:38,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746143100] [2024-06-21 15:52:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:38,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:38,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746143100] [2024-06-21 15:52:38,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746143100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:38,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:38,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:38,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495852310] [2024-06-21 15:52:38,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:38,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:38,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:38,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:38,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 350 transitions, 5129 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) [2024-06-21 15:52:38,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:38,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:38,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:39,723 INFO L124 PetriNetUnfolderBase]: 2742/4675 cut-off events. [2024-06-21 15:52:39,724 INFO L125 PetriNetUnfolderBase]: For 471806/471806 co-relation queries the response was YES. [2024-06-21 15:52:39,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32987 conditions, 4675 events. 2742/4675 cut-off events. For 471806/471806 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30820 event pairs, 633 based on Foata normal form. 1/4670 useless extension candidates. Maximal degree in co-relation 32835. Up to 3956 conditions per place. [2024-06-21 15:52:39,781 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 122 changer transitions 0/374 dead transitions. [2024-06-21 15:52:39,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 374 transitions, 6199 flow [2024-06-21 15:52:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:52:39,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:52:39,782 INFO L175 Difference]: Start difference. First operand has 312 places, 350 transitions, 5129 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:52:39,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 374 transitions, 6199 flow [2024-06-21 15:52:41,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 374 transitions, 6103 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 15:52:41,610 INFO L231 Difference]: Finished difference. Result has 314 places, 356 transitions, 5491 flow [2024-06-21 15:52:41,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5033, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5491, PETRI_PLACES=314, PETRI_TRANSITIONS=356} [2024-06-21 15:52:41,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 15:52:41,611 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 356 transitions, 5491 flow [2024-06-21 15:52:41,611 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) [2024-06-21 15:52:41,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:41,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:41,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 15:52:41,611 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)] === [2024-06-21 15:52:41,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:41,612 INFO L85 PathProgramCache]: Analyzing trace with hash -804860141, now seen corresponding path program 2 times [2024-06-21 15:52:41,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:41,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982108586] [2024-06-21 15:52:41,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:41,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:41,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:41,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982108586] [2024-06-21 15:52:41,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982108586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:41,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:41,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:52:41,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230959441] [2024-06-21 15:52:41,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:41,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:52:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:52:41,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:52:41,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:41,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 356 transitions, 5491 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) [2024-06-21 15:52:41,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:41,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:41,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:42,593 INFO L124 PetriNetUnfolderBase]: 2739/4680 cut-off events. [2024-06-21 15:52:42,594 INFO L125 PetriNetUnfolderBase]: For 478569/478569 co-relation queries the response was YES. [2024-06-21 15:52:42,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33424 conditions, 4680 events. 2739/4680 cut-off events. For 478569/478569 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30838 event pairs, 615 based on Foata normal form. 1/4678 useless extension candidates. Maximal degree in co-relation 33270. Up to 4195 conditions per place. [2024-06-21 15:52:42,652 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 341 selfloop transitions, 38 changer transitions 0/387 dead transitions. [2024-06-21 15:52:42,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 387 transitions, 6327 flow [2024-06-21 15:52:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:52:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:52:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 15:52:42,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-21 15:52:42,654 INFO L175 Difference]: Start difference. First operand has 314 places, 356 transitions, 5491 flow. Second operand 9 states and 215 transitions. [2024-06-21 15:52:42,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 387 transitions, 6327 flow [2024-06-21 15:52:44,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 387 transitions, 6107 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 15:52:44,197 INFO L231 Difference]: Finished difference. Result has 318 places, 356 transitions, 5353 flow [2024-06-21 15:52:44,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5353, PETRI_PLACES=318, PETRI_TRANSITIONS=356} [2024-06-21 15:52:44,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 15:52:44,198 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 356 transitions, 5353 flow [2024-06-21 15:52:44,198 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) [2024-06-21 15:52:44,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:44,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:44,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 15:52:44,198 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)] === [2024-06-21 15:52:44,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:44,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1348690093, now seen corresponding path program 3 times [2024-06-21 15:52:44,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:44,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886211083] [2024-06-21 15:52:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:44,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:44,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886211083] [2024-06-21 15:52:44,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886211083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:44,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:44,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:44,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23242835] [2024-06-21 15:52:44,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:44,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:44,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:44,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:44,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 356 transitions, 5353 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) [2024-06-21 15:52:44,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:44,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:44,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:45,069 INFO L124 PetriNetUnfolderBase]: 2816/4793 cut-off events. [2024-06-21 15:52:45,069 INFO L125 PetriNetUnfolderBase]: For 518960/518960 co-relation queries the response was YES. [2024-06-21 15:52:45,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35022 conditions, 4793 events. 2816/4793 cut-off events. For 518960/518960 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31604 event pairs, 647 based on Foata normal form. 1/4779 useless extension candidates. Maximal degree in co-relation 34868. Up to 3812 conditions per place. [2024-06-21 15:52:45,132 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 200 selfloop transitions, 197 changer transitions 0/405 dead transitions. [2024-06-21 15:52:45,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 405 transitions, 7388 flow [2024-06-21 15:52:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 15:52:45,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-21 15:52:45,134 INFO L175 Difference]: Start difference. First operand has 318 places, 356 transitions, 5353 flow. Second operand 7 states and 186 transitions. [2024-06-21 15:52:45,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 405 transitions, 7388 flow [2024-06-21 15:52:46,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 405 transitions, 7300 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 15:52:46,980 INFO L231 Difference]: Finished difference. Result has 318 places, 378 transitions, 6112 flow [2024-06-21 15:52:46,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6112, PETRI_PLACES=318, PETRI_TRANSITIONS=378} [2024-06-21 15:52:46,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 15:52:46,981 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 378 transitions, 6112 flow [2024-06-21 15:52:46,982 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) [2024-06-21 15:52:46,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:46,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:46,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 15:52:46,982 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)] === [2024-06-21 15:52:46,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1338214573, now seen corresponding path program 4 times [2024-06-21 15:52:46,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:46,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345724859] [2024-06-21 15:52:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:46,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:47,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:47,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345724859] [2024-06-21 15:52:47,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345724859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:47,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:47,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:47,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38764571] [2024-06-21 15:52:47,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:47,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:47,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:47,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:47,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 378 transitions, 6112 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) [2024-06-21 15:52:47,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:47,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:47,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:47,990 INFO L124 PetriNetUnfolderBase]: 2829/4815 cut-off events. [2024-06-21 15:52:47,990 INFO L125 PetriNetUnfolderBase]: For 537231/537231 co-relation queries the response was YES. [2024-06-21 15:52:48,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35921 conditions, 4815 events. 2829/4815 cut-off events. For 537231/537231 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 31818 event pairs, 647 based on Foata normal form. 1/4801 useless extension candidates. Maximal degree in co-relation 35766. Up to 3822 conditions per place. [2024-06-21 15:52:48,049 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 201 changer transitions 0/408 dead transitions. [2024-06-21 15:52:48,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 408 transitions, 7850 flow [2024-06-21 15:52:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 15:52:48,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 15:52:48,050 INFO L175 Difference]: Start difference. First operand has 318 places, 378 transitions, 6112 flow. Second operand 7 states and 182 transitions. [2024-06-21 15:52:48,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 408 transitions, 7850 flow [2024-06-21 15:52:49,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 408 transitions, 7455 flow, removed 93 selfloop flow, removed 2 redundant places. [2024-06-21 15:52:49,934 INFO L231 Difference]: Finished difference. Result has 323 places, 384 transitions, 6269 flow [2024-06-21 15:52:49,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6269, PETRI_PLACES=323, PETRI_TRANSITIONS=384} [2024-06-21 15:52:49,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-21 15:52:49,935 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 384 transitions, 6269 flow [2024-06-21 15:52:49,935 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) [2024-06-21 15:52:49,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:49,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:49,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 15:52:49,935 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)] === [2024-06-21 15:52:49,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1547991883, now seen corresponding path program 5 times [2024-06-21 15:52:49,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:49,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055685399] [2024-06-21 15:52:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:49,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:50,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:50,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055685399] [2024-06-21 15:52:50,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055685399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:50,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:50,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:52:50,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472853564] [2024-06-21 15:52:50,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:50,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:52:50,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:50,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:52:50,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:52:50,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:50,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 384 transitions, 6269 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) [2024-06-21 15:52:50,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:50,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:50,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:50,886 INFO L124 PetriNetUnfolderBase]: 2858/4861 cut-off events. [2024-06-21 15:52:50,887 INFO L125 PetriNetUnfolderBase]: For 562743/562743 co-relation queries the response was YES. [2024-06-21 15:52:50,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36568 conditions, 4861 events. 2858/4861 cut-off events. For 562743/562743 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32149 event pairs, 647 based on Foata normal form. 1/4847 useless extension candidates. Maximal degree in co-relation 36412. Up to 3847 conditions per place. [2024-06-21 15:52:50,956 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 209 selfloop transitions, 207 changer transitions 0/424 dead transitions. [2024-06-21 15:52:50,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 424 transitions, 7970 flow [2024-06-21 15:52:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:52:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:52:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 15:52:50,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-21 15:52:50,957 INFO L175 Difference]: Start difference. First operand has 323 places, 384 transitions, 6269 flow. Second operand 8 states and 209 transitions. [2024-06-21 15:52:50,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 424 transitions, 7970 flow [2024-06-21 15:52:52,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 424 transitions, 7568 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 15:52:52,875 INFO L231 Difference]: Finished difference. Result has 328 places, 394 transitions, 6524 flow [2024-06-21 15:52:52,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5907, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6524, PETRI_PLACES=328, PETRI_TRANSITIONS=394} [2024-06-21 15:52:52,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-21 15:52:52,876 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 394 transitions, 6524 flow [2024-06-21 15:52:52,876 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) [2024-06-21 15:52:52,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:52,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:52,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 15:52:52,876 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)] === [2024-06-21 15:52:52,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash 71949953, now seen corresponding path program 2 times [2024-06-21 15:52:52,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:52,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013949660] [2024-06-21 15:52:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:52,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:52,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:52,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013949660] [2024-06-21 15:52:52,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013949660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:52,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:52,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:52,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990879494] [2024-06-21 15:52:52,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:52,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:52,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:52,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:52,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:52,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:52,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 394 transitions, 6524 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) [2024-06-21 15:52:52,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:52,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:52,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:53,821 INFO L124 PetriNetUnfolderBase]: 2863/4843 cut-off events. [2024-06-21 15:52:53,822 INFO L125 PetriNetUnfolderBase]: For 577161/577161 co-relation queries the response was YES. [2024-06-21 15:52:53,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36724 conditions, 4843 events. 2863/4843 cut-off events. For 577161/577161 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 31905 event pairs, 718 based on Foata normal form. 1/4828 useless extension candidates. Maximal degree in co-relation 36567. Up to 3851 conditions per place. [2024-06-21 15:52:53,880 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 228 selfloop transitions, 180 changer transitions 0/416 dead transitions. [2024-06-21 15:52:53,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 416 transitions, 7840 flow [2024-06-21 15:52:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:52:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:52:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:52:53,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:52:53,881 INFO L175 Difference]: Start difference. First operand has 328 places, 394 transitions, 6524 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:52:53,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 416 transitions, 7840 flow [2024-06-21 15:52:56,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 416 transitions, 7346 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 15:52:56,246 INFO L231 Difference]: Finished difference. Result has 330 places, 397 transitions, 6475 flow [2024-06-21 15:52:56,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6034, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6475, PETRI_PLACES=330, PETRI_TRANSITIONS=397} [2024-06-21 15:52:56,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-21 15:52:56,247 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 397 transitions, 6475 flow [2024-06-21 15:52:56,247 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) [2024-06-21 15:52:56,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:56,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:56,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 15:52:56,247 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)] === [2024-06-21 15:52:56,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:56,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1261062725, now seen corresponding path program 6 times [2024-06-21 15:52:56,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:56,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019144846] [2024-06-21 15:52:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:56,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:56,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019144846] [2024-06-21 15:52:56,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019144846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:56,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:56,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:52:56,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528003979] [2024-06-21 15:52:56,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:56,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:52:56,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:52:56,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:52:56,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:56,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 397 transitions, 6475 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) [2024-06-21 15:52:56,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:56,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:56,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:57,204 INFO L124 PetriNetUnfolderBase]: 2868/4875 cut-off events. [2024-06-21 15:52:57,204 INFO L125 PetriNetUnfolderBase]: For 585759/585759 co-relation queries the response was YES. [2024-06-21 15:52:57,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36753 conditions, 4875 events. 2868/4875 cut-off events. For 585759/585759 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32196 event pairs, 646 based on Foata normal form. 1/4861 useless extension candidates. Maximal degree in co-relation 36595. Up to 3855 conditions per place. [2024-06-21 15:52:57,269 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 212 changer transitions 0/426 dead transitions. [2024-06-21 15:52:57,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 426 transitions, 7803 flow [2024-06-21 15:52:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:52:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:52:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 15:52:57,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 15:52:57,270 INFO L175 Difference]: Start difference. First operand has 330 places, 397 transitions, 6475 flow. Second operand 8 states and 203 transitions. [2024-06-21 15:52:57,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 426 transitions, 7803 flow [2024-06-21 15:52:59,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 426 transitions, 7412 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 15:52:59,676 INFO L231 Difference]: Finished difference. Result has 334 places, 400 transitions, 6562 flow [2024-06-21 15:52:59,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6562, PETRI_PLACES=334, PETRI_TRANSITIONS=400} [2024-06-21 15:52:59,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-21 15:52:59,677 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 400 transitions, 6562 flow [2024-06-21 15:52:59,677 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) [2024-06-21 15:52:59,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:59,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:59,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 15:52:59,678 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)] === [2024-06-21 15:52:59,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:59,678 INFO L85 PathProgramCache]: Analyzing trace with hash 220466291, now seen corresponding path program 3 times [2024-06-21 15:52:59,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:59,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440422145] [2024-06-21 15:52:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:59,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:59,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:59,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440422145] [2024-06-21 15:52:59,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440422145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:59,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:59,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:52:59,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105327672] [2024-06-21 15:52:59,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:59,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:52:59,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:59,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:52:59,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:52:59,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:52:59,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 400 transitions, 6562 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) [2024-06-21 15:52:59,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:59,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:52:59,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:00,708 INFO L124 PetriNetUnfolderBase]: 2873/4860 cut-off events. [2024-06-21 15:53:00,708 INFO L125 PetriNetUnfolderBase]: For 599376/599376 co-relation queries the response was YES. [2024-06-21 15:53:00,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36934 conditions, 4860 events. 2873/4860 cut-off events. For 599376/599376 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32098 event pairs, 719 based on Foata normal form. 1/4845 useless extension candidates. Maximal degree in co-relation 36775. Up to 3859 conditions per place. [2024-06-21 15:53:00,774 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 188 changer transitions 0/420 dead transitions. [2024-06-21 15:53:00,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 420 transitions, 8075 flow [2024-06-21 15:53:00,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:53:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:53:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 15:53:00,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 15:53:00,775 INFO L175 Difference]: Start difference. First operand has 334 places, 400 transitions, 6562 flow. Second operand 7 states and 174 transitions. [2024-06-21 15:53:00,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 420 transitions, 8075 flow [2024-06-21 15:53:03,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 420 transitions, 7777 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 15:53:03,292 INFO L231 Difference]: Finished difference. Result has 336 places, 403 transitions, 6719 flow [2024-06-21 15:53:03,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6268, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6719, PETRI_PLACES=336, PETRI_TRANSITIONS=403} [2024-06-21 15:53:03,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-21 15:53:03,293 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 403 transitions, 6719 flow [2024-06-21 15:53:03,293 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) [2024-06-21 15:53:03,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:03,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:03,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 15:53:03,293 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)] === [2024-06-21 15:53:03,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:03,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1817601259, now seen corresponding path program 7 times [2024-06-21 15:53:03,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:03,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968490015] [2024-06-21 15:53:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:03,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:03,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:03,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968490015] [2024-06-21 15:53:03,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968490015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:03,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:03,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:53:03,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329646487] [2024-06-21 15:53:03,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:03,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:53:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:03,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:53:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:53:03,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:03,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 403 transitions, 6719 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) [2024-06-21 15:53:03,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:03,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:03,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:04,252 INFO L124 PetriNetUnfolderBase]: 2878/4888 cut-off events. [2024-06-21 15:53:04,252 INFO L125 PetriNetUnfolderBase]: For 611976/611976 co-relation queries the response was YES. [2024-06-21 15:53:04,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37142 conditions, 4888 events. 2878/4888 cut-off events. For 611976/611976 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32273 event pairs, 645 based on Foata normal form. 1/4873 useless extension candidates. Maximal degree in co-relation 36982. Up to 3863 conditions per place. [2024-06-21 15:53:04,327 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 216 changer transitions 0/430 dead transitions. [2024-06-21 15:53:04,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 430 transitions, 8254 flow [2024-06-21 15:53:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:53:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:53:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 15:53:04,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 15:53:04,328 INFO L175 Difference]: Start difference. First operand has 336 places, 403 transitions, 6719 flow. Second operand 8 states and 201 transitions. [2024-06-21 15:53:04,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 430 transitions, 8254 flow [2024-06-21 15:53:06,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 430 transitions, 7682 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 15:53:06,786 INFO L231 Difference]: Finished difference. Result has 337 places, 406 transitions, 6636 flow [2024-06-21 15:53:06,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6151, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6636, PETRI_PLACES=337, PETRI_TRANSITIONS=406} [2024-06-21 15:53:06,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-21 15:53:06,786 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 406 transitions, 6636 flow [2024-06-21 15:53:06,786 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) [2024-06-21 15:53:06,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:06,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:06,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 15:53:06,787 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)] === [2024-06-21 15:53:06,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1410285219, now seen corresponding path program 4 times [2024-06-21 15:53:06,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:06,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841810971] [2024-06-21 15:53:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:06,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:06,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:06,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841810971] [2024-06-21 15:53:06,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841810971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:06,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:06,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:06,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101636741] [2024-06-21 15:53:06,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:06,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:06,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:06,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:06,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:06,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 406 transitions, 6636 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) [2024-06-21 15:53:06,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:06,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:06,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:07,709 INFO L124 PetriNetUnfolderBase]: 2875/4869 cut-off events. [2024-06-21 15:53:07,709 INFO L125 PetriNetUnfolderBase]: For 618878/618878 co-relation queries the response was YES. [2024-06-21 15:53:07,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37029 conditions, 4869 events. 2875/4869 cut-off events. For 618878/618878 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32184 event pairs, 726 based on Foata normal form. 1/4854 useless extension candidates. Maximal degree in co-relation 36868. Up to 3861 conditions per place. [2024-06-21 15:53:07,773 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 185 changer transitions 0/422 dead transitions. [2024-06-21 15:53:07,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 422 transitions, 7894 flow [2024-06-21 15:53:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:53:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:53:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:53:07,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:53:07,774 INFO L175 Difference]: Start difference. First operand has 337 places, 406 transitions, 6636 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:53:07,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 422 transitions, 7894 flow [2024-06-21 15:53:10,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 422 transitions, 7545 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 15:53:10,316 INFO L231 Difference]: Finished difference. Result has 340 places, 406 transitions, 6665 flow [2024-06-21 15:53:10,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6665, PETRI_PLACES=340, PETRI_TRANSITIONS=406} [2024-06-21 15:53:10,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-21 15:53:10,317 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 406 transitions, 6665 flow [2024-06-21 15:53:10,317 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) [2024-06-21 15:53:10,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:10,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:10,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 15:53:10,317 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)] === [2024-06-21 15:53:10,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1547950055, now seen corresponding path program 8 times [2024-06-21 15:53:10,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:10,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53557564] [2024-06-21 15:53:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:10,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:10,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:10,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53557564] [2024-06-21 15:53:10,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53557564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:10,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:10,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:53:10,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538598865] [2024-06-21 15:53:10,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:10,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:53:10,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:53:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:53:10,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:10,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 406 transitions, 6665 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) [2024-06-21 15:53:10,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:10,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:10,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:11,314 INFO L124 PetriNetUnfolderBase]: 2872/4892 cut-off events. [2024-06-21 15:53:11,314 INFO L125 PetriNetUnfolderBase]: For 625300/625300 co-relation queries the response was YES. [2024-06-21 15:53:11,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37013 conditions, 4892 events. 2872/4892 cut-off events. For 625300/625300 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32337 event pairs, 655 based on Foata normal form. 1/4877 useless extension candidates. Maximal degree in co-relation 36851. Up to 3859 conditions per place. [2024-06-21 15:53:11,381 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 205 selfloop transitions, 216 changer transitions 0/429 dead transitions. [2024-06-21 15:53:11,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 429 transitions, 7959 flow [2024-06-21 15:53:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:53:11,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:53:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 15:53:11,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 15:53:11,382 INFO L175 Difference]: Start difference. First operand has 340 places, 406 transitions, 6665 flow. Second operand 8 states and 199 transitions. [2024-06-21 15:53:11,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 429 transitions, 7959 flow [2024-06-21 15:53:13,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 429 transitions, 7560 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 15:53:13,797 INFO L231 Difference]: Finished difference. Result has 342 places, 406 transitions, 6704 flow [2024-06-21 15:53:13,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6704, PETRI_PLACES=342, PETRI_TRANSITIONS=406} [2024-06-21 15:53:13,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-21 15:53:13,798 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 406 transitions, 6704 flow [2024-06-21 15:53:13,798 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) [2024-06-21 15:53:13,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:13,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:13,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 15:53:13,798 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)] === [2024-06-21 15:53:13,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1408063851, now seen corresponding path program 5 times [2024-06-21 15:53:13,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:13,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28711771] [2024-06-21 15:53:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:13,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:13,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28711771] [2024-06-21 15:53:13,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28711771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:13,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:13,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91226112] [2024-06-21 15:53:13,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:13,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:13,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:13,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:13,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 406 transitions, 6704 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) [2024-06-21 15:53:13,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:13,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:13,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:14,806 INFO L124 PetriNetUnfolderBase]: 2877/4902 cut-off events. [2024-06-21 15:53:14,806 INFO L125 PetriNetUnfolderBase]: For 637719/637719 co-relation queries the response was YES. [2024-06-21 15:53:14,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37237 conditions, 4902 events. 2877/4902 cut-off events. For 637719/637719 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32598 event pairs, 638 based on Foata normal form. 1/4897 useless extension candidates. Maximal degree in co-relation 37074. Up to 4105 conditions per place. [2024-06-21 15:53:14,878 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 301 selfloop transitions, 117 changer transitions 0/426 dead transitions. [2024-06-21 15:53:14,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 426 transitions, 8047 flow [2024-06-21 15:53:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:53:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:53:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 15:53:14,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 15:53:14,879 INFO L175 Difference]: Start difference. First operand has 342 places, 406 transitions, 6704 flow. Second operand 8 states and 191 transitions. [2024-06-21 15:53:14,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 426 transitions, 8047 flow [2024-06-21 15:53:17,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 426 transitions, 7448 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 15:53:17,559 INFO L231 Difference]: Finished difference. Result has 342 places, 409 transitions, 6414 flow [2024-06-21 15:53:17,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6109, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6414, PETRI_PLACES=342, PETRI_TRANSITIONS=409} [2024-06-21 15:53:17,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-21 15:53:17,560 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 409 transitions, 6414 flow [2024-06-21 15:53:17,560 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) [2024-06-21 15:53:17,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:17,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:17,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 15:53:17,561 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)] === [2024-06-21 15:53:17,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1383232381, now seen corresponding path program 6 times [2024-06-21 15:53:17,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:17,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654947883] [2024-06-21 15:53:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:17,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:17,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:17,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654947883] [2024-06-21 15:53:17,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654947883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:17,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:17,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:17,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889488207] [2024-06-21 15:53:17,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:17,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:17,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:17,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:17,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 409 transitions, 6414 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) [2024-06-21 15:53:17,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:17,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:17,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:18,521 INFO L124 PetriNetUnfolderBase]: 2882/4923 cut-off events. [2024-06-21 15:53:18,521 INFO L125 PetriNetUnfolderBase]: For 644848/644848 co-relation queries the response was YES. [2024-06-21 15:53:18,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37082 conditions, 4923 events. 2882/4923 cut-off events. For 644848/644848 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32854 event pairs, 650 based on Foata normal form. 1/4918 useless extension candidates. Maximal degree in co-relation 36918. Up to 4109 conditions per place. [2024-06-21 15:53:18,591 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 305 selfloop transitions, 118 changer transitions 0/431 dead transitions. [2024-06-21 15:53:18,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 431 transitions, 7779 flow [2024-06-21 15:53:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:53:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:53:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 15:53:18,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 15:53:18,592 INFO L175 Difference]: Start difference. First operand has 342 places, 409 transitions, 6414 flow. Second operand 7 states and 176 transitions. [2024-06-21 15:53:18,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 431 transitions, 7779 flow [2024-06-21 15:53:21,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 431 transitions, 7488 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 15:53:21,464 INFO L231 Difference]: Finished difference. Result has 343 places, 412 transitions, 6434 flow [2024-06-21 15:53:21,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6434, PETRI_PLACES=343, PETRI_TRANSITIONS=412} [2024-06-21 15:53:21,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-21 15:53:21,465 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 412 transitions, 6434 flow [2024-06-21 15:53:21,465 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) [2024-06-21 15:53:21,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:21,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:21,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 15:53:21,465 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)] === [2024-06-21 15:53:21,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:21,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1343975759, now seen corresponding path program 9 times [2024-06-21 15:53:21,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:21,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648015753] [2024-06-21 15:53:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:21,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:21,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:21,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648015753] [2024-06-21 15:53:21,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648015753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:21,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:21,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:21,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034262506] [2024-06-21 15:53:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:21,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:21,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:21,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:21,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:21,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:21,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 412 transitions, 6434 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) [2024-06-21 15:53:21,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:21,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:21,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:22,455 INFO L124 PetriNetUnfolderBase]: 2879/4916 cut-off events. [2024-06-21 15:53:22,455 INFO L125 PetriNetUnfolderBase]: For 650424/650424 co-relation queries the response was YES. [2024-06-21 15:53:22,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37048 conditions, 4916 events. 2879/4916 cut-off events. For 650424/650424 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32675 event pairs, 620 based on Foata normal form. 1/4914 useless extension candidates. Maximal degree in co-relation 36883. Up to 4406 conditions per place. [2024-06-21 15:53:22,524 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 37 changer transitions 0/432 dead transitions. [2024-06-21 15:53:22,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 432 transitions, 7545 flow [2024-06-21 15:53:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:53:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:53:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 15:53:22,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 15:53:22,524 INFO L175 Difference]: Start difference. First operand has 343 places, 412 transitions, 6434 flow. Second operand 8 states and 188 transitions. [2024-06-21 15:53:22,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 432 transitions, 7545 flow [2024-06-21 15:53:25,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 432 transitions, 7287 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 15:53:25,399 INFO L231 Difference]: Finished difference. Result has 346 places, 412 transitions, 6256 flow [2024-06-21 15:53:25,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6176, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6256, PETRI_PLACES=346, PETRI_TRANSITIONS=412} [2024-06-21 15:53:25,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-21 15:53:25,400 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 412 transitions, 6256 flow [2024-06-21 15:53:25,400 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) [2024-06-21 15:53:25,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:25,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 15:53:25,401 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)] === [2024-06-21 15:53:25,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:25,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1057491659, now seen corresponding path program 10 times [2024-06-21 15:53:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217024360] [2024-06-21 15:53:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:25,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:25,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217024360] [2024-06-21 15:53:25,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217024360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:25,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:25,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:53:25,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714513969] [2024-06-21 15:53:25,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:25,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:53:25,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:25,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:53:25,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:53:25,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:25,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 412 transitions, 6256 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) [2024-06-21 15:53:25,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:25,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:25,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:26,502 INFO L124 PetriNetUnfolderBase]: 2876/4912 cut-off events. [2024-06-21 15:53:26,503 INFO L125 PetriNetUnfolderBase]: For 655751/655751 co-relation queries the response was YES. [2024-06-21 15:53:26,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36709 conditions, 4912 events. 2876/4912 cut-off events. For 655751/655751 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32645 event pairs, 620 based on Foata normal form. 1/4910 useless extension candidates. Maximal degree in co-relation 36544. Up to 4403 conditions per place. [2024-06-21 15:53:26,575 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 37 changer transitions 0/432 dead transitions. [2024-06-21 15:53:26,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 432 transitions, 7163 flow [2024-06-21 15:53:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:53:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:53:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 15:53:26,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-21 15:53:26,576 INFO L175 Difference]: Start difference. First operand has 346 places, 412 transitions, 6256 flow. Second operand 9 states and 206 transitions. [2024-06-21 15:53:26,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 432 transitions, 7163 flow [2024-06-21 15:53:29,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 432 transitions, 7085 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 15:53:29,651 INFO L231 Difference]: Finished difference. Result has 350 places, 412 transitions, 6258 flow [2024-06-21 15:53:29,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6178, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6258, PETRI_PLACES=350, PETRI_TRANSITIONS=412} [2024-06-21 15:53:29,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-21 15:53:29,651 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 412 transitions, 6258 flow [2024-06-21 15:53:29,651 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) [2024-06-21 15:53:29,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:29,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:29,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 15:53:29,652 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)] === [2024-06-21 15:53:29,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:29,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1182353331, now seen corresponding path program 7 times [2024-06-21 15:53:29,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:29,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540882742] [2024-06-21 15:53:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:29,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:29,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:29,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540882742] [2024-06-21 15:53:29,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540882742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:29,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:29,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:29,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444628857] [2024-06-21 15:53:29,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:29,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:29,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:29,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:29,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:29,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:29,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 412 transitions, 6258 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) [2024-06-21 15:53:29,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:29,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:29,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:30,569 INFO L124 PetriNetUnfolderBase]: 2873/4899 cut-off events. [2024-06-21 15:53:30,569 INFO L125 PetriNetUnfolderBase]: For 663085/663085 co-relation queries the response was YES. [2024-06-21 15:53:30,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36678 conditions, 4899 events. 2873/4899 cut-off events. For 663085/663085 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32604 event pairs, 640 based on Foata normal form. 1/4894 useless extension candidates. Maximal degree in co-relation 36512. Up to 4103 conditions per place. [2024-06-21 15:53:30,639 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 306 selfloop transitions, 119 changer transitions 0/433 dead transitions. [2024-06-21 15:53:30,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 433 transitions, 7368 flow [2024-06-21 15:53:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:53:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:53:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:53:30,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:53:30,641 INFO L175 Difference]: Start difference. First operand has 350 places, 412 transitions, 6258 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:53:30,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 433 transitions, 7368 flow [2024-06-21 15:53:33,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 433 transitions, 7246 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 15:53:33,785 INFO L231 Difference]: Finished difference. Result has 348 places, 412 transitions, 6382 flow [2024-06-21 15:53:33,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6382, PETRI_PLACES=348, PETRI_TRANSITIONS=412} [2024-06-21 15:53:33,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-21 15:53:33,786 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 412 transitions, 6382 flow [2024-06-21 15:53:33,786 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) [2024-06-21 15:53:33,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:33,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:33,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 15:53:33,786 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)] === [2024-06-21 15:53:33,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:33,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1241823505, now seen corresponding path program 1 times [2024-06-21 15:53:33,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:33,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907751133] [2024-06-21 15:53:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:33,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:33,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907751133] [2024-06-21 15:53:33,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907751133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:33,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:33,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:33,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571770960] [2024-06-21 15:53:33,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:33,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:33,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:33,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:33,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:33,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:33,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 412 transitions, 6382 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) [2024-06-21 15:53:33,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:33,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:33,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:34,807 INFO L124 PetriNetUnfolderBase]: 2893/4935 cut-off events. [2024-06-21 15:53:34,807 INFO L125 PetriNetUnfolderBase]: For 704180/704180 co-relation queries the response was YES. [2024-06-21 15:53:34,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37210 conditions, 4935 events. 2893/4935 cut-off events. For 704180/704180 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32913 event pairs, 514 based on Foata normal form. 6/4935 useless extension candidates. Maximal degree in co-relation 37043. Up to 4222 conditions per place. [2024-06-21 15:53:34,870 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 403 selfloop transitions, 25 changer transitions 0/436 dead transitions. [2024-06-21 15:53:34,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 436 transitions, 7563 flow [2024-06-21 15:53:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:53:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:53:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 15:53:34,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-21 15:53:34,871 INFO L175 Difference]: Start difference. First operand has 348 places, 412 transitions, 6382 flow. Second operand 6 states and 149 transitions. [2024-06-21 15:53:34,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 436 transitions, 7563 flow [2024-06-21 15:53:37,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 436 transitions, 7270 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 15:53:37,414 INFO L231 Difference]: Finished difference. Result has 347 places, 413 transitions, 6156 flow [2024-06-21 15:53:37,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6089, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6156, PETRI_PLACES=347, PETRI_TRANSITIONS=413} [2024-06-21 15:53:37,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-21 15:53:37,415 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 413 transitions, 6156 flow [2024-06-21 15:53:37,415 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) [2024-06-21 15:53:37,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:37,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:37,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 15:53:37,416 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)] === [2024-06-21 15:53:37,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1683607861, now seen corresponding path program 2 times [2024-06-21 15:53:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:37,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034364143] [2024-06-21 15:53:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:37,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034364143] [2024-06-21 15:53:37,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034364143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:37,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:37,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:37,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980475164] [2024-06-21 15:53:37,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:37,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:37,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:37,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:37,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:37,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:37,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 413 transitions, 6156 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) [2024-06-21 15:53:37,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:37,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:37,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:38,340 INFO L124 PetriNetUnfolderBase]: 2880/4916 cut-off events. [2024-06-21 15:53:38,341 INFO L125 PetriNetUnfolderBase]: For 681157/681157 co-relation queries the response was YES. [2024-06-21 15:53:38,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36338 conditions, 4916 events. 2880/4916 cut-off events. For 681157/681157 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32763 event pairs, 503 based on Foata normal form. 6/4916 useless extension candidates. Maximal degree in co-relation 36170. Up to 4216 conditions per place. [2024-06-21 15:53:38,410 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 399 selfloop transitions, 25 changer transitions 1/433 dead transitions. [2024-06-21 15:53:38,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 433 transitions, 7102 flow [2024-06-21 15:53:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:53:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:53:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 15:53:38,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-21 15:53:38,411 INFO L175 Difference]: Start difference. First operand has 347 places, 413 transitions, 6156 flow. Second operand 5 states and 129 transitions. [2024-06-21 15:53:38,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 433 transitions, 7102 flow [2024-06-21 15:53:41,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 433 transitions, 7030 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 15:53:41,708 INFO L231 Difference]: Finished difference. Result has 349 places, 413 transitions, 6140 flow [2024-06-21 15:53:41,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6140, PETRI_PLACES=349, PETRI_TRANSITIONS=413} [2024-06-21 15:53:41,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-21 15:53:41,709 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 413 transitions, 6140 flow [2024-06-21 15:53:41,709 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) [2024-06-21 15:53:41,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:41,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:41,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 15:53:41,710 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)] === [2024-06-21 15:53:41,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:41,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1112373681, now seen corresponding path program 1 times [2024-06-21 15:53:41,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:41,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315753035] [2024-06-21 15:53:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:41,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:41,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:41,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315753035] [2024-06-21 15:53:41,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315753035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:41,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:41,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:41,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668818222] [2024-06-21 15:53:41,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:41,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:41,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:41,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:41,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 413 transitions, 6140 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) [2024-06-21 15:53:41,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:41,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:41,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:42,725 INFO L124 PetriNetUnfolderBase]: 3019/5113 cut-off events. [2024-06-21 15:53:42,725 INFO L125 PetriNetUnfolderBase]: For 801122/801122 co-relation queries the response was YES. [2024-06-21 15:53:42,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40270 conditions, 5113 events. 3019/5113 cut-off events. For 801122/801122 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 33954 event pairs, 659 based on Foata normal form. 2/5093 useless extension candidates. Maximal degree in co-relation 40102. Up to 4276 conditions per place. [2024-06-21 15:53:42,797 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 318 selfloop transitions, 124 changer transitions 0/450 dead transitions. [2024-06-21 15:53:42,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 450 transitions, 7494 flow [2024-06-21 15:53:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:53:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:53:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 15:53:42,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 15:53:42,798 INFO L175 Difference]: Start difference. First operand has 349 places, 413 transitions, 6140 flow. Second operand 7 states and 182 transitions. [2024-06-21 15:53:42,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 450 transitions, 7494 flow [2024-06-21 15:53:45,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 450 transitions, 7423 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 15:53:45,830 INFO L231 Difference]: Finished difference. Result has 352 places, 421 transitions, 6529 flow [2024-06-21 15:53:45,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6071, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6529, PETRI_PLACES=352, PETRI_TRANSITIONS=421} [2024-06-21 15:53:45,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-21 15:53:45,830 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 421 transitions, 6529 flow [2024-06-21 15:53:45,831 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) [2024-06-21 15:53:45,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:45,831 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] [2024-06-21 15:53:45,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 15:53:45,831 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)] === [2024-06-21 15:53:45,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1338206637, now seen corresponding path program 2 times [2024-06-21 15:53:45,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:45,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359190294] [2024-06-21 15:53:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:45,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:45,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:45,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359190294] [2024-06-21 15:53:45,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359190294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:45,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:45,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:45,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683835025] [2024-06-21 15:53:45,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:45,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:45,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:45,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:45,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:45,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:45,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 421 transitions, 6529 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) [2024-06-21 15:53:45,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:45,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:45,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:46,845 INFO L124 PetriNetUnfolderBase]: 3014/5120 cut-off events. [2024-06-21 15:53:46,845 INFO L125 PetriNetUnfolderBase]: For 791597/791597 co-relation queries the response was YES. [2024-06-21 15:53:46,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40469 conditions, 5120 events. 3014/5120 cut-off events. For 791597/791597 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34142 event pairs, 674 based on Foata normal form. 2/5109 useless extension candidates. Maximal degree in co-relation 40300. Up to 4422 conditions per place. [2024-06-21 15:53:46,920 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 317 selfloop transitions, 117 changer transitions 0/442 dead transitions. [2024-06-21 15:53:46,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 442 transitions, 7449 flow [2024-06-21 15:53:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:53:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:53:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 15:53:46,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 15:53:46,921 INFO L175 Difference]: Start difference. First operand has 352 places, 421 transitions, 6529 flow. Second operand 7 states and 174 transitions. [2024-06-21 15:53:46,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 442 transitions, 7449 flow [2024-06-21 15:53:50,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 442 transitions, 7185 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 15:53:50,789 INFO L231 Difference]: Finished difference. Result has 355 places, 421 transitions, 6504 flow [2024-06-21 15:53:50,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6504, PETRI_PLACES=355, PETRI_TRANSITIONS=421} [2024-06-21 15:53:50,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-21 15:53:50,790 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 421 transitions, 6504 flow [2024-06-21 15:53:50,790 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) [2024-06-21 15:53:50,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:50,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:50,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 15:53:50,790 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)] === [2024-06-21 15:53:50,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1222915467, now seen corresponding path program 3 times [2024-06-21 15:53:50,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:50,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011704813] [2024-06-21 15:53:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:50,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:50,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:50,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011704813] [2024-06-21 15:53:50,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011704813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:50,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:50,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:53:50,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827285052] [2024-06-21 15:53:50,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:50,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:53:50,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:50,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:53:50,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:53:50,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:50,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 421 transitions, 6504 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) [2024-06-21 15:53:50,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:50,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:50,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:51,835 INFO L124 PetriNetUnfolderBase]: 3022/5124 cut-off events. [2024-06-21 15:53:51,835 INFO L125 PetriNetUnfolderBase]: For 805712/805712 co-relation queries the response was YES. [2024-06-21 15:53:51,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40543 conditions, 5124 events. 3022/5124 cut-off events. For 805712/805712 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34050 event pairs, 666 based on Foata normal form. 2/5113 useless extension candidates. Maximal degree in co-relation 40373. Up to 4434 conditions per place. [2024-06-21 15:53:51,911 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 116 changer transitions 0/445 dead transitions. [2024-06-21 15:53:51,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 445 transitions, 7479 flow [2024-06-21 15:53:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:53:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:53:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 15:53:51,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 15:53:51,913 INFO L175 Difference]: Start difference. First operand has 355 places, 421 transitions, 6504 flow. Second operand 8 states and 193 transitions. [2024-06-21 15:53:51,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 445 transitions, 7479 flow [2024-06-21 15:53:55,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 445 transitions, 7250 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 15:53:55,036 INFO L231 Difference]: Finished difference. Result has 359 places, 423 transitions, 6563 flow [2024-06-21 15:53:55,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6563, PETRI_PLACES=359, PETRI_TRANSITIONS=423} [2024-06-21 15:53:55,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-21 15:53:55,037 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 423 transitions, 6563 flow [2024-06-21 15:53:55,037 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) [2024-06-21 15:53:55,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:55,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:55,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 15:53:55,037 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)] === [2024-06-21 15:53:55,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:55,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1496750709, now seen corresponding path program 4 times [2024-06-21 15:53:55,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:55,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229494194] [2024-06-21 15:53:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:55,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:55,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:55,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229494194] [2024-06-21 15:53:55,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229494194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:55,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:55,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:55,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64072835] [2024-06-21 15:53:55,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:55,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:55,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:55,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:55,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:55,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:55,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 423 transitions, 6563 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) [2024-06-21 15:53:55,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:55,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:55,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:56,177 INFO L124 PetriNetUnfolderBase]: 3030/5141 cut-off events. [2024-06-21 15:53:56,178 INFO L125 PetriNetUnfolderBase]: For 819993/819993 co-relation queries the response was YES. [2024-06-21 15:53:56,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40807 conditions, 5141 events. 3030/5141 cut-off events. For 819993/819993 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34259 event pairs, 637 based on Foata normal form. 2/5138 useless extension candidates. Maximal degree in co-relation 40636. Up to 4641 conditions per place. [2024-06-21 15:53:56,246 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 406 selfloop transitions, 31 changer transitions 0/445 dead transitions. [2024-06-21 15:53:56,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 445 transitions, 7545 flow [2024-06-21 15:53:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:53:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:53:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 15:53:56,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-21 15:53:56,247 INFO L175 Difference]: Start difference. First operand has 359 places, 423 transitions, 6563 flow. Second operand 8 states and 186 transitions. [2024-06-21 15:53:56,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 445 transitions, 7545 flow [2024-06-21 15:53:59,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 445 transitions, 7288 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 15:53:59,108 INFO L231 Difference]: Finished difference. Result has 362 places, 425 transitions, 6426 flow [2024-06-21 15:53:59,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6308, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6426, PETRI_PLACES=362, PETRI_TRANSITIONS=425} [2024-06-21 15:53:59,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-21 15:53:59,108 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 425 transitions, 6426 flow [2024-06-21 15:53:59,108 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) [2024-06-21 15:53:59,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:59,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:59,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 15:53:59,109 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)] === [2024-06-21 15:53:59,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2040038671, now seen corresponding path program 11 times [2024-06-21 15:53:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:59,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057939089] [2024-06-21 15:53:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:59,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:59,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:59,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057939089] [2024-06-21 15:53:59,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057939089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:59,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:59,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:53:59,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816610474] [2024-06-21 15:53:59,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:59,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:53:59,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:59,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:53:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:53:59,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:53:59,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 425 transitions, 6426 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) [2024-06-21 15:53:59,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:59,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:53:59,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:00,078 INFO L124 PetriNetUnfolderBase]: 3035/5140 cut-off events. [2024-06-21 15:54:00,079 INFO L125 PetriNetUnfolderBase]: For 829424/829430 co-relation queries the response was YES. [2024-06-21 15:54:00,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40734 conditions, 5140 events. 3035/5140 cut-off events. For 829424/829430 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34363 event pairs, 718 based on Foata normal form. 5/5134 useless extension candidates. Maximal degree in co-relation 40562. Up to 4104 conditions per place. [2024-06-21 15:54:00,153 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 193 changer transitions 0/450 dead transitions. [2024-06-21 15:54:00,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 450 transitions, 7866 flow [2024-06-21 15:54:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:54:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:54:00,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:54:00,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:54:00,154 INFO L175 Difference]: Start difference. First operand has 362 places, 425 transitions, 6426 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:54:00,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 450 transitions, 7866 flow [2024-06-21 15:54:03,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 450 transitions, 7777 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 15:54:03,477 INFO L231 Difference]: Finished difference. Result has 363 places, 428 transitions, 6791 flow [2024-06-21 15:54:03,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6791, PETRI_PLACES=363, PETRI_TRANSITIONS=428} [2024-06-21 15:54:03,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-21 15:54:03,477 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 428 transitions, 6791 flow [2024-06-21 15:54:03,477 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) [2024-06-21 15:54:03,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:03,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:03,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 15:54:03,478 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)] === [2024-06-21 15:54:03,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1951538127, now seen corresponding path program 12 times [2024-06-21 15:54:03,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:03,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841713920] [2024-06-21 15:54:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:03,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:03,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:03,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841713920] [2024-06-21 15:54:03,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841713920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:03,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:03,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:54:03,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797921489] [2024-06-21 15:54:03,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:03,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:54:03,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:54:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:54:03,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:03,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 428 transitions, 6791 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) [2024-06-21 15:54:03,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:03,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:03,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:04,455 INFO L124 PetriNetUnfolderBase]: 3040/5153 cut-off events. [2024-06-21 15:54:04,455 INFO L125 PetriNetUnfolderBase]: For 846888/846894 co-relation queries the response was YES. [2024-06-21 15:54:04,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41402 conditions, 5153 events. 3040/5153 cut-off events. For 846888/846894 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34421 event pairs, 720 based on Foata normal form. 5/5147 useless extension candidates. Maximal degree in co-relation 41229. Up to 4108 conditions per place. [2024-06-21 15:54:04,535 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 193 changer transitions 0/450 dead transitions. [2024-06-21 15:54:04,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 450 transitions, 8233 flow [2024-06-21 15:54:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:54:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:54:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:54:04,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:54:04,536 INFO L175 Difference]: Start difference. First operand has 363 places, 428 transitions, 6791 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:54:04,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 450 transitions, 8233 flow [2024-06-21 15:54:08,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 450 transitions, 7611 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-21 15:54:08,299 INFO L231 Difference]: Finished difference. Result has 365 places, 431 transitions, 6629 flow [2024-06-21 15:54:08,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6629, PETRI_PLACES=365, PETRI_TRANSITIONS=431} [2024-06-21 15:54:08,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-21 15:54:08,299 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 431 transitions, 6629 flow [2024-06-21 15:54:08,299 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) [2024-06-21 15:54:08,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:08,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:08,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 15:54:08,300 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)] === [2024-06-21 15:54:08,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:08,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1355861041, now seen corresponding path program 13 times [2024-06-21 15:54:08,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:08,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167688805] [2024-06-21 15:54:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:08,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:08,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:08,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167688805] [2024-06-21 15:54:08,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167688805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:08,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:08,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:54:08,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575608059] [2024-06-21 15:54:08,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:08,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:54:08,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:54:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:54:08,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:08,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 431 transitions, 6629 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) [2024-06-21 15:54:08,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:08,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:08,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:09,328 INFO L124 PetriNetUnfolderBase]: 3066/5197 cut-off events. [2024-06-21 15:54:09,328 INFO L125 PetriNetUnfolderBase]: For 877012/877018 co-relation queries the response was YES. [2024-06-21 15:54:09,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41829 conditions, 5197 events. 3066/5197 cut-off events. For 877012/877018 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34795 event pairs, 720 based on Foata normal form. 6/5192 useless extension candidates. Maximal degree in co-relation 41656. Up to 4136 conditions per place. [2024-06-21 15:54:09,402 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 254 selfloop transitions, 195 changer transitions 0/457 dead transitions. [2024-06-21 15:54:09,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 457 transitions, 8175 flow [2024-06-21 15:54:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:54:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:54:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:54:09,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:54:09,403 INFO L175 Difference]: Start difference. First operand has 365 places, 431 transitions, 6629 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:54:09,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 457 transitions, 8175 flow [2024-06-21 15:54:13,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 457 transitions, 7792 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 15:54:13,039 INFO L231 Difference]: Finished difference. Result has 368 places, 441 transitions, 6807 flow [2024-06-21 15:54:13,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6807, PETRI_PLACES=368, PETRI_TRANSITIONS=441} [2024-06-21 15:54:13,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-21 15:54:13,040 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 441 transitions, 6807 flow [2024-06-21 15:54:13,040 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) [2024-06-21 15:54:13,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:13,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:13,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 15:54:13,040 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)] === [2024-06-21 15:54:13,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:13,041 INFO L85 PathProgramCache]: Analyzing trace with hash -247479179, now seen corresponding path program 14 times [2024-06-21 15:54:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:13,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685361207] [2024-06-21 15:54:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:13,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:13,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:13,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685361207] [2024-06-21 15:54:13,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685361207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:13,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:13,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:54:13,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213701495] [2024-06-21 15:54:13,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:13,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:54:13,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:54:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:54:13,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:13,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 441 transitions, 6807 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) [2024-06-21 15:54:13,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:13,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:13,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:14,086 INFO L124 PetriNetUnfolderBase]: 3063/5181 cut-off events. [2024-06-21 15:54:14,086 INFO L125 PetriNetUnfolderBase]: For 880238/880238 co-relation queries the response was YES. [2024-06-21 15:54:14,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41815 conditions, 5181 events. 3063/5181 cut-off events. For 880238/880238 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34599 event pairs, 752 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 41641. Up to 4134 conditions per place. [2024-06-21 15:54:14,160 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 247 selfloop transitions, 212 changer transitions 0/467 dead transitions. [2024-06-21 15:54:14,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 467 transitions, 8241 flow [2024-06-21 15:54:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:54:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:54:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 15:54:14,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 15:54:14,161 INFO L175 Difference]: Start difference. First operand has 368 places, 441 transitions, 6807 flow. Second operand 8 states and 202 transitions. [2024-06-21 15:54:14,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 467 transitions, 8241 flow [2024-06-21 15:54:18,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 467 transitions, 7950 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 15:54:18,079 INFO L231 Difference]: Finished difference. Result has 373 places, 441 transitions, 6946 flow [2024-06-21 15:54:18,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6946, PETRI_PLACES=373, PETRI_TRANSITIONS=441} [2024-06-21 15:54:18,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-21 15:54:18,080 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 441 transitions, 6946 flow [2024-06-21 15:54:18,080 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) [2024-06-21 15:54:18,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:18,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:18,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 15:54:18,081 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)] === [2024-06-21 15:54:18,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:18,081 INFO L85 PathProgramCache]: Analyzing trace with hash 371892567, now seen corresponding path program 15 times [2024-06-21 15:54:18,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:18,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048757975] [2024-06-21 15:54:18,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:18,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:18,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048757975] [2024-06-21 15:54:18,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048757975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:18,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:18,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:54:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128390419] [2024-06-21 15:54:18,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:18,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:54:18,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:54:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:54:18,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:18,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 441 transitions, 6946 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) [2024-06-21 15:54:18,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:18,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:18,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:19,270 INFO L124 PetriNetUnfolderBase]: 3068/5184 cut-off events. [2024-06-21 15:54:19,270 INFO L125 PetriNetUnfolderBase]: For 898897/898897 co-relation queries the response was YES. [2024-06-21 15:54:19,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42122 conditions, 5184 events. 3068/5184 cut-off events. For 898897/898897 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34601 event pairs, 761 based on Foata normal form. 1/5169 useless extension candidates. Maximal degree in co-relation 41947. Up to 4138 conditions per place. [2024-06-21 15:54:19,350 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 212 changer transitions 0/466 dead transitions. [2024-06-21 15:54:19,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 466 transitions, 8223 flow [2024-06-21 15:54:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:54:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:54:19,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 15:54:19,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 15:54:19,351 INFO L175 Difference]: Start difference. First operand has 373 places, 441 transitions, 6946 flow. Second operand 8 states and 196 transitions. [2024-06-21 15:54:19,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 466 transitions, 8223 flow [2024-06-21 15:54:23,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 466 transitions, 7456 flow, removed 56 selfloop flow, removed 10 redundant places. [2024-06-21 15:54:23,707 INFO L231 Difference]: Finished difference. Result has 371 places, 444 transitions, 6690 flow [2024-06-21 15:54:23,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6690, PETRI_PLACES=371, PETRI_TRANSITIONS=444} [2024-06-21 15:54:23,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-21 15:54:23,708 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 444 transitions, 6690 flow [2024-06-21 15:54:23,708 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) [2024-06-21 15:54:23,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:23,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:23,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 15:54:23,709 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)] === [2024-06-21 15:54:23,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:23,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1123057493, now seen corresponding path program 16 times [2024-06-21 15:54:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:23,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804806989] [2024-06-21 15:54:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:23,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:23,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804806989] [2024-06-21 15:54:23,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804806989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:23,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:23,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:54:23,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653098194] [2024-06-21 15:54:23,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:23,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:54:23,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:23,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:54:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:54:23,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:23,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 444 transitions, 6690 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) [2024-06-21 15:54:23,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:23,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:23,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:24,758 INFO L124 PetriNetUnfolderBase]: 3081/5196 cut-off events. [2024-06-21 15:54:24,758 INFO L125 PetriNetUnfolderBase]: For 918039/918039 co-relation queries the response was YES. [2024-06-21 15:54:24,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41934 conditions, 5196 events. 3081/5196 cut-off events. For 918039/918039 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34648 event pairs, 750 based on Foata normal form. 1/5181 useless extension candidates. Maximal degree in co-relation 41760. Up to 4148 conditions per place. [2024-06-21 15:54:24,834 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 245 selfloop transitions, 217 changer transitions 0/470 dead transitions. [2024-06-21 15:54:24,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 470 transitions, 8221 flow [2024-06-21 15:54:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:54:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:54:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 15:54:24,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 15:54:24,835 INFO L175 Difference]: Start difference. First operand has 371 places, 444 transitions, 6690 flow. Second operand 8 states and 195 transitions. [2024-06-21 15:54:24,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 470 transitions, 8221 flow [2024-06-21 15:54:28,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 470 transitions, 7929 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 15:54:28,889 INFO L231 Difference]: Finished difference. Result has 374 places, 450 transitions, 6953 flow [2024-06-21 15:54:28,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6402, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6953, PETRI_PLACES=374, PETRI_TRANSITIONS=450} [2024-06-21 15:54:28,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-21 15:54:28,889 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 450 transitions, 6953 flow [2024-06-21 15:54:28,889 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) [2024-06-21 15:54:28,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:28,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:28,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 15:54:28,890 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)] === [2024-06-21 15:54:28,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:28,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1503429281, now seen corresponding path program 17 times [2024-06-21 15:54:28,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:28,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305860649] [2024-06-21 15:54:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:28,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305860649] [2024-06-21 15:54:28,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305860649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:28,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:28,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:54:28,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126408332] [2024-06-21 15:54:28,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:28,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:54:28,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:54:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:54:29,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:29,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 450 transitions, 6953 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) [2024-06-21 15:54:29,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:29,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:29,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:29,943 INFO L124 PetriNetUnfolderBase]: 3078/5190 cut-off events. [2024-06-21 15:54:29,943 INFO L125 PetriNetUnfolderBase]: For 930556/930556 co-relation queries the response was YES. [2024-06-21 15:54:30,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42033 conditions, 5190 events. 3078/5190 cut-off events. For 930556/930556 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34565 event pairs, 753 based on Foata normal form. 1/5175 useless extension candidates. Maximal degree in co-relation 41856. Up to 4146 conditions per place. [2024-06-21 15:54:30,025 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 247 selfloop transitions, 214 changer transitions 0/469 dead transitions. [2024-06-21 15:54:30,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 469 transitions, 8153 flow [2024-06-21 15:54:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:54:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:54:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 15:54:30,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 15:54:30,026 INFO L175 Difference]: Start difference. First operand has 374 places, 450 transitions, 6953 flow. Second operand 8 states and 193 transitions. [2024-06-21 15:54:30,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 469 transitions, 8153 flow [2024-06-21 15:54:33,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 469 transitions, 7851 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 15:54:33,728 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 7085 flow [2024-06-21 15:54:33,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6651, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7085, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-21 15:54:33,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-21 15:54:33,728 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 7085 flow [2024-06-21 15:54:33,728 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) [2024-06-21 15:54:33,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:33,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:33,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 15:54:33,729 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)] === [2024-06-21 15:54:33,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash -214672839, now seen corresponding path program 18 times [2024-06-21 15:54:33,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:33,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713448342] [2024-06-21 15:54:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:33,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:33,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:33,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713448342] [2024-06-21 15:54:33,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713448342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:33,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:33,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:54:33,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51670502] [2024-06-21 15:54:33,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:33,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:54:33,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:33,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:54:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:54:33,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:33,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 7085 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) [2024-06-21 15:54:33,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:33,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:33,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:34,772 INFO L124 PetriNetUnfolderBase]: 3072/5194 cut-off events. [2024-06-21 15:54:34,772 INFO L125 PetriNetUnfolderBase]: For 942266/942266 co-relation queries the response was YES. [2024-06-21 15:54:34,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41969 conditions, 5194 events. 3072/5194 cut-off events. For 942266/942266 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34766 event pairs, 728 based on Foata normal form. 2/5180 useless extension candidates. Maximal degree in co-relation 41790. Up to 4141 conditions per place. [2024-06-21 15:54:34,850 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 209 changer transitions 0/467 dead transitions. [2024-06-21 15:54:34,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 467 transitions, 8511 flow [2024-06-21 15:54:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:54:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:54:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 15:54:34,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 15:54:34,852 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 7085 flow. Second operand 8 states and 195 transitions. [2024-06-21 15:54:34,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 467 transitions, 8511 flow [2024-06-21 15:54:38,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 467 transitions, 7915 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 15:54:38,799 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 6914 flow [2024-06-21 15:54:38,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6914, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-21 15:54:38,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-21 15:54:38,800 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 6914 flow [2024-06-21 15:54:38,800 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) [2024-06-21 15:54:38,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:38,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:38,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 15:54:38,801 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)] === [2024-06-21 15:54:38,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash 147000181, now seen corresponding path program 19 times [2024-06-21 15:54:38,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:38,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095465285] [2024-06-21 15:54:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:38,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:38,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095465285] [2024-06-21 15:54:38,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095465285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:38,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:38,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:54:38,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551002141] [2024-06-21 15:54:38,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:38,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:54:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:38,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:54:38,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:54:38,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:38,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 6914 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) [2024-06-21 15:54:38,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:38,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:38,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:39,907 INFO L124 PetriNetUnfolderBase]: 3066/5198 cut-off events. [2024-06-21 15:54:39,907 INFO L125 PetriNetUnfolderBase]: For 938204/938204 co-relation queries the response was YES. [2024-06-21 15:54:39,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41714 conditions, 5198 events. 3066/5198 cut-off events. For 938204/938204 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34853 event pairs, 738 based on Foata normal form. 2/5184 useless extension candidates. Maximal degree in co-relation 41535. Up to 4136 conditions per place. [2024-06-21 15:54:39,986 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 216 changer transitions 0/470 dead transitions. [2024-06-21 15:54:39,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 470 transitions, 8592 flow [2024-06-21 15:54:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:54:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:54:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-21 15:54:39,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-21 15:54:39,987 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 6914 flow. Second operand 10 states and 239 transitions. [2024-06-21 15:54:39,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 470 transitions, 8592 flow [2024-06-21 15:54:44,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 470 transitions, 7967 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 15:54:44,431 INFO L231 Difference]: Finished difference. Result has 381 places, 450 transitions, 6728 flow [2024-06-21 15:54:44,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6728, PETRI_PLACES=381, PETRI_TRANSITIONS=450} [2024-06-21 15:54:44,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-21 15:54:44,431 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 450 transitions, 6728 flow [2024-06-21 15:54:44,431 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) [2024-06-21 15:54:44,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:44,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:44,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 15:54:44,432 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)] === [2024-06-21 15:54:44,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash 146792791, now seen corresponding path program 20 times [2024-06-21 15:54:44,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:44,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080068757] [2024-06-21 15:54:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:44,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:44,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:44,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080068757] [2024-06-21 15:54:44,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080068757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:44,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:44,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:54:44,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463794859] [2024-06-21 15:54:44,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:44,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:54:44,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:44,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:54:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:54:44,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:44,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 450 transitions, 6728 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) [2024-06-21 15:54:44,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:44,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:44,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:45,507 INFO L124 PetriNetUnfolderBase]: 3060/5178 cut-off events. [2024-06-21 15:54:45,507 INFO L125 PetriNetUnfolderBase]: For 935885/935885 co-relation queries the response was YES. [2024-06-21 15:54:45,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41201 conditions, 5178 events. 3060/5178 cut-off events. For 935885/935885 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34651 event pairs, 762 based on Foata normal form. 2/5164 useless extension candidates. Maximal degree in co-relation 41022. Up to 4131 conditions per place. [2024-06-21 15:54:45,586 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 209 changer transitions 0/466 dead transitions. [2024-06-21 15:54:45,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 466 transitions, 7920 flow [2024-06-21 15:54:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:54:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:54:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 15:54:45,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:54:45,587 INFO L175 Difference]: Start difference. First operand has 381 places, 450 transitions, 6728 flow. Second operand 8 states and 192 transitions. [2024-06-21 15:54:45,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 466 transitions, 7920 flow [2024-06-21 15:54:49,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 466 transitions, 7220 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-21 15:54:49,610 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 6453 flow [2024-06-21 15:54:49,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6028, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6453, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-21 15:54:49,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-21 15:54:49,610 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 6453 flow [2024-06-21 15:54:49,610 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) [2024-06-21 15:54:49,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:49,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:49,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 15:54:49,611 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)] === [2024-06-21 15:54:49,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash -36375597, now seen corresponding path program 21 times [2024-06-21 15:54:49,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:49,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418667311] [2024-06-21 15:54:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:49,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:49,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418667311] [2024-06-21 15:54:49,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418667311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:49,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:49,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:54:49,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022603978] [2024-06-21 15:54:49,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:49,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:54:49,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:49,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:54:49,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:54:49,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:49,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 6453 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) [2024-06-21 15:54:49,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:49,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:49,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:50,650 INFO L124 PetriNetUnfolderBase]: 3054/5196 cut-off events. [2024-06-21 15:54:50,650 INFO L125 PetriNetUnfolderBase]: For 930137/930137 co-relation queries the response was YES. [2024-06-21 15:54:50,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40737 conditions, 5196 events. 3054/5196 cut-off events. For 930137/930137 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34825 event pairs, 639 based on Foata normal form. 2/5195 useless extension candidates. Maximal degree in co-relation 40559. Up to 4380 conditions per place. [2024-06-21 15:54:50,728 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 342 selfloop transitions, 133 changer transitions 0/483 dead transitions. [2024-06-21 15:54:50,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 483 transitions, 8205 flow [2024-06-21 15:54:50,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:54:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:54:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 15:54:50,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-21 15:54:50,729 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 6453 flow. Second operand 8 states and 213 transitions. [2024-06-21 15:54:50,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 483 transitions, 8205 flow [2024-06-21 15:54:54,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 483 transitions, 7708 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 15:54:54,454 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 6237 flow [2024-06-21 15:54:54,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6237, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-21 15:54:54,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-21 15:54:54,454 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 6237 flow [2024-06-21 15:54:54,454 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) [2024-06-21 15:54:54,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:54,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:54,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 15:54:54,455 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)] === [2024-06-21 15:54:54,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:54,455 INFO L85 PathProgramCache]: Analyzing trace with hash 220124913, now seen corresponding path program 22 times [2024-06-21 15:54:54,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:54,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609573433] [2024-06-21 15:54:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:54,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:54,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:54,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609573433] [2024-06-21 15:54:54,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609573433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:54,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:54,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:54:54,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474956131] [2024-06-21 15:54:54,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:54,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:54:54,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:54:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:54:54,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:54,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 6237 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) [2024-06-21 15:54:54,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:54,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:54,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:55,588 INFO L124 PetriNetUnfolderBase]: 3048/5175 cut-off events. [2024-06-21 15:54:55,588 INFO L125 PetriNetUnfolderBase]: For 927641/927641 co-relation queries the response was YES. [2024-06-21 15:54:55,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40319 conditions, 5175 events. 3048/5175 cut-off events. For 927641/927641 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34686 event pairs, 657 based on Foata normal form. 2/5171 useless extension candidates. Maximal degree in co-relation 40140. Up to 4375 conditions per place. [2024-06-21 15:54:55,659 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 349 selfloop transitions, 117 changer transitions 0/474 dead transitions. [2024-06-21 15:54:55,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 474 transitions, 7471 flow [2024-06-21 15:54:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:54:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:54:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 15:54:55,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 15:54:55,660 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 6237 flow. Second operand 7 states and 183 transitions. [2024-06-21 15:54:55,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 474 transitions, 7471 flow [2024-06-21 15:54:59,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 474 transitions, 7174 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 15:54:59,565 INFO L231 Difference]: Finished difference. Result has 377 places, 450 transitions, 6189 flow [2024-06-21 15:54:59,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5944, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6189, PETRI_PLACES=377, PETRI_TRANSITIONS=450} [2024-06-21 15:54:59,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-21 15:54:59,565 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 450 transitions, 6189 flow [2024-06-21 15:54:59,565 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) [2024-06-21 15:54:59,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:59,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:59,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 15:54:59,566 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)] === [2024-06-21 15:54:59,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:59,566 INFO L85 PathProgramCache]: Analyzing trace with hash -36582987, now seen corresponding path program 23 times [2024-06-21 15:54:59,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:59,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258417727] [2024-06-21 15:54:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:59,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:59,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:59,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258417727] [2024-06-21 15:54:59,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258417727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:59,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:59,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:54:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008101909] [2024-06-21 15:54:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:59,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:54:59,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:54:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:54:59,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:54:59,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 450 transitions, 6189 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) [2024-06-21 15:54:59,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:59,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:54:59,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:00,676 INFO L124 PetriNetUnfolderBase]: 3042/5167 cut-off events. [2024-06-21 15:55:00,676 INFO L125 PetriNetUnfolderBase]: For 898642/898642 co-relation queries the response was YES. [2024-06-21 15:55:00,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39894 conditions, 5167 events. 3042/5167 cut-off events. For 898642/898642 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34677 event pairs, 657 based on Foata normal form. 2/5163 useless extension candidates. Maximal degree in co-relation 39716. Up to 4370 conditions per place. [2024-06-21 15:55:00,760 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 352 selfloop transitions, 118 changer transitions 0/478 dead transitions. [2024-06-21 15:55:00,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 478 transitions, 7439 flow [2024-06-21 15:55:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:55:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:55:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 15:55:00,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-21 15:55:00,761 INFO L175 Difference]: Start difference. First operand has 377 places, 450 transitions, 6189 flow. Second operand 8 states and 207 transitions. [2024-06-21 15:55:00,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 478 transitions, 7439 flow [2024-06-21 15:55:04,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 478 transitions, 6955 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 15:55:04,599 INFO L231 Difference]: Finished difference. Result has 374 places, 450 transitions, 5954 flow [2024-06-21 15:55:04,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5707, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5954, PETRI_PLACES=374, PETRI_TRANSITIONS=450} [2024-06-21 15:55:04,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-21 15:55:04,599 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 450 transitions, 5954 flow [2024-06-21 15:55:04,599 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) [2024-06-21 15:55:04,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:04,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:04,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 15:55:04,600 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)] === [2024-06-21 15:55:04,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:04,600 INFO L85 PathProgramCache]: Analyzing trace with hash 18982899, now seen corresponding path program 24 times [2024-06-21 15:55:04,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:04,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834379065] [2024-06-21 15:55:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:04,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:04,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:04,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834379065] [2024-06-21 15:55:04,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834379065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:04,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:04,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:55:04,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344068013] [2024-06-21 15:55:04,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:04,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:55:04,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:04,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:55:04,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:55:04,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:04,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 450 transitions, 5954 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) [2024-06-21 15:55:04,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:04,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:04,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:05,724 INFO L124 PetriNetUnfolderBase]: 3036/5168 cut-off events. [2024-06-21 15:55:05,724 INFO L125 PetriNetUnfolderBase]: For 880535/880535 co-relation queries the response was YES. [2024-06-21 15:55:05,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39470 conditions, 5168 events. 3036/5168 cut-off events. For 880535/880535 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34621 event pairs, 637 based on Foata normal form. 2/5167 useless extension candidates. Maximal degree in co-relation 39293. Up to 4365 conditions per place. [2024-06-21 15:55:05,798 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 129 changer transitions 0/485 dead transitions. [2024-06-21 15:55:05,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 485 transitions, 7236 flow [2024-06-21 15:55:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:55:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:55:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-21 15:55:05,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6368563685636857 [2024-06-21 15:55:05,799 INFO L175 Difference]: Start difference. First operand has 374 places, 450 transitions, 5954 flow. Second operand 9 states and 235 transitions. [2024-06-21 15:55:05,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 485 transitions, 7236 flow [2024-06-21 15:55:09,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 485 transitions, 7034 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 15:55:09,331 INFO L231 Difference]: Finished difference. Result has 376 places, 450 transitions, 6027 flow [2024-06-21 15:55:09,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5754, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6027, PETRI_PLACES=376, PETRI_TRANSITIONS=450} [2024-06-21 15:55:09,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-21 15:55:09,332 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 450 transitions, 6027 flow [2024-06-21 15:55:09,332 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) [2024-06-21 15:55:09,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:09,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:09,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 15:55:09,332 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)] === [2024-06-21 15:55:09,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:09,333 INFO L85 PathProgramCache]: Analyzing trace with hash 696849013, now seen corresponding path program 5 times [2024-06-21 15:55:09,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:09,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520539222] [2024-06-21 15:55:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:09,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:09,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520539222] [2024-06-21 15:55:09,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520539222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:09,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:09,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:55:09,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839693760] [2024-06-21 15:55:09,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:09,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:55:09,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:09,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:55:09,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:55:09,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:09,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 450 transitions, 6027 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) [2024-06-21 15:55:09,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:09,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:09,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:10,423 INFO L124 PetriNetUnfolderBase]: 3044/5167 cut-off events. [2024-06-21 15:55:10,424 INFO L125 PetriNetUnfolderBase]: For 884056/884056 co-relation queries the response was YES. [2024-06-21 15:55:10,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39654 conditions, 5167 events. 3044/5167 cut-off events. For 884056/884056 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34661 event pairs, 688 based on Foata normal form. 2/5161 useless extension candidates. Maximal degree in co-relation 39477. Up to 4469 conditions per place. [2024-06-21 15:55:10,503 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 103 changer transitions 0/471 dead transitions. [2024-06-21 15:55:10,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 471 transitions, 7050 flow [2024-06-21 15:55:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:55:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:55:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 15:55:10,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 15:55:10,504 INFO L175 Difference]: Start difference. First operand has 376 places, 450 transitions, 6027 flow. Second operand 8 states and 188 transitions. [2024-06-21 15:55:10,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 471 transitions, 7050 flow [2024-06-21 15:55:14,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 471 transitions, 6731 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 15:55:14,543 INFO L231 Difference]: Finished difference. Result has 373 places, 452 transitions, 5974 flow [2024-06-21 15:55:14,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5708, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5974, PETRI_PLACES=373, PETRI_TRANSITIONS=452} [2024-06-21 15:55:14,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-21 15:55:14,543 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 452 transitions, 5974 flow [2024-06-21 15:55:14,543 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) [2024-06-21 15:55:14,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:14,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:14,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 15:55:14,543 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)] === [2024-06-21 15:55:14,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1762495345, now seen corresponding path program 6 times [2024-06-21 15:55:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:14,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183894783] [2024-06-21 15:55:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:14,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:14,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183894783] [2024-06-21 15:55:14,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183894783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:14,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:14,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:55:14,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35611157] [2024-06-21 15:55:14,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:14,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:55:14,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:14,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:55:14,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:55:14,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:14,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 452 transitions, 5974 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) [2024-06-21 15:55:14,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:14,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:14,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:15,638 INFO L124 PetriNetUnfolderBase]: 3229/5509 cut-off events. [2024-06-21 15:55:15,638 INFO L125 PetriNetUnfolderBase]: For 1087712/1087718 co-relation queries the response was YES. [2024-06-21 15:55:15,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45233 conditions, 5509 events. 3229/5509 cut-off events. For 1087712/1087718 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 37519 event pairs, 750 based on Foata normal form. 6/5506 useless extension candidates. Maximal degree in co-relation 45057. Up to 4549 conditions per place. [2024-06-21 15:55:15,719 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 371 selfloop transitions, 107 changer transitions 0/486 dead transitions. [2024-06-21 15:55:15,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 486 transitions, 7432 flow [2024-06-21 15:55:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:55:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:55:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:55:15,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 15:55:15,720 INFO L175 Difference]: Start difference. First operand has 373 places, 452 transitions, 5974 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:55:15,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 486 transitions, 7432 flow [2024-06-21 15:55:19,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 486 transitions, 7199 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 15:55:19,555 INFO L231 Difference]: Finished difference. Result has 376 places, 460 transitions, 6180 flow [2024-06-21 15:55:19,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5741, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6180, PETRI_PLACES=376, PETRI_TRANSITIONS=460} [2024-06-21 15:55:19,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-21 15:55:19,556 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 460 transitions, 6180 flow [2024-06-21 15:55:19,556 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) [2024-06-21 15:55:19,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:19,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:19,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 15:55:19,557 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)] === [2024-06-21 15:55:19,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1951530191, now seen corresponding path program 7 times [2024-06-21 15:55:19,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:19,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012073815] [2024-06-21 15:55:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:19,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:19,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:19,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012073815] [2024-06-21 15:55:19,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012073815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:19,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:19,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:55:19,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648969458] [2024-06-21 15:55:19,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:19,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:55:19,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:19,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:55:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:55:19,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:19,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 460 transitions, 6180 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) [2024-06-21 15:55:19,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:19,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:19,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:20,628 INFO L124 PetriNetUnfolderBase]: 3237/5528 cut-off events. [2024-06-21 15:55:20,628 INFO L125 PetriNetUnfolderBase]: For 1106521/1106527 co-relation queries the response was YES. [2024-06-21 15:55:20,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45819 conditions, 5528 events. 3237/5528 cut-off events. For 1106521/1106527 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37711 event pairs, 759 based on Foata normal form. 6/5527 useless extension candidates. Maximal degree in co-relation 45641. Up to 4760 conditions per place. [2024-06-21 15:55:20,707 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 372 selfloop transitions, 100 changer transitions 0/480 dead transitions. [2024-06-21 15:55:20,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 480 transitions, 7219 flow [2024-06-21 15:55:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:55:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:55:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 15:55:20,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-21 15:55:20,708 INFO L175 Difference]: Start difference. First operand has 376 places, 460 transitions, 6180 flow. Second operand 7 states and 169 transitions. [2024-06-21 15:55:20,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 480 transitions, 7219 flow [2024-06-21 15:55:25,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 480 transitions, 6964 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 15:55:25,545 INFO L231 Difference]: Finished difference. Result has 379 places, 462 transitions, 6185 flow [2024-06-21 15:55:25,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5933, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6185, PETRI_PLACES=379, PETRI_TRANSITIONS=462} [2024-06-21 15:55:25,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-21 15:55:25,545 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 462 transitions, 6185 flow [2024-06-21 15:55:25,545 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) [2024-06-21 15:55:25,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:25,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:25,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 15:55:25,546 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)] === [2024-06-21 15:55:25,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash 326020347, now seen corresponding path program 8 times [2024-06-21 15:55:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:25,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713337677] [2024-06-21 15:55:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:25,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:25,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713337677] [2024-06-21 15:55:25,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713337677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:25,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:25,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:55:25,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034081421] [2024-06-21 15:55:25,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:25,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:55:25,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:55:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:55:25,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:25,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 462 transitions, 6185 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) [2024-06-21 15:55:25,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:25,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:25,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:26,653 INFO L124 PetriNetUnfolderBase]: 3245/5554 cut-off events. [2024-06-21 15:55:26,653 INFO L125 PetriNetUnfolderBase]: For 1122566/1122572 co-relation queries the response was YES. [2024-06-21 15:55:26,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45798 conditions, 5554 events. 3245/5554 cut-off events. For 1122566/1122572 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37842 event pairs, 604 based on Foata normal form. 6/5553 useless extension candidates. Maximal degree in co-relation 45619. Up to 3373 conditions per place. [2024-06-21 15:55:26,734 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 354 selfloop transitions, 133 changer transitions 0/495 dead transitions. [2024-06-21 15:55:26,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 495 transitions, 7788 flow [2024-06-21 15:55:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:55:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:55:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 15:55:26,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 15:55:26,735 INFO L175 Difference]: Start difference. First operand has 379 places, 462 transitions, 6185 flow. Second operand 7 states and 181 transitions. [2024-06-21 15:55:26,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 495 transitions, 7788 flow [2024-06-21 15:55:31,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 495 transitions, 7569 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 15:55:31,527 INFO L231 Difference]: Finished difference. Result has 382 places, 464 transitions, 6282 flow [2024-06-21 15:55:31,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5966, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6282, PETRI_PLACES=382, PETRI_TRANSITIONS=464} [2024-06-21 15:55:31,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-21 15:55:31,527 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 464 transitions, 6282 flow [2024-06-21 15:55:31,527 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) [2024-06-21 15:55:31,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:31,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:31,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 15:55:31,528 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)] === [2024-06-21 15:55:31,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1380146383, now seen corresponding path program 9 times [2024-06-21 15:55:31,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:31,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252355887] [2024-06-21 15:55:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:31,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:31,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:31,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252355887] [2024-06-21 15:55:31,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252355887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:31,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:31,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:55:31,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926987677] [2024-06-21 15:55:31,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:31,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:55:31,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:31,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:55:31,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:55:31,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:31,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 464 transitions, 6282 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) [2024-06-21 15:55:31,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:31,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:31,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:32,793 INFO L124 PetriNetUnfolderBase]: 3220/5502 cut-off events. [2024-06-21 15:55:32,793 INFO L125 PetriNetUnfolderBase]: For 1129442/1129448 co-relation queries the response was YES. [2024-06-21 15:55:32,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45300 conditions, 5502 events. 3220/5502 cut-off events. For 1129442/1129448 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37480 event pairs, 669 based on Foata normal form. 12/5507 useless extension candidates. Maximal degree in co-relation 45120. Up to 3359 conditions per place. [2024-06-21 15:55:32,866 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 364 selfloop transitions, 120 changer transitions 0/492 dead transitions. [2024-06-21 15:55:32,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 492 transitions, 7592 flow [2024-06-21 15:55:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:55:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:55:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:55:32,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:55:32,867 INFO L175 Difference]: Start difference. First operand has 382 places, 464 transitions, 6282 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:55:32,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 492 transitions, 7592 flow [2024-06-21 15:55:37,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 492 transitions, 7224 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 15:55:37,398 INFO L231 Difference]: Finished difference. Result has 383 places, 464 transitions, 6160 flow [2024-06-21 15:55:37,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5914, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6160, PETRI_PLACES=383, PETRI_TRANSITIONS=464} [2024-06-21 15:55:37,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-21 15:55:37,398 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 464 transitions, 6160 flow [2024-06-21 15:55:37,398 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) [2024-06-21 15:55:37,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:37,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:37,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 15:55:37,399 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)] === [2024-06-21 15:55:37,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:37,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1355868977, now seen corresponding path program 10 times [2024-06-21 15:55:37,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:37,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241256931] [2024-06-21 15:55:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:37,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:37,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:37,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241256931] [2024-06-21 15:55:37,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241256931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:37,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:37,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:55:37,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329258394] [2024-06-21 15:55:37,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:37,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:55:37,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:37,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:55:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:55:37,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:37,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 464 transitions, 6160 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) [2024-06-21 15:55:37,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:37,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:37,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:38,481 INFO L124 PetriNetUnfolderBase]: 3197/5470 cut-off events. [2024-06-21 15:55:38,481 INFO L125 PetriNetUnfolderBase]: For 1083210/1083216 co-relation queries the response was YES. [2024-06-21 15:55:38,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43313 conditions, 5470 events. 3197/5470 cut-off events. For 1083210/1083216 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37333 event pairs, 741 based on Foata normal form. 14/5477 useless extension candidates. Maximal degree in co-relation 43134. Up to 4668 conditions per place. [2024-06-21 15:55:38,563 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 382 selfloop transitions, 92 changer transitions 0/482 dead transitions. [2024-06-21 15:55:38,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 482 transitions, 7164 flow [2024-06-21 15:55:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:55:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:55:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 15:55:38,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 15:55:38,564 INFO L175 Difference]: Start difference. First operand has 383 places, 464 transitions, 6160 flow. Second operand 7 states and 170 transitions. [2024-06-21 15:55:38,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 482 transitions, 7164 flow [2024-06-21 15:55:42,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 482 transitions, 6906 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:55:42,993 INFO L231 Difference]: Finished difference. Result has 384 places, 464 transitions, 6092 flow [2024-06-21 15:55:42,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5902, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6092, PETRI_PLACES=384, PETRI_TRANSITIONS=464} [2024-06-21 15:55:42,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-21 15:55:42,993 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 464 transitions, 6092 flow [2024-06-21 15:55:42,993 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) [2024-06-21 15:55:42,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:42,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:42,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 15:55:42,994 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)] === [2024-06-21 15:55:42,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1322053933, now seen corresponding path program 11 times [2024-06-21 15:55:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:42,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407652976] [2024-06-21 15:55:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:43,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407652976] [2024-06-21 15:55:43,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407652976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:43,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:43,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:55:43,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145997738] [2024-06-21 15:55:43,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:43,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:55:43,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:55:43,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:55:43,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:43,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 464 transitions, 6092 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) [2024-06-21 15:55:43,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:43,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:43,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:44,064 INFO L124 PetriNetUnfolderBase]: 3167/5420 cut-off events. [2024-06-21 15:55:44,064 INFO L125 PetriNetUnfolderBase]: For 1019579/1019585 co-relation queries the response was YES. [2024-06-21 15:55:44,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41451 conditions, 5420 events. 3167/5420 cut-off events. For 1019579/1019585 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37001 event pairs, 711 based on Foata normal form. 14/5427 useless extension candidates. Maximal degree in co-relation 41271. Up to 4416 conditions per place. [2024-06-21 15:55:44,140 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 381 selfloop transitions, 97 changer transitions 0/486 dead transitions. [2024-06-21 15:55:44,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 486 transitions, 7126 flow [2024-06-21 15:55:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:55:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:55:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:55:44,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:55:44,141 INFO L175 Difference]: Start difference. First operand has 384 places, 464 transitions, 6092 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:55:44,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 486 transitions, 7126 flow [2024-06-21 15:55:48,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 486 transitions, 6904 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 15:55:48,535 INFO L231 Difference]: Finished difference. Result has 386 places, 464 transitions, 6071 flow [2024-06-21 15:55:48,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6071, PETRI_PLACES=386, PETRI_TRANSITIONS=464} [2024-06-21 15:55:48,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-21 15:55:48,535 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 464 transitions, 6071 flow [2024-06-21 15:55:48,535 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) [2024-06-21 15:55:48,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:48,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:48,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 15:55:48,536 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)] === [2024-06-21 15:55:48,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash -774155373, now seen corresponding path program 12 times [2024-06-21 15:55:48,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:48,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268483544] [2024-06-21 15:55:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:48,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:48,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:48,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268483544] [2024-06-21 15:55:48,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268483544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:48,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:48,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:55:48,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255813786] [2024-06-21 15:55:48,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:48,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:55:48,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:48,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:55:48,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:55:48,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:48,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 464 transitions, 6071 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) [2024-06-21 15:55:48,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:48,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:48,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:49,632 INFO L124 PetriNetUnfolderBase]: 3144/5381 cut-off events. [2024-06-21 15:55:49,632 INFO L125 PetriNetUnfolderBase]: For 955759/955759 co-relation queries the response was YES. [2024-06-21 15:55:49,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39869 conditions, 5381 events. 3144/5381 cut-off events. For 955759/955759 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36726 event pairs, 720 based on Foata normal form. 10/5383 useless extension candidates. Maximal degree in co-relation 39688. Up to 4589 conditions per place. [2024-06-21 15:55:49,716 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 103 changer transitions 0/485 dead transitions. [2024-06-21 15:55:49,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 485 transitions, 7087 flow [2024-06-21 15:55:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:55:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:55:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 15:55:49,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-21 15:55:49,717 INFO L175 Difference]: Start difference. First operand has 386 places, 464 transitions, 6071 flow. Second operand 10 states and 231 transitions. [2024-06-21 15:55:49,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 485 transitions, 7087 flow [2024-06-21 15:55:53,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 485 transitions, 6878 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 15:55:53,600 INFO L231 Difference]: Finished difference. Result has 390 places, 464 transitions, 6074 flow [2024-06-21 15:55:53,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6074, PETRI_PLACES=390, PETRI_TRANSITIONS=464} [2024-06-21 15:55:53,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-21 15:55:53,600 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 464 transitions, 6074 flow [2024-06-21 15:55:53,600 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) [2024-06-21 15:55:53,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:53,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:53,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 15:55:53,600 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)] === [2024-06-21 15:55:53,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash 412705397, now seen corresponding path program 13 times [2024-06-21 15:55:53,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:53,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626029956] [2024-06-21 15:55:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:53,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:53,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:53,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626029956] [2024-06-21 15:55:53,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626029956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:53,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:53,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:55:53,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697725274] [2024-06-21 15:55:53,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:53,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:55:53,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:53,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:55:53,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:55:53,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:53,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 464 transitions, 6074 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) [2024-06-21 15:55:53,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:53,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:53,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:54,653 INFO L124 PetriNetUnfolderBase]: 3121/5348 cut-off events. [2024-06-21 15:55:54,653 INFO L125 PetriNetUnfolderBase]: For 890110/890110 co-relation queries the response was YES. [2024-06-21 15:55:54,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38447 conditions, 5348 events. 3121/5348 cut-off events. For 890110/890110 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36450 event pairs, 711 based on Foata normal form. 10/5350 useless extension candidates. Maximal degree in co-relation 38265. Up to 4556 conditions per place. [2024-06-21 15:55:54,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 99 changer transitions 0/483 dead transitions. [2024-06-21 15:55:54,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 483 transitions, 7082 flow [2024-06-21 15:55:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:55:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:55:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 15:55:54,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 15:55:54,731 INFO L175 Difference]: Start difference. First operand has 390 places, 464 transitions, 6074 flow. Second operand 8 states and 191 transitions. [2024-06-21 15:55:54,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 483 transitions, 7082 flow [2024-06-21 15:55:59,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 483 transitions, 6848 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 15:55:59,034 INFO L231 Difference]: Finished difference. Result has 390 places, 464 transitions, 6044 flow [2024-06-21 15:55:59,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5840, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6044, PETRI_PLACES=390, PETRI_TRANSITIONS=464} [2024-06-21 15:55:59,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-21 15:55:59,034 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 464 transitions, 6044 flow [2024-06-21 15:55:59,034 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) [2024-06-21 15:55:59,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:59,035 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] [2024-06-21 15:55:59,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 15:55:59,035 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)] === [2024-06-21 15:55:59,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash 413031827, now seen corresponding path program 14 times [2024-06-21 15:55:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:59,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112330401] [2024-06-21 15:55:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:59,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:59,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112330401] [2024-06-21 15:55:59,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112330401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:59,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:59,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:55:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329864841] [2024-06-21 15:55:59,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:59,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:55:59,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:55:59,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:55:59,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:55:59,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 464 transitions, 6044 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) [2024-06-21 15:55:59,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:59,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:55:59,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:00,092 INFO L124 PetriNetUnfolderBase]: 3091/5300 cut-off events. [2024-06-21 15:56:00,092 INFO L125 PetriNetUnfolderBase]: For 820510/820510 co-relation queries the response was YES. [2024-06-21 15:56:00,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36771 conditions, 5300 events. 3091/5300 cut-off events. For 820510/820510 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36138 event pairs, 681 based on Foata normal form. 10/5302 useless extension candidates. Maximal degree in co-relation 36588. Up to 4182 conditions per place. [2024-06-21 15:56:00,173 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 106 changer transitions 0/487 dead transitions. [2024-06-21 15:56:00,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 487 transitions, 7082 flow [2024-06-21 15:56:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 15:56:00,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 15:56:00,174 INFO L175 Difference]: Start difference. First operand has 390 places, 464 transitions, 6044 flow. Second operand 8 states and 194 transitions. [2024-06-21 15:56:00,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 487 transitions, 7082 flow [2024-06-21 15:56:04,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 487 transitions, 6844 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:04,406 INFO L231 Difference]: Finished difference. Result has 392 places, 464 transitions, 6026 flow [2024-06-21 15:56:04,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5806, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6026, PETRI_PLACES=392, PETRI_TRANSITIONS=464} [2024-06-21 15:56:04,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-21 15:56:04,407 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 464 transitions, 6026 flow [2024-06-21 15:56:04,407 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) [2024-06-21 15:56:04,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:04,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:04,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 15:56:04,408 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)] === [2024-06-21 15:56:04,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash 575289485, now seen corresponding path program 1 times [2024-06-21 15:56:04,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:04,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116077170] [2024-06-21 15:56:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:04,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:04,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:04,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116077170] [2024-06-21 15:56:04,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116077170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:04,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:04,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:04,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272734252] [2024-06-21 15:56:04,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:04,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:04,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:04,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:04,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:04,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:04,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 464 transitions, 6026 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) [2024-06-21 15:56:04,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:04,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:04,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:05,419 INFO L124 PetriNetUnfolderBase]: 3099/5307 cut-off events. [2024-06-21 15:56:05,419 INFO L125 PetriNetUnfolderBase]: For 769248/769248 co-relation queries the response was YES. [2024-06-21 15:56:05,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36820 conditions, 5307 events. 3099/5307 cut-off events. For 769248/769248 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 36206 event pairs, 708 based on Foata normal form. 2/5301 useless extension candidates. Maximal degree in co-relation 36636. Up to 4554 conditions per place. [2024-06-21 15:56:05,499 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 98 changer transitions 0/481 dead transitions. [2024-06-21 15:56:05,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 481 transitions, 7074 flow [2024-06-21 15:56:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 15:56:05,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-21 15:56:05,500 INFO L175 Difference]: Start difference. First operand has 392 places, 464 transitions, 6026 flow. Second operand 7 states and 167 transitions. [2024-06-21 15:56:05,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 481 transitions, 7074 flow [2024-06-21 15:56:10,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 481 transitions, 6839 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:56:10,110 INFO L231 Difference]: Finished difference. Result has 392 places, 466 transitions, 6062 flow [2024-06-21 15:56:10,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5791, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6062, PETRI_PLACES=392, PETRI_TRANSITIONS=466} [2024-06-21 15:56:10,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-21 15:56:10,111 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 466 transitions, 6062 flow [2024-06-21 15:56:10,111 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) [2024-06-21 15:56:10,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:10,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:10,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 15:56:10,111 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)] === [2024-06-21 15:56:10,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:10,112 INFO L85 PathProgramCache]: Analyzing trace with hash 590526605, now seen corresponding path program 2 times [2024-06-21 15:56:10,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:10,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387667720] [2024-06-21 15:56:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:10,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:10,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:10,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387667720] [2024-06-21 15:56:10,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387667720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:10,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:10,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:10,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644037532] [2024-06-21 15:56:10,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:10,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:10,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:10,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:10,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:10,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 466 transitions, 6062 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) [2024-06-21 15:56:10,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:10,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:10,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:11,260 INFO L124 PetriNetUnfolderBase]: 3107/5315 cut-off events. [2024-06-21 15:56:11,260 INFO L125 PetriNetUnfolderBase]: For 781313/781313 co-relation queries the response was YES. [2024-06-21 15:56:11,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36948 conditions, 5315 events. 3107/5315 cut-off events. For 781313/781313 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 36221 event pairs, 702 based on Foata normal form. 2/5309 useless extension candidates. Maximal degree in co-relation 36763. Up to 4546 conditions per place. [2024-06-21 15:56:11,330 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 376 selfloop transitions, 100 changer transitions 0/484 dead transitions. [2024-06-21 15:56:11,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 484 transitions, 7122 flow [2024-06-21 15:56:11,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 15:56:11,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-21 15:56:11,331 INFO L175 Difference]: Start difference. First operand has 392 places, 466 transitions, 6062 flow. Second operand 7 states and 167 transitions. [2024-06-21 15:56:11,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 484 transitions, 7122 flow [2024-06-21 15:56:15,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 484 transitions, 6867 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:15,803 INFO L231 Difference]: Finished difference. Result has 394 places, 468 transitions, 6086 flow [2024-06-21 15:56:15,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6086, PETRI_PLACES=394, PETRI_TRANSITIONS=468} [2024-06-21 15:56:15,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-21 15:56:15,804 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 468 transitions, 6086 flow [2024-06-21 15:56:15,804 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) [2024-06-21 15:56:15,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:15,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:15,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 15:56:15,804 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)] === [2024-06-21 15:56:15,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:15,805 INFO L85 PathProgramCache]: Analyzing trace with hash -36367661, now seen corresponding path program 15 times [2024-06-21 15:56:15,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:15,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130108486] [2024-06-21 15:56:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:15,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:15,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:15,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130108486] [2024-06-21 15:56:15,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130108486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:15,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:15,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:15,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702337066] [2024-06-21 15:56:15,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:15,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:15,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:15,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:15,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:15,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:15,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 468 transitions, 6086 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) [2024-06-21 15:56:15,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:15,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:15,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:16,884 INFO L124 PetriNetUnfolderBase]: 3084/5299 cut-off events. [2024-06-21 15:56:16,884 INFO L125 PetriNetUnfolderBase]: For 776408/776408 co-relation queries the response was YES. [2024-06-21 15:56:16,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35489 conditions, 5299 events. 3084/5299 cut-off events. For 776408/776408 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 36221 event pairs, 640 based on Foata normal form. 10/5304 useless extension candidates. Maximal degree in co-relation 35303. Up to 4423 conditions per place. [2024-06-21 15:56:16,961 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 91 changer transitions 0/504 dead transitions. [2024-06-21 15:56:16,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 504 transitions, 7190 flow [2024-06-21 15:56:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 15:56:16,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-21 15:56:16,962 INFO L175 Difference]: Start difference. First operand has 394 places, 468 transitions, 6086 flow. Second operand 8 states and 213 transitions. [2024-06-21 15:56:16,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 504 transitions, 7190 flow [2024-06-21 15:56:20,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 504 transitions, 6905 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:20,496 INFO L231 Difference]: Finished difference. Result has 397 places, 468 transitions, 5998 flow [2024-06-21 15:56:20,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5998, PETRI_PLACES=397, PETRI_TRANSITIONS=468} [2024-06-21 15:56:20,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-21 15:56:20,497 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 468 transitions, 5998 flow [2024-06-21 15:56:20,497 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) [2024-06-21 15:56:20,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:20,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:20,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 15:56:20,498 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)] === [2024-06-21 15:56:20,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:20,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1320492997, now seen corresponding path program 16 times [2024-06-21 15:56:20,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:20,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825863414] [2024-06-21 15:56:20,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:20,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:20,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:20,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825863414] [2024-06-21 15:56:20,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825863414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:20,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:20,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:20,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137963497] [2024-06-21 15:56:20,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:20,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:20,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:20,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:20,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 468 transitions, 5998 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) [2024-06-21 15:56:20,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:20,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:20,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:21,638 INFO L124 PetriNetUnfolderBase]: 3061/5259 cut-off events. [2024-06-21 15:56:21,638 INFO L125 PetriNetUnfolderBase]: For 698657/698657 co-relation queries the response was YES. [2024-06-21 15:56:21,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33790 conditions, 5259 events. 3061/5259 cut-off events. For 698657/698657 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35980 event pairs, 655 based on Foata normal form. 10/5263 useless extension candidates. Maximal degree in co-relation 33603. Up to 4488 conditions per place. [2024-06-21 15:56:21,714 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 409 selfloop transitions, 78 changer transitions 0/495 dead transitions. [2024-06-21 15:56:21,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 495 transitions, 7052 flow [2024-06-21 15:56:21,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 15:56:21,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-21 15:56:21,715 INFO L175 Difference]: Start difference. First operand has 397 places, 468 transitions, 5998 flow. Second operand 7 states and 184 transitions. [2024-06-21 15:56:21,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 495 transitions, 7052 flow [2024-06-21 15:56:25,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 495 transitions, 6854 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 15:56:25,865 INFO L231 Difference]: Finished difference. Result has 397 places, 468 transitions, 5965 flow [2024-06-21 15:56:25,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5965, PETRI_PLACES=397, PETRI_TRANSITIONS=468} [2024-06-21 15:56:25,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-21 15:56:25,866 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 468 transitions, 5965 flow [2024-06-21 15:56:25,866 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) [2024-06-21 15:56:25,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:25,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:25,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 15:56:25,866 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)] === [2024-06-21 15:56:25,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:25,866 INFO L85 PathProgramCache]: Analyzing trace with hash 229656049, now seen corresponding path program 17 times [2024-06-21 15:56:25,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:25,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021424010] [2024-06-21 15:56:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:25,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:25,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:25,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021424010] [2024-06-21 15:56:25,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021424010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:25,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:25,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:25,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360488887] [2024-06-21 15:56:25,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:25,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:25,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:25,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:25,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 468 transitions, 5965 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) [2024-06-21 15:56:25,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:25,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:25,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:26,900 INFO L124 PetriNetUnfolderBase]: 3031/5226 cut-off events. [2024-06-21 15:56:26,900 INFO L125 PetriNetUnfolderBase]: For 602688/602688 co-relation queries the response was YES. [2024-06-21 15:56:26,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31979 conditions, 5226 events. 3031/5226 cut-off events. For 602688/602688 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35843 event pairs, 542 based on Foata normal form. 10/5230 useless extension candidates. Maximal degree in co-relation 31792. Up to 3973 conditions per place. [2024-06-21 15:56:26,972 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 403 selfloop transitions, 90 changer transitions 0/501 dead transitions. [2024-06-21 15:56:26,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 501 transitions, 7067 flow [2024-06-21 15:56:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 15:56:26,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 15:56:26,973 INFO L175 Difference]: Start difference. First operand has 397 places, 468 transitions, 5965 flow. Second operand 7 states and 189 transitions. [2024-06-21 15:56:26,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 501 transitions, 7067 flow [2024-06-21 15:56:30,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 501 transitions, 6878 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:30,610 INFO L231 Difference]: Finished difference. Result has 398 places, 468 transitions, 5967 flow [2024-06-21 15:56:30,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5967, PETRI_PLACES=398, PETRI_TRANSITIONS=468} [2024-06-21 15:56:30,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-21 15:56:30,610 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 468 transitions, 5967 flow [2024-06-21 15:56:30,610 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) [2024-06-21 15:56:30,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:30,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:30,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 15:56:30,611 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)] === [2024-06-21 15:56:30,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:30,611 INFO L85 PathProgramCache]: Analyzing trace with hash 391913707, now seen corresponding path program 3 times [2024-06-21 15:56:30,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:30,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263404480] [2024-06-21 15:56:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:30,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:30,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263404480] [2024-06-21 15:56:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263404480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:30,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:30,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:30,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216167059] [2024-06-21 15:56:30,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:30,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:30,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:30,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:30,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:30,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 468 transitions, 5967 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) [2024-06-21 15:56:30,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:30,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:30,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:31,667 INFO L124 PetriNetUnfolderBase]: 3039/5242 cut-off events. [2024-06-21 15:56:31,667 INFO L125 PetriNetUnfolderBase]: For 544082/544082 co-relation queries the response was YES. [2024-06-21 15:56:31,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32238 conditions, 5242 events. 3039/5242 cut-off events. For 544082/544082 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36008 event pairs, 652 based on Foata normal form. 2/5238 useless extension candidates. Maximal degree in co-relation 32050. Up to 4504 conditions per place. [2024-06-21 15:56:31,745 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 407 selfloop transitions, 76 changer transitions 0/491 dead transitions. [2024-06-21 15:56:31,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 491 transitions, 7059 flow [2024-06-21 15:56:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:56:31,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 15:56:31,746 INFO L175 Difference]: Start difference. First operand has 398 places, 468 transitions, 5967 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:56:31,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 491 transitions, 7059 flow [2024-06-21 15:56:34,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 491 transitions, 6770 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 15:56:34,953 INFO L231 Difference]: Finished difference. Result has 397 places, 470 transitions, 5913 flow [2024-06-21 15:56:34,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5678, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5913, PETRI_PLACES=397, PETRI_TRANSITIONS=470} [2024-06-21 15:56:34,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-21 15:56:34,954 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 470 transitions, 5913 flow [2024-06-21 15:56:34,954 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) [2024-06-21 15:56:34,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:34,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 15:56:34,954 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)] === [2024-06-21 15:56:34,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash 407150827, now seen corresponding path program 4 times [2024-06-21 15:56:34,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:34,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506117843] [2024-06-21 15:56:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:34,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:35,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:35,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506117843] [2024-06-21 15:56:35,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506117843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:35,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:35,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:35,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229994075] [2024-06-21 15:56:35,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:35,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:35,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:35,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:35,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:35,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 470 transitions, 5913 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) [2024-06-21 15:56:35,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:35,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:35,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:35,980 INFO L124 PetriNetUnfolderBase]: 3093/5324 cut-off events. [2024-06-21 15:56:35,980 INFO L125 PetriNetUnfolderBase]: For 625683/625683 co-relation queries the response was YES. [2024-06-21 15:56:36,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33947 conditions, 5324 events. 3093/5324 cut-off events. For 625683/625683 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36554 event pairs, 662 based on Foata normal form. 2/5320 useless extension candidates. Maximal degree in co-relation 33758. Up to 4456 conditions per place. [2024-06-21 15:56:36,057 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 408 selfloop transitions, 83 changer transitions 0/499 dead transitions. [2024-06-21 15:56:36,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 499 transitions, 7385 flow [2024-06-21 15:56:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 15:56:36,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 15:56:36,059 INFO L175 Difference]: Start difference. First operand has 397 places, 470 transitions, 5913 flow. Second operand 7 states and 181 transitions. [2024-06-21 15:56:36,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 499 transitions, 7385 flow [2024-06-21 15:56:39,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 499 transitions, 7166 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:39,746 INFO L231 Difference]: Finished difference. Result has 399 places, 474 transitions, 6026 flow [2024-06-21 15:56:39,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5694, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6026, PETRI_PLACES=399, PETRI_TRANSITIONS=474} [2024-06-21 15:56:39,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-21 15:56:39,747 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 474 transitions, 6026 flow [2024-06-21 15:56:39,747 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) [2024-06-21 15:56:39,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:39,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:39,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 15:56:39,747 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)] === [2024-06-21 15:56:39,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:39,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1313440177, now seen corresponding path program 5 times [2024-06-21 15:56:39,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:39,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835175689] [2024-06-21 15:56:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:39,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:39,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:39,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835175689] [2024-06-21 15:56:39,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835175689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:39,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:39,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:39,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335144337] [2024-06-21 15:56:39,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:39,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:39,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:39,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:39,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:39,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 474 transitions, 6026 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) [2024-06-21 15:56:39,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:39,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:39,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:40,790 INFO L124 PetriNetUnfolderBase]: 3088/5328 cut-off events. [2024-06-21 15:56:40,790 INFO L125 PetriNetUnfolderBase]: For 617023/617023 co-relation queries the response was YES. [2024-06-21 15:56:40,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33691 conditions, 5328 events. 3088/5328 cut-off events. For 617023/617023 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36607 event pairs, 645 based on Foata normal form. 2/5325 useless extension candidates. Maximal degree in co-relation 33501. Up to 4531 conditions per place. [2024-06-21 15:56:40,865 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 412 selfloop transitions, 87 changer transitions 1/508 dead transitions. [2024-06-21 15:56:40,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 508 transitions, 7170 flow [2024-06-21 15:56:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 15:56:40,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-21 15:56:40,866 INFO L175 Difference]: Start difference. First operand has 399 places, 474 transitions, 6026 flow. Second operand 8 states and 211 transitions. [2024-06-21 15:56:40,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 508 transitions, 7170 flow [2024-06-21 15:56:44,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 508 transitions, 6998 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:44,926 INFO L231 Difference]: Finished difference. Result has 404 places, 475 transitions, 6093 flow [2024-06-21 15:56:44,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6093, PETRI_PLACES=404, PETRI_TRANSITIONS=475} [2024-06-21 15:56:44,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-21 15:56:44,927 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 475 transitions, 6093 flow [2024-06-21 15:56:44,927 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) [2024-06-21 15:56:44,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:44,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:44,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 15:56:44,927 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)] === [2024-06-21 15:56:44,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1685829625, now seen corresponding path program 6 times [2024-06-21 15:56:44,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:44,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715617649] [2024-06-21 15:56:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:44,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:45,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:45,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715617649] [2024-06-21 15:56:45,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715617649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:45,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:45,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:45,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262941733] [2024-06-21 15:56:45,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:45,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:45,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:45,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 475 transitions, 6093 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) [2024-06-21 15:56:45,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:45,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:45,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:46,071 INFO L124 PetriNetUnfolderBase]: 3129/5387 cut-off events. [2024-06-21 15:56:46,071 INFO L125 PetriNetUnfolderBase]: For 680432/680432 co-relation queries the response was YES. [2024-06-21 15:56:46,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35198 conditions, 5387 events. 3129/5387 cut-off events. For 680432/680432 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 37051 event pairs, 520 based on Foata normal form. 2/5384 useless extension candidates. Maximal degree in co-relation 35006. Up to 3981 conditions per place. [2024-06-21 15:56:46,156 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 105 changer transitions 1/519 dead transitions. [2024-06-21 15:56:46,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 519 transitions, 7634 flow [2024-06-21 15:56:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 15:56:46,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6615853658536586 [2024-06-21 15:56:46,157 INFO L175 Difference]: Start difference. First operand has 404 places, 475 transitions, 6093 flow. Second operand 8 states and 217 transitions. [2024-06-21 15:56:46,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 519 transitions, 7634 flow [2024-06-21 15:56:50,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 519 transitions, 7407 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:50,556 INFO L231 Difference]: Finished difference. Result has 407 places, 479 transitions, 6254 flow [2024-06-21 15:56:50,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6254, PETRI_PLACES=407, PETRI_TRANSITIONS=479} [2024-06-21 15:56:50,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-21 15:56:50,557 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 479 transitions, 6254 flow [2024-06-21 15:56:50,557 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) [2024-06-21 15:56:50,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:50,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:50,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 15:56:50,557 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)] === [2024-06-21 15:56:50,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:50,558 INFO L85 PathProgramCache]: Analyzing trace with hash 17018219, now seen corresponding path program 7 times [2024-06-21 15:56:50,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:50,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618603034] [2024-06-21 15:56:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:50,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:50,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:50,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618603034] [2024-06-21 15:56:50,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618603034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:50,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:50,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155260482] [2024-06-21 15:56:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:50,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:50,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 479 transitions, 6254 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) [2024-06-21 15:56:50,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:50,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:50,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:51,757 INFO L124 PetriNetUnfolderBase]: 3284/5665 cut-off events. [2024-06-21 15:56:51,758 INFO L125 PetriNetUnfolderBase]: For 972017/972017 co-relation queries the response was YES. [2024-06-21 15:56:51,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41307 conditions, 5665 events. 3284/5665 cut-off events. For 972017/972017 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 39171 event pairs, 545 based on Foata normal form. 2/5661 useless extension candidates. Maximal degree in co-relation 41113. Up to 3408 conditions per place. [2024-06-21 15:56:51,849 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 102 changer transitions 0/517 dead transitions. [2024-06-21 15:56:51,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 517 transitions, 8131 flow [2024-06-21 15:56:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 15:56:51,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-21 15:56:51,850 INFO L175 Difference]: Start difference. First operand has 407 places, 479 transitions, 6254 flow. Second operand 7 states and 188 transitions. [2024-06-21 15:56:51,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 517 transitions, 8131 flow [2024-06-21 15:56:57,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 517 transitions, 7951 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:57,613 INFO L231 Difference]: Finished difference. Result has 411 places, 485 transitions, 6564 flow [2024-06-21 15:56:57,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6564, PETRI_PLACES=411, PETRI_TRANSITIONS=485} [2024-06-21 15:56:57,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-21 15:56:57,614 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 485 transitions, 6564 flow [2024-06-21 15:56:57,614 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) [2024-06-21 15:56:57,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:57,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:57,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 15:56:57,615 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)] === [2024-06-21 15:56:57,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash 16838729, now seen corresponding path program 8 times [2024-06-21 15:56:57,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:57,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041011791] [2024-06-21 15:56:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:57,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041011791] [2024-06-21 15:56:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041011791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:57,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:57,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:57,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784010849] [2024-06-21 15:56:57,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:57,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:57,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 485 transitions, 6564 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) [2024-06-21 15:56:57,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:57,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:57,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:58,938 INFO L124 PetriNetUnfolderBase]: 3279/5658 cut-off events. [2024-06-21 15:56:58,938 INFO L125 PetriNetUnfolderBase]: For 970139/970139 co-relation queries the response was YES. [2024-06-21 15:56:58,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41793 conditions, 5658 events. 3279/5658 cut-off events. For 970139/970139 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 39167 event pairs, 533 based on Foata normal form. 2/5654 useless extension candidates. Maximal degree in co-relation 41596. Up to 3406 conditions per place. [2024-06-21 15:56:59,016 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 407 selfloop transitions, 104 changer transitions 0/519 dead transitions. [2024-06-21 15:56:59,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 519 transitions, 8301 flow [2024-06-21 15:56:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 15:56:59,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 15:56:59,017 INFO L175 Difference]: Start difference. First operand has 411 places, 485 transitions, 6564 flow. Second operand 7 states and 189 transitions. [2024-06-21 15:56:59,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 519 transitions, 8301 flow [2024-06-21 15:57:04,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 519 transitions, 8127 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:04,898 INFO L231 Difference]: Finished difference. Result has 416 places, 486 transitions, 6662 flow [2024-06-21 15:57:04,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6396, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6662, PETRI_PLACES=416, PETRI_TRANSITIONS=486} [2024-06-21 15:57:04,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-21 15:57:04,899 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 486 transitions, 6662 flow [2024-06-21 15:57:04,899 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) [2024-06-21 15:57:04,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:04,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:04,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 15:57:04,899 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)] === [2024-06-21 15:57:04,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:04,900 INFO L85 PathProgramCache]: Analyzing trace with hash -163897715, now seen corresponding path program 1 times [2024-06-21 15:57:04,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:04,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275373422] [2024-06-21 15:57:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:04,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:04,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:04,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275373422] [2024-06-21 15:57:04,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275373422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:04,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:04,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:04,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131877959] [2024-06-21 15:57:04,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:04,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:04,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:05,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:05,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 486 transitions, 6662 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) [2024-06-21 15:57:05,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:05,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:05,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:06,314 INFO L124 PetriNetUnfolderBase]: 3359/5772 cut-off events. [2024-06-21 15:57:06,315 INFO L125 PetriNetUnfolderBase]: For 1099344/1099344 co-relation queries the response was YES. [2024-06-21 15:57:06,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44964 conditions, 5772 events. 3359/5772 cut-off events. For 1099344/1099344 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39940 event pairs, 610 based on Foata normal form. 2/5758 useless extension candidates. Maximal degree in co-relation 44765. Up to 4524 conditions per place. [2024-06-21 15:57:06,414 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 49 changer transitions 4/538 dead transitions. [2024-06-21 15:57:06,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 538 transitions, 8654 flow [2024-06-21 15:57:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-21 15:57:06,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 15:57:06,415 INFO L175 Difference]: Start difference. First operand has 416 places, 486 transitions, 6662 flow. Second operand 9 states and 231 transitions. [2024-06-21 15:57:06,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 538 transitions, 8654 flow [2024-06-21 15:57:11,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 538 transitions, 8280 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:11,928 INFO L231 Difference]: Finished difference. Result has 420 places, 491 transitions, 6590 flow [2024-06-21 15:57:11,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6590, PETRI_PLACES=420, PETRI_TRANSITIONS=491} [2024-06-21 15:57:11,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-21 15:57:11,929 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 491 transitions, 6590 flow [2024-06-21 15:57:11,929 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) [2024-06-21 15:57:11,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:11,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:11,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 15:57:11,930 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)] === [2024-06-21 15:57:11,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2056444241, now seen corresponding path program 2 times [2024-06-21 15:57:11,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:11,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468138287] [2024-06-21 15:57:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:11,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:12,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:12,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468138287] [2024-06-21 15:57:12,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468138287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:12,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:12,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:12,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112876883] [2024-06-21 15:57:12,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:12,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:12,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:12,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:12,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 491 transitions, 6590 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) [2024-06-21 15:57:12,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:12,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:12,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:13,354 INFO L124 PetriNetUnfolderBase]: 3387/5821 cut-off events. [2024-06-21 15:57:13,354 INFO L125 PetriNetUnfolderBase]: For 1146462/1146462 co-relation queries the response was YES. [2024-06-21 15:57:13,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45078 conditions, 5821 events. 3387/5821 cut-off events. For 1146462/1146462 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 40363 event pairs, 638 based on Foata normal form. 2/5820 useless extension candidates. Maximal degree in co-relation 44879. Up to 5107 conditions per place. [2024-06-21 15:57:13,446 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 489 selfloop transitions, 30 changer transitions 2/529 dead transitions. [2024-06-21 15:57:13,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 529 transitions, 8038 flow [2024-06-21 15:57:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 15:57:13,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:57:13,447 INFO L175 Difference]: Start difference. First operand has 420 places, 491 transitions, 6590 flow. Second operand 9 states and 216 transitions. [2024-06-21 15:57:13,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 529 transitions, 8038 flow [2024-06-21 15:57:20,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 529 transitions, 7848 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:20,736 INFO L231 Difference]: Finished difference. Result has 427 places, 492 transitions, 6497 flow [2024-06-21 15:57:20,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6497, PETRI_PLACES=427, PETRI_TRANSITIONS=492} [2024-06-21 15:57:20,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-21 15:57:20,737 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 492 transitions, 6497 flow [2024-06-21 15:57:20,737 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) [2024-06-21 15:57:20,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:20,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:20,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 15:57:20,738 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)] === [2024-06-21 15:57:20,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:20,738 INFO L85 PathProgramCache]: Analyzing trace with hash 501301585, now seen corresponding path program 3 times [2024-06-21 15:57:20,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:20,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794793017] [2024-06-21 15:57:20,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:20,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:20,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:20,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794793017] [2024-06-21 15:57:20,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794793017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:20,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:20,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:20,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13836029] [2024-06-21 15:57:20,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:20,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:20,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:20,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:20,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:20,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:20,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 492 transitions, 6497 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) [2024-06-21 15:57:20,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:20,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:20,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:22,459 INFO L124 PetriNetUnfolderBase]: 3395/5839 cut-off events. [2024-06-21 15:57:22,459 INFO L125 PetriNetUnfolderBase]: For 1165733/1165733 co-relation queries the response was YES. [2024-06-21 15:57:22,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45056 conditions, 5839 events. 3395/5839 cut-off events. For 1165733/1165733 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 40496 event pairs, 810 based on Foata normal form. 2/5836 useless extension candidates. Maximal degree in co-relation 44854. Up to 5131 conditions per place. [2024-06-21 15:57:22,543 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 481 selfloop transitions, 44 changer transitions 2/535 dead transitions. [2024-06-21 15:57:22,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 535 transitions, 8095 flow [2024-06-21 15:57:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-21 15:57:22,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-21 15:57:22,544 INFO L175 Difference]: Start difference. First operand has 427 places, 492 transitions, 6497 flow. Second operand 9 states and 223 transitions. [2024-06-21 15:57:22,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 535 transitions, 8095 flow [2024-06-21 15:57:28,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 535 transitions, 7974 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 15:57:28,769 INFO L231 Difference]: Finished difference. Result has 427 places, 496 transitions, 6633 flow [2024-06-21 15:57:28,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6633, PETRI_PLACES=427, PETRI_TRANSITIONS=496} [2024-06-21 15:57:28,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-21 15:57:28,770 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 496 transitions, 6633 flow [2024-06-21 15:57:28,770 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) [2024-06-21 15:57:28,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:28,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:28,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 15:57:28,770 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)] === [2024-06-21 15:57:28,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:28,770 INFO L85 PathProgramCache]: Analyzing trace with hash -130475539, now seen corresponding path program 4 times [2024-06-21 15:57:28,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:28,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14409845] [2024-06-21 15:57:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:28,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:28,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:28,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14409845] [2024-06-21 15:57:28,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14409845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:28,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:28,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:28,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925610869] [2024-06-21 15:57:28,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:28,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:28,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:28,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:28,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:28,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:28,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 496 transitions, 6633 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) [2024-06-21 15:57:28,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:28,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:28,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:30,442 INFO L124 PetriNetUnfolderBase]: 3390/5834 cut-off events. [2024-06-21 15:57:30,442 INFO L125 PetriNetUnfolderBase]: For 1162179/1162179 co-relation queries the response was YES. [2024-06-21 15:57:30,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44668 conditions, 5834 events. 3390/5834 cut-off events. For 1162179/1162179 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 40390 event pairs, 813 based on Foata normal form. 2/5833 useless extension candidates. Maximal degree in co-relation 44465. Up to 5183 conditions per place. [2024-06-21 15:57:30,525 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 480 selfloop transitions, 40 changer transitions 0/528 dead transitions. [2024-06-21 15:57:30,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 528 transitions, 7753 flow [2024-06-21 15:57:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 15:57:30,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-21 15:57:30,526 INFO L175 Difference]: Start difference. First operand has 427 places, 496 transitions, 6633 flow. Second operand 9 states and 215 transitions. [2024-06-21 15:57:30,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 528 transitions, 7753 flow [2024-06-21 15:57:38,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 528 transitions, 7568 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:38,062 INFO L231 Difference]: Finished difference. Result has 431 places, 496 transitions, 6533 flow [2024-06-21 15:57:38,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6448, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6533, PETRI_PLACES=431, PETRI_TRANSITIONS=496} [2024-06-21 15:57:38,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-21 15:57:38,062 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 496 transitions, 6533 flow [2024-06-21 15:57:38,063 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) [2024-06-21 15:57:38,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:38,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:38,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 15:57:38,063 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)] === [2024-06-21 15:57:38,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash -134189494, now seen corresponding path program 1 times [2024-06-21 15:57:38,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:38,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666791557] [2024-06-21 15:57:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:38,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:38,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666791557] [2024-06-21 15:57:38,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666791557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:38,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:38,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061599156] [2024-06-21 15:57:38,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:38,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:38,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:38,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:38,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 496 transitions, 6533 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:38,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:38,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:38,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:39,601 INFO L124 PetriNetUnfolderBase]: 3387/5821 cut-off events. [2024-06-21 15:57:39,601 INFO L125 PetriNetUnfolderBase]: For 1155405/1155405 co-relation queries the response was YES. [2024-06-21 15:57:39,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44436 conditions, 5821 events. 3387/5821 cut-off events. For 1155405/1155405 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 40332 event pairs, 832 based on Foata normal form. 1/5816 useless extension candidates. Maximal degree in co-relation 44231. Up to 4943 conditions per place. [2024-06-21 15:57:39,681 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 125 changer transitions 0/514 dead transitions. [2024-06-21 15:57:39,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 514 transitions, 7871 flow [2024-06-21 15:57:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:57:39,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:57:39,682 INFO L175 Difference]: Start difference. First operand has 431 places, 496 transitions, 6533 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:57:39,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 514 transitions, 7871 flow [2024-06-21 15:57:48,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 514 transitions, 7771 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 15:57:48,333 INFO L231 Difference]: Finished difference. Result has 430 places, 496 transitions, 6697 flow [2024-06-21 15:57:48,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6697, PETRI_PLACES=430, PETRI_TRANSITIONS=496} [2024-06-21 15:57:48,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-21 15:57:48,333 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 496 transitions, 6697 flow [2024-06-21 15:57:48,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:48,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:48,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 15:57:48,334 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)] === [2024-06-21 15:57:48,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash 819146104, now seen corresponding path program 2 times [2024-06-21 15:57:48,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:48,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217080903] [2024-06-21 15:57:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:48,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217080903] [2024-06-21 15:57:48,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217080903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:48,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:48,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707802047] [2024-06-21 15:57:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:48,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:48,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:48,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:48,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 496 transitions, 6697 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:48,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:48,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:48,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:49,970 INFO L124 PetriNetUnfolderBase]: 3392/5830 cut-off events. [2024-06-21 15:57:49,971 INFO L125 PetriNetUnfolderBase]: For 1172129/1172129 co-relation queries the response was YES. [2024-06-21 15:57:50,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44799 conditions, 5830 events. 3392/5830 cut-off events. For 1172129/1172129 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 40435 event pairs, 832 based on Foata normal form. 1/5825 useless extension candidates. Maximal degree in co-relation 44593. Up to 4949 conditions per place. [2024-06-21 15:57:50,069 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 376 selfloop transitions, 136 changer transitions 0/520 dead transitions. [2024-06-21 15:57:50,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 520 transitions, 8100 flow [2024-06-21 15:57:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:57:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:57:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-21 15:57:50,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-21 15:57:50,071 INFO L175 Difference]: Start difference. First operand has 430 places, 496 transitions, 6697 flow. Second operand 10 states and 242 transitions. [2024-06-21 15:57:50,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 520 transitions, 8100 flow [2024-06-21 15:57:56,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 520 transitions, 7830 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:56,998 INFO L231 Difference]: Finished difference. Result has 434 places, 499 transitions, 6757 flow [2024-06-21 15:57:56,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6757, PETRI_PLACES=434, PETRI_TRANSITIONS=499} [2024-06-21 15:57:56,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-21 15:57:56,998 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 499 transitions, 6757 flow [2024-06-21 15:57:56,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:56,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:56,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:56,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 15:57:56,999 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)] === [2024-06-21 15:57:56,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash 819140524, now seen corresponding path program 3 times [2024-06-21 15:57:57,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:57,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025661168] [2024-06-21 15:57:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:57,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:57,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025661168] [2024-06-21 15:57:57,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025661168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:57,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:57,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:57,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536016311] [2024-06-21 15:57:57,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:57,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:57,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:57,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:57,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 499 transitions, 6757 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:57,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:57,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:57,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:58,608 INFO L124 PetriNetUnfolderBase]: 3389/5826 cut-off events. [2024-06-21 15:57:58,609 INFO L125 PetriNetUnfolderBase]: For 1161824/1161824 co-relation queries the response was YES. [2024-06-21 15:57:58,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44664 conditions, 5826 events. 3389/5826 cut-off events. For 1161824/1161824 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 40444 event pairs, 832 based on Foata normal form. 1/5821 useless extension candidates. Maximal degree in co-relation 44458. Up to 4946 conditions per place. [2024-06-21 15:57:58,688 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 129 changer transitions 0/517 dead transitions. [2024-06-21 15:57:58,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 517 transitions, 7819 flow [2024-06-21 15:57:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 15:57:58,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 15:57:58,689 INFO L175 Difference]: Start difference. First operand has 434 places, 499 transitions, 6757 flow. Second operand 8 states and 199 transitions. [2024-06-21 15:57:58,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 517 transitions, 7819 flow [2024-06-21 15:58:05,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 517 transitions, 7486 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 15:58:05,020 INFO L231 Difference]: Finished difference. Result has 432 places, 499 transitions, 6697 flow [2024-06-21 15:58:05,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6697, PETRI_PLACES=432, PETRI_TRANSITIONS=499} [2024-06-21 15:58:05,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-21 15:58:05,020 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 499 transitions, 6697 flow [2024-06-21 15:58:05,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:05,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:05,021 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, 1] [2024-06-21 15:58:05,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 15:58:05,021 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)] === [2024-06-21 15:58:05,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash -703518179, now seen corresponding path program 5 times [2024-06-21 15:58:05,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:05,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153967501] [2024-06-21 15:58:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:05,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:05,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:05,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153967501] [2024-06-21 15:58:05,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153967501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:05,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:05,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:05,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88732316] [2024-06-21 15:58:05,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:05,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:05,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:05,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:05,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:05,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 499 transitions, 6697 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) [2024-06-21 15:58:05,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:05,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:05,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:06,660 INFO L124 PetriNetUnfolderBase]: 3456/5919 cut-off events. [2024-06-21 15:58:06,660 INFO L125 PetriNetUnfolderBase]: For 1285070/1285070 co-relation queries the response was YES. [2024-06-21 15:58:06,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47390 conditions, 5919 events. 3456/5919 cut-off events. For 1285070/1285070 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 40896 event pairs, 862 based on Foata normal form. 2/5903 useless extension candidates. Maximal degree in co-relation 47184. Up to 4679 conditions per place. [2024-06-21 15:58:06,745 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 275 selfloop transitions, 254 changer transitions 0/537 dead transitions. [2024-06-21 15:58:06,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 537 transitions, 8597 flow [2024-06-21 15:58:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 15:58:06,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-21 15:58:06,746 INFO L175 Difference]: Start difference. First operand has 432 places, 499 transitions, 6697 flow. Second operand 8 states and 210 transitions. [2024-06-21 15:58:06,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 537 transitions, 8597 flow [2024-06-21 15:58:13,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 537 transitions, 8324 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 15:58:13,443 INFO L231 Difference]: Finished difference. Result has 432 places, 503 transitions, 7117 flow [2024-06-21 15:58:13,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6428, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7117, PETRI_PLACES=432, PETRI_TRANSITIONS=503} [2024-06-21 15:58:13,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-21 15:58:13,444 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 503 transitions, 7117 flow [2024-06-21 15:58:13,444 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) [2024-06-21 15:58:13,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:13,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:13,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 15:58:13,444 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)] === [2024-06-21 15:58:13,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash -99045039, now seen corresponding path program 6 times [2024-06-21 15:58:13,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:13,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656478058] [2024-06-21 15:58:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:13,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:13,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:13,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656478058] [2024-06-21 15:58:13,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656478058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:13,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:13,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004788885] [2024-06-21 15:58:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:13,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:13,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:13,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:13,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:13,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 503 transitions, 7117 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) [2024-06-21 15:58:13,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:13,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:13,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:15,023 INFO L124 PetriNetUnfolderBase]: 3464/5936 cut-off events. [2024-06-21 15:58:15,023 INFO L125 PetriNetUnfolderBase]: For 1287755/1287755 co-relation queries the response was YES. [2024-06-21 15:58:15,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47993 conditions, 5936 events. 3464/5936 cut-off events. For 1287755/1287755 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 41049 event pairs, 869 based on Foata normal form. 2/5920 useless extension candidates. Maximal degree in co-relation 47787. Up to 4776 conditions per place. [2024-06-21 15:58:15,121 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 251 changer transitions 0/531 dead transitions. [2024-06-21 15:58:15,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 531 transitions, 8601 flow [2024-06-21 15:58:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 15:58:15,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 15:58:15,122 INFO L175 Difference]: Start difference. First operand has 432 places, 503 transitions, 7117 flow. Second operand 8 states and 202 transitions. [2024-06-21 15:58:15,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 531 transitions, 8601 flow [2024-06-21 15:58:23,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 531 transitions, 7949 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:23,546 INFO L231 Difference]: Finished difference. Result has 434 places, 505 transitions, 7066 flow [2024-06-21 15:58:23,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7066, PETRI_PLACES=434, PETRI_TRANSITIONS=505} [2024-06-21 15:58:23,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-21 15:58:23,547 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 505 transitions, 7066 flow [2024-06-21 15:58:23,547 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) [2024-06-21 15:58:23,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:23,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:23,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 15:58:23,547 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)] === [2024-06-21 15:58:23,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1393755535, now seen corresponding path program 7 times [2024-06-21 15:58:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:23,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90744097] [2024-06-21 15:58:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:23,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90744097] [2024-06-21 15:58:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90744097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:23,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:23,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:23,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096452639] [2024-06-21 15:58:23,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:23,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:23,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 505 transitions, 7066 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) [2024-06-21 15:58:23,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:23,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:23,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:25,236 INFO L124 PetriNetUnfolderBase]: 3472/5948 cut-off events. [2024-06-21 15:58:25,236 INFO L125 PetriNetUnfolderBase]: For 1299633/1299633 co-relation queries the response was YES. [2024-06-21 15:58:25,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47775 conditions, 5948 events. 3472/5948 cut-off events. For 1299633/1299633 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 41171 event pairs, 869 based on Foata normal form. 2/5932 useless extension candidates. Maximal degree in co-relation 47569. Up to 4788 conditions per place. [2024-06-21 15:58:25,323 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 250 changer transitions 0/530 dead transitions. [2024-06-21 15:58:25,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 530 transitions, 8522 flow [2024-06-21 15:58:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 15:58:25,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 15:58:25,324 INFO L175 Difference]: Start difference. First operand has 434 places, 505 transitions, 7066 flow. Second operand 8 states and 198 transitions. [2024-06-21 15:58:25,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 530 transitions, 8522 flow [2024-06-21 15:58:32,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 530 transitions, 7965 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:32,781 INFO L231 Difference]: Finished difference. Result has 436 places, 507 transitions, 7088 flow [2024-06-21 15:58:32,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6509, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7088, PETRI_PLACES=436, PETRI_TRANSITIONS=507} [2024-06-21 15:58:32,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-21 15:58:32,782 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 507 transitions, 7088 flow [2024-06-21 15:58:32,782 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) [2024-06-21 15:58:32,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:32,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:32,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 15:58:32,782 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)] === [2024-06-21 15:58:32,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1652876651, now seen corresponding path program 8 times [2024-06-21 15:58:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:32,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567776091] [2024-06-21 15:58:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:32,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:32,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567776091] [2024-06-21 15:58:32,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567776091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:32,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:32,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542849537] [2024-06-21 15:58:32,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:32,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:32,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:32,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:32,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:32,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 507 transitions, 7088 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) [2024-06-21 15:58:32,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:32,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:32,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:34,284 INFO L124 PetriNetUnfolderBase]: 3480/5972 cut-off events. [2024-06-21 15:58:34,284 INFO L125 PetriNetUnfolderBase]: For 1317222/1317222 co-relation queries the response was YES. [2024-06-21 15:58:34,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47994 conditions, 5972 events. 3480/5972 cut-off events. For 1317222/1317222 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 41403 event pairs, 827 based on Foata normal form. 2/5971 useless extension candidates. Maximal degree in co-relation 47787. Up to 5337 conditions per place. [2024-06-21 15:58:34,371 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 483 selfloop transitions, 39 changer transitions 0/530 dead transitions. [2024-06-21 15:58:34,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 530 transitions, 8266 flow [2024-06-21 15:58:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:58:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:58:34,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 15:58:34,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-21 15:58:34,372 INFO L175 Difference]: Start difference. First operand has 436 places, 507 transitions, 7088 flow. Second operand 9 states and 206 transitions. [2024-06-21 15:58:34,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 530 transitions, 8266 flow [2024-06-21 15:58:41,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 530 transitions, 7707 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:41,762 INFO L231 Difference]: Finished difference. Result has 439 places, 509 transitions, 6690 flow [2024-06-21 15:58:41,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6690, PETRI_PLACES=439, PETRI_TRANSITIONS=509} [2024-06-21 15:58:41,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-21 15:58:41,762 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 509 transitions, 6690 flow [2024-06-21 15:58:41,763 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) [2024-06-21 15:58:41,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:41,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:41,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 15:58:41,763 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)] === [2024-06-21 15:58:41,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:41,763 INFO L85 PathProgramCache]: Analyzing trace with hash -102758994, now seen corresponding path program 4 times [2024-06-21 15:58:41,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:41,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335271861] [2024-06-21 15:58:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:41,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:41,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335271861] [2024-06-21 15:58:41,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335271861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:41,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:41,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:41,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452270622] [2024-06-21 15:58:41,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:41,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:41,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:41,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:41,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:41,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:41,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 509 transitions, 6690 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:41,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:41,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:41,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:43,292 INFO L124 PetriNetUnfolderBase]: 3501/5980 cut-off events. [2024-06-21 15:58:43,293 INFO L125 PetriNetUnfolderBase]: For 1344244/1344244 co-relation queries the response was YES. [2024-06-21 15:58:43,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47887 conditions, 5980 events. 3501/5980 cut-off events. For 1344244/1344244 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 41414 event pairs, 924 based on Foata normal form. 1/5969 useless extension candidates. Maximal degree in co-relation 47679. Up to 4830 conditions per place. [2024-06-21 15:58:43,594 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 224 changer transitions 0/541 dead transitions. [2024-06-21 15:58:43,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 541 transitions, 8513 flow [2024-06-21 15:58:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 15:58:43,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 15:58:43,596 INFO L175 Difference]: Start difference. First operand has 439 places, 509 transitions, 6690 flow. Second operand 8 states and 197 transitions. [2024-06-21 15:58:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 541 transitions, 8513 flow [2024-06-21 15:58:51,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 541 transitions, 8372 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:51,573 INFO L231 Difference]: Finished difference. Result has 440 places, 518 transitions, 7125 flow [2024-06-21 15:58:51,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6549, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7125, PETRI_PLACES=440, PETRI_TRANSITIONS=518} [2024-06-21 15:58:51,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-21 15:58:51,574 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 518 transitions, 7125 flow [2024-06-21 15:58:51,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:51,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:51,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:51,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 15:58:51,574 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)] === [2024-06-21 15:58:51,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:51,575 INFO L85 PathProgramCache]: Analyzing trace with hash -694936604, now seen corresponding path program 5 times [2024-06-21 15:58:51,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:51,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616182446] [2024-06-21 15:58:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:51,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:51,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:51,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616182446] [2024-06-21 15:58:51,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616182446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:51,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:51,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:51,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99402047] [2024-06-21 15:58:51,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:51,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:51,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:51,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:51,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:51,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:51,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 518 transitions, 7125 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:51,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:51,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:51,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:53,077 INFO L124 PetriNetUnfolderBase]: 3514/5991 cut-off events. [2024-06-21 15:58:53,078 INFO L125 PetriNetUnfolderBase]: For 1374796/1374796 co-relation queries the response was YES. [2024-06-21 15:58:53,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48682 conditions, 5991 events. 3514/5991 cut-off events. For 1374796/1374796 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 41418 event pairs, 946 based on Foata normal form. 1/5976 useless extension candidates. Maximal degree in co-relation 48473. Up to 4845 conditions per place. [2024-06-21 15:58:53,377 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 306 selfloop transitions, 232 changer transitions 0/546 dead transitions. [2024-06-21 15:58:53,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 546 transitions, 8927 flow [2024-06-21 15:58:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:58:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:58:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-21 15:58:53,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 15:58:53,378 INFO L175 Difference]: Start difference. First operand has 440 places, 518 transitions, 7125 flow. Second operand 10 states and 230 transitions. [2024-06-21 15:58:53,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 546 transitions, 8927 flow [2024-06-21 15:59:01,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 546 transitions, 8587 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:01,106 INFO L231 Difference]: Finished difference. Result has 446 places, 524 transitions, 7345 flow [2024-06-21 15:59:01,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6815, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7345, PETRI_PLACES=446, PETRI_TRANSITIONS=524} [2024-06-21 15:59:01,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-21 15:59:01,106 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 524 transitions, 7345 flow [2024-06-21 15:59:01,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:01,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:01,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:01,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 15:59:01,107 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)] === [2024-06-21 15:59:01,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash 376625486, now seen corresponding path program 6 times [2024-06-21 15:59:01,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:01,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427241225] [2024-06-21 15:59:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:01,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:01,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:01,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427241225] [2024-06-21 15:59:01,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427241225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:01,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:01,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:01,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366129052] [2024-06-21 15:59:01,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:01,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:01,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:01,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:01,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 524 transitions, 7345 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:01,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:01,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:01,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:02,580 INFO L124 PetriNetUnfolderBase]: 3519/6030 cut-off events. [2024-06-21 15:59:02,581 INFO L125 PetriNetUnfolderBase]: For 1394989/1394995 co-relation queries the response was YES. [2024-06-21 15:59:02,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48923 conditions, 6030 events. 3519/6030 cut-off events. For 1394989/1394995 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 42028 event pairs, 910 based on Foata normal form. 5/6024 useless extension candidates. Maximal degree in co-relation 48712. Up to 4851 conditions per place. [2024-06-21 15:59:02,669 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 308 selfloop transitions, 230 changer transitions 0/546 dead transitions. [2024-06-21 15:59:02,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 546 transitions, 9103 flow [2024-06-21 15:59:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:59:02,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:59:02,670 INFO L175 Difference]: Start difference. First operand has 446 places, 524 transitions, 7345 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:59:02,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 546 transitions, 9103 flow [2024-06-21 15:59:09,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 546 transitions, 8810 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:09,801 INFO L231 Difference]: Finished difference. Result has 447 places, 527 transitions, 7567 flow [2024-06-21 15:59:09,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7055, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7567, PETRI_PLACES=447, PETRI_TRANSITIONS=527} [2024-06-21 15:59:09,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-21 15:59:09,801 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 527 transitions, 7567 flow [2024-06-21 15:59:09,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:09,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:09,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:09,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 15:59:09,802 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)] === [2024-06-21 15:59:09,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:09,802 INFO L85 PathProgramCache]: Analyzing trace with hash -62411122, now seen corresponding path program 7 times [2024-06-21 15:59:09,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:09,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64406427] [2024-06-21 15:59:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:09,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:09,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:09,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64406427] [2024-06-21 15:59:09,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64406427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:09,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:09,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:09,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853947438] [2024-06-21 15:59:09,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:09,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:09,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:09,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:09,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 527 transitions, 7567 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:09,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:09,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:09,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:11,345 INFO L124 PetriNetUnfolderBase]: 3524/6039 cut-off events. [2024-06-21 15:59:11,345 INFO L125 PetriNetUnfolderBase]: For 1416411/1416417 co-relation queries the response was YES. [2024-06-21 15:59:11,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49180 conditions, 6039 events. 3524/6039 cut-off events. For 1416411/1416417 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 42064 event pairs, 910 based on Foata normal form. 5/6033 useless extension candidates. Maximal degree in co-relation 48967. Up to 4857 conditions per place. [2024-06-21 15:59:11,439 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 311 selfloop transitions, 227 changer transitions 0/546 dead transitions. [2024-06-21 15:59:11,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 546 transitions, 9324 flow [2024-06-21 15:59:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:59:11,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:59:11,440 INFO L175 Difference]: Start difference. First operand has 447 places, 527 transitions, 7567 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:59:11,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 546 transitions, 9324 flow [2024-06-21 15:59:20,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 546 transitions, 8614 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:20,796 INFO L231 Difference]: Finished difference. Result has 446 places, 530 transitions, 7370 flow [2024-06-21 15:59:20,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6875, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7370, PETRI_PLACES=446, PETRI_TRANSITIONS=530} [2024-06-21 15:59:20,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-21 15:59:20,796 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 530 transitions, 7370 flow [2024-06-21 15:59:20,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:20,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:20,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:20,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 15:59:20,797 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)] === [2024-06-21 15:59:20,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:20,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2028145930, now seen corresponding path program 8 times [2024-06-21 15:59:20,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:20,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056032673] [2024-06-21 15:59:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:20,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:20,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056032673] [2024-06-21 15:59:20,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056032673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:20,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:20,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:20,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749940200] [2024-06-21 15:59:20,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:20,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:20,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:20,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 530 transitions, 7370 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:20,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:20,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:20,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:22,328 INFO L124 PetriNetUnfolderBase]: 3521/6005 cut-off events. [2024-06-21 15:59:22,328 INFO L125 PetriNetUnfolderBase]: For 1421884/1421884 co-relation queries the response was YES. [2024-06-21 15:59:22,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48706 conditions, 6005 events. 3521/6005 cut-off events. For 1421884/1421884 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 41641 event pairs, 948 based on Foata normal form. 1/5990 useless extension candidates. Maximal degree in co-relation 48496. Up to 4854 conditions per place. [2024-06-21 15:59:22,417 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 236 changer transitions 0/549 dead transitions. [2024-06-21 15:59:22,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 549 transitions, 8796 flow [2024-06-21 15:59:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 15:59:22,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 15:59:22,418 INFO L175 Difference]: Start difference. First operand has 446 places, 530 transitions, 7370 flow. Second operand 8 states and 193 transitions. [2024-06-21 15:59:22,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 549 transitions, 8796 flow [2024-06-21 15:59:30,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 549 transitions, 8365 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:30,702 INFO L231 Difference]: Finished difference. Result has 450 places, 530 transitions, 7418 flow [2024-06-21 15:59:30,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6939, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7418, PETRI_PLACES=450, PETRI_TRANSITIONS=530} [2024-06-21 15:59:30,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-21 15:59:30,702 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 530 transitions, 7418 flow [2024-06-21 15:59:30,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:30,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:30,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:30,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 15:59:30,703 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)] === [2024-06-21 15:59:30,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:30,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1636215848, now seen corresponding path program 9 times [2024-06-21 15:59:30,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:30,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82693860] [2024-06-21 15:59:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:30,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:30,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:30,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82693860] [2024-06-21 15:59:30,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82693860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:30,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:30,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:30,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764225582] [2024-06-21 15:59:30,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:30,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:30,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:30,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:30,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 530 transitions, 7418 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:30,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:30,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:30,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:32,180 INFO L124 PetriNetUnfolderBase]: 3518/6031 cut-off events. [2024-06-21 15:59:32,180 INFO L125 PetriNetUnfolderBase]: For 1427801/1427807 co-relation queries the response was YES. [2024-06-21 15:59:32,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48756 conditions, 6031 events. 3518/6031 cut-off events. For 1427801/1427807 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 41978 event pairs, 910 based on Foata normal form. 5/6025 useless extension candidates. Maximal degree in co-relation 48545. Up to 4851 conditions per place. [2024-06-21 15:59:32,269 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 303 selfloop transitions, 234 changer transitions 0/545 dead transitions. [2024-06-21 15:59:32,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 545 transitions, 8828 flow [2024-06-21 15:59:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:59:32,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:59:32,270 INFO L175 Difference]: Start difference. First operand has 450 places, 530 transitions, 7418 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:59:32,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 545 transitions, 8828 flow [2024-06-21 15:59:40,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 545 transitions, 8356 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:40,429 INFO L231 Difference]: Finished difference. Result has 450 places, 530 transitions, 7420 flow [2024-06-21 15:59:40,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7420, PETRI_PLACES=450, PETRI_TRANSITIONS=530} [2024-06-21 15:59:40,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-21 15:59:40,430 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 530 transitions, 7420 flow [2024-06-21 15:59:40,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:40,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:40,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:40,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 15:59:40,431 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)] === [2024-06-21 15:59:40,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:40,431 INFO L85 PathProgramCache]: Analyzing trace with hash 852732280, now seen corresponding path program 10 times [2024-06-21 15:59:40,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:40,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095232619] [2024-06-21 15:59:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:40,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:40,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:40,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095232619] [2024-06-21 15:59:40,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095232619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:40,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:40,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833084846] [2024-06-21 15:59:40,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:40,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:40,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:40,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:40,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:40,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:40,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 530 transitions, 7420 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:40,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:40,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:40,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:42,078 INFO L124 PetriNetUnfolderBase]: 3531/6035 cut-off events. [2024-06-21 15:59:42,078 INFO L125 PetriNetUnfolderBase]: For 1458287/1458287 co-relation queries the response was YES. [2024-06-21 15:59:42,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49070 conditions, 6035 events. 3531/6035 cut-off events. For 1458287/1458287 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 41906 event pairs, 922 based on Foata normal form. 1/6020 useless extension candidates. Maximal degree in co-relation 48858. Up to 4866 conditions per place. [2024-06-21 15:59:42,170 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 262 changer transitions 0/556 dead transitions. [2024-06-21 15:59:42,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 556 transitions, 9546 flow [2024-06-21 15:59:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:59:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:59:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-21 15:59:42,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-21 15:59:42,171 INFO L175 Difference]: Start difference. First operand has 450 places, 530 transitions, 7420 flow. Second operand 10 states and 238 transitions. [2024-06-21 15:59:42,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 556 transitions, 9546 flow [2024-06-21 15:59:50,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 556 transitions, 8837 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:50,945 INFO L231 Difference]: Finished difference. Result has 452 places, 536 transitions, 7319 flow [2024-06-21 15:59:50,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6729, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7319, PETRI_PLACES=452, PETRI_TRANSITIONS=536} [2024-06-21 15:59:50,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-21 15:59:50,945 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 536 transitions, 7319 flow [2024-06-21 15:59:50,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:50,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:50,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:50,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 15:59:50,946 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)] === [2024-06-21 15:59:50,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash 969497068, now seen corresponding path program 11 times [2024-06-21 15:59:50,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:50,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62231640] [2024-06-21 15:59:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:50,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:51,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:51,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62231640] [2024-06-21 15:59:51,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62231640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:51,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:51,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:51,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889191875] [2024-06-21 15:59:51,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:51,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:51,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:51,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:51,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:51,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:51,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 536 transitions, 7319 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:51,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:51,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:51,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:52,476 INFO L124 PetriNetUnfolderBase]: 3536/6026 cut-off events. [2024-06-21 15:59:52,476 INFO L125 PetriNetUnfolderBase]: For 1474398/1474398 co-relation queries the response was YES. [2024-06-21 15:59:52,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49125 conditions, 6026 events. 3536/6026 cut-off events. For 1474398/1474398 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 41736 event pairs, 940 based on Foata normal form. 1/6011 useless extension candidates. Maximal degree in co-relation 48912. Up to 4872 conditions per place. [2024-06-21 15:59:52,564 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 246 changer transitions 0/559 dead transitions. [2024-06-21 15:59:52,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 559 transitions, 9415 flow [2024-06-21 15:59:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:59:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:59:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 15:59:52,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-21 15:59:52,565 INFO L175 Difference]: Start difference. First operand has 452 places, 536 transitions, 7319 flow. Second operand 10 states and 231 transitions. [2024-06-21 15:59:52,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 559 transitions, 9415 flow [2024-06-21 16:00:01,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 8355 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 16:00:01,200 INFO L231 Difference]: Finished difference. Result has 452 places, 539 transitions, 6793 flow [2024-06-21 16:00:01,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6793, PETRI_PLACES=452, PETRI_TRANSITIONS=539} [2024-06-21 16:00:01,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-21 16:00:01,200 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 539 transitions, 6793 flow [2024-06-21 16:00:01,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:01,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:01,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:01,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 16:00:01,201 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)] === [2024-06-21 16:00:01,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:01,201 INFO L85 PathProgramCache]: Analyzing trace with hash 969491488, now seen corresponding path program 12 times [2024-06-21 16:00:01,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:01,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057656689] [2024-06-21 16:00:01,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:01,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:01,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:01,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057656689] [2024-06-21 16:00:01,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057656689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:01,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:01,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:01,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46486010] [2024-06-21 16:00:01,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:01,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:01,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:01,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:01,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:01,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:01,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 539 transitions, 6793 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:01,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:01,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:01,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:02,713 INFO L124 PetriNetUnfolderBase]: 3533/6030 cut-off events. [2024-06-21 16:00:02,713 INFO L125 PetriNetUnfolderBase]: For 1473467/1473467 co-relation queries the response was YES. [2024-06-21 16:00:02,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48757 conditions, 6030 events. 3533/6030 cut-off events. For 1473467/1473467 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 41778 event pairs, 948 based on Foata normal form. 1/6015 useless extension candidates. Maximal degree in co-relation 48546. Up to 4869 conditions per place. [2024-06-21 16:00:02,803 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 243 changer transitions 0/556 dead transitions. [2024-06-21 16:00:02,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 556 transitions, 8541 flow [2024-06-21 16:00:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 16:00:02,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:00:02,804 INFO L175 Difference]: Start difference. First operand has 452 places, 539 transitions, 6793 flow. Second operand 8 states and 192 transitions. [2024-06-21 16:00:02,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 556 transitions, 8541 flow [2024-06-21 16:00:11,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 556 transitions, 7888 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:00:11,202 INFO L231 Difference]: Finished difference. Result has 451 places, 539 transitions, 6634 flow [2024-06-21 16:00:11,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6140, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6634, PETRI_PLACES=451, PETRI_TRANSITIONS=539} [2024-06-21 16:00:11,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-21 16:00:11,203 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 539 transitions, 6634 flow [2024-06-21 16:00:11,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:11,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:11,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:11,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 16:00:11,204 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)] === [2024-06-21 16:00:11,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:11,204 INFO L85 PathProgramCache]: Analyzing trace with hash 794067974, now seen corresponding path program 13 times [2024-06-21 16:00:11,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:11,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180038881] [2024-06-21 16:00:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:11,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:11,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:11,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180038881] [2024-06-21 16:00:11,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180038881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:11,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:11,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:11,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881009916] [2024-06-21 16:00:11,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:11,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:11,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:11,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:11,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:11,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 539 transitions, 6634 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:11,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:11,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:11,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:12,704 INFO L124 PetriNetUnfolderBase]: 3530/6021 cut-off events. [2024-06-21 16:00:12,704 INFO L125 PetriNetUnfolderBase]: For 1477839/1477839 co-relation queries the response was YES. [2024-06-21 16:00:12,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48619 conditions, 6021 events. 3530/6021 cut-off events. For 1477839/1477839 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 41713 event pairs, 954 based on Foata normal form. 1/6006 useless extension candidates. Maximal degree in co-relation 48408. Up to 4866 conditions per place. [2024-06-21 16:00:13,009 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 299 selfloop transitions, 248 changer transitions 0/555 dead transitions. [2024-06-21 16:00:13,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 555 transitions, 8074 flow [2024-06-21 16:00:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 16:00:13,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 16:00:13,011 INFO L175 Difference]: Start difference. First operand has 451 places, 539 transitions, 6634 flow. Second operand 8 states and 191 transitions. [2024-06-21 16:00:13,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 555 transitions, 8074 flow [2024-06-21 16:00:20,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 555 transitions, 7588 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:00:20,965 INFO L231 Difference]: Finished difference. Result has 452 places, 539 transitions, 6650 flow [2024-06-21 16:00:20,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6148, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6650, PETRI_PLACES=452, PETRI_TRANSITIONS=539} [2024-06-21 16:00:20,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-21 16:00:20,965 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 539 transitions, 6650 flow [2024-06-21 16:00:20,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:20,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:20,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:20,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 16:00:20,966 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)] === [2024-06-21 16:00:20,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:20,966 INFO L85 PathProgramCache]: Analyzing trace with hash -819229358, now seen corresponding path program 14 times [2024-06-21 16:00:20,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:20,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000368011] [2024-06-21 16:00:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:20,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:21,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:21,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000368011] [2024-06-21 16:00:21,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000368011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:21,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:21,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:21,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853963011] [2024-06-21 16:00:21,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:21,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:21,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:21,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:21,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:21,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:21,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 539 transitions, 6650 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:21,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:21,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:21,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:22,480 INFO L124 PetriNetUnfolderBase]: 3535/6045 cut-off events. [2024-06-21 16:00:22,480 INFO L125 PetriNetUnfolderBase]: For 1496063/1496063 co-relation queries the response was YES. [2024-06-21 16:00:22,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48802 conditions, 6045 events. 3535/6045 cut-off events. For 1496063/1496063 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42058 event pairs, 922 based on Foata normal form. 1/6030 useless extension candidates. Maximal degree in co-relation 48590. Up to 4872 conditions per place. [2024-06-21 16:00:22,785 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 249 changer transitions 0/559 dead transitions. [2024-06-21 16:00:22,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 559 transitions, 8436 flow [2024-06-21 16:00:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 16:00:22,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 16:00:22,787 INFO L175 Difference]: Start difference. First operand has 452 places, 539 transitions, 6650 flow. Second operand 8 states and 194 transitions. [2024-06-21 16:00:22,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 559 transitions, 8436 flow [2024-06-21 16:00:31,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 7900 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:00:31,025 INFO L231 Difference]: Finished difference. Result has 452 places, 542 transitions, 6645 flow [2024-06-21 16:00:31,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6645, PETRI_PLACES=452, PETRI_TRANSITIONS=542} [2024-06-21 16:00:31,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-21 16:00:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 542 transitions, 6645 flow [2024-06-21 16:00:31,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:31,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 16:00:31,026 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)] === [2024-06-21 16:00:31,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:31,026 INFO L85 PathProgramCache]: Analyzing trace with hash 788912984, now seen corresponding path program 15 times [2024-06-21 16:00:31,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:31,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593040219] [2024-06-21 16:00:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:31,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:31,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:31,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593040219] [2024-06-21 16:00:31,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593040219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:31,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:31,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:31,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322906434] [2024-06-21 16:00:31,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:31,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:31,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:31,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:31,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:31,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:31,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 542 transitions, 6645 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:31,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:31,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:31,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:32,730 INFO L124 PetriNetUnfolderBase]: 3532/6041 cut-off events. [2024-06-21 16:00:32,730 INFO L125 PetriNetUnfolderBase]: For 1502526/1502526 co-relation queries the response was YES. [2024-06-21 16:00:32,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48735 conditions, 6041 events. 3532/6041 cut-off events. For 1502526/1502526 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42034 event pairs, 922 based on Foata normal form. 1/6026 useless extension candidates. Maximal degree in co-relation 48522. Up to 4869 conditions per place. [2024-06-21 16:00:32,827 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 294 selfloop transitions, 256 changer transitions 0/558 dead transitions. [2024-06-21 16:00:32,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 558 transitions, 8095 flow [2024-06-21 16:00:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 16:00:32,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 16:00:32,828 INFO L175 Difference]: Start difference. First operand has 452 places, 542 transitions, 6645 flow. Second operand 8 states and 194 transitions. [2024-06-21 16:00:32,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 558 transitions, 8095 flow [2024-06-21 16:00:41,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 558 transitions, 7630 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:41,212 INFO L231 Difference]: Finished difference. Result has 455 places, 542 transitions, 6698 flow [2024-06-21 16:00:41,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6698, PETRI_PLACES=455, PETRI_TRANSITIONS=542} [2024-06-21 16:00:41,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-21 16:00:41,212 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 542 transitions, 6698 flow [2024-06-21 16:00:41,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:41,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:41,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:41,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 16:00:41,213 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)] === [2024-06-21 16:00:41,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash -232825062, now seen corresponding path program 16 times [2024-06-21 16:00:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:41,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666655268] [2024-06-21 16:00:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:41,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:41,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666655268] [2024-06-21 16:00:41,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666655268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:41,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:41,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:41,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798709743] [2024-06-21 16:00:41,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:41,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:41,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:41,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:41,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 542 transitions, 6698 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:41,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:41,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:41,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:42,724 INFO L124 PetriNetUnfolderBase]: 3545/6080 cut-off events. [2024-06-21 16:00:42,725 INFO L125 PetriNetUnfolderBase]: For 1532289/1532289 co-relation queries the response was YES. [2024-06-21 16:00:43,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49153 conditions, 6080 events. 3545/6080 cut-off events. For 1532289/1532289 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42412 event pairs, 845 based on Foata normal form. 1/6075 useless extension candidates. Maximal degree in co-relation 48939. Up to 5145 conditions per place. [2024-06-21 16:00:43,038 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 426 selfloop transitions, 131 changer transitions 0/565 dead transitions. [2024-06-21 16:00:43,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 565 transitions, 8540 flow [2024-06-21 16:00:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 16:00:43,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:00:43,040 INFO L175 Difference]: Start difference. First operand has 455 places, 542 transitions, 6698 flow. Second operand 8 states and 192 transitions. [2024-06-21 16:00:43,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 565 transitions, 8540 flow [2024-06-21 16:00:51,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 565 transitions, 7961 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:00:51,645 INFO L231 Difference]: Finished difference. Result has 455 places, 548 transitions, 6447 flow [2024-06-21 16:00:51,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6447, PETRI_PLACES=455, PETRI_TRANSITIONS=548} [2024-06-21 16:00:51,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-21 16:00:51,645 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 548 transitions, 6447 flow [2024-06-21 16:00:51,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:51,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:51,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:51,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 16:00:51,645 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)] === [2024-06-21 16:00:51,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:51,646 INFO L85 PathProgramCache]: Analyzing trace with hash -233032452, now seen corresponding path program 17 times [2024-06-21 16:00:51,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:51,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094355326] [2024-06-21 16:00:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:51,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:51,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:51,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094355326] [2024-06-21 16:00:51,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094355326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:51,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:51,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:51,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240452183] [2024-06-21 16:00:51,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:51,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:51,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:51,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:51,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:51,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:51,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 548 transitions, 6447 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:51,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:51,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:51,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:53,356 INFO L124 PetriNetUnfolderBase]: 3550/6089 cut-off events. [2024-06-21 16:00:53,357 INFO L125 PetriNetUnfolderBase]: For 1550373/1550373 co-relation queries the response was YES. [2024-06-21 16:00:53,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48937 conditions, 6089 events. 3550/6089 cut-off events. For 1550373/1550373 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42467 event pairs, 845 based on Foata normal form. 1/6084 useless extension candidates. Maximal degree in co-relation 48722. Up to 5151 conditions per place. [2024-06-21 16:00:53,447 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 131 changer transitions 0/568 dead transitions. [2024-06-21 16:00:53,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 568 transitions, 7953 flow [2024-06-21 16:00:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:00:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:00:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 16:00:53,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-21 16:00:53,448 INFO L175 Difference]: Start difference. First operand has 455 places, 548 transitions, 6447 flow. Second operand 9 states and 209 transitions. [2024-06-21 16:00:53,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 568 transitions, 7953 flow [2024-06-21 16:01:01,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 568 transitions, 7746 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:01,732 INFO L231 Difference]: Finished difference. Result has 460 places, 551 transitions, 6538 flow [2024-06-21 16:01:01,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6243, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6538, PETRI_PLACES=460, PETRI_TRANSITIONS=551} [2024-06-21 16:01:01,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-21 16:01:01,733 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 551 transitions, 6538 flow [2024-06-21 16:01:01,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:01,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:01,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:01,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 16:01:01,734 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)] === [2024-06-21 16:01:01,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:01,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1280002040, now seen corresponding path program 18 times [2024-06-21 16:01:01,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:01,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69948945] [2024-06-21 16:01:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:01,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:01,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:01,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69948945] [2024-06-21 16:01:01,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69948945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:01,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:01,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575225512] [2024-06-21 16:01:01,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:01,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:01,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:01,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:01,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 551 transitions, 6538 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:01,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:01,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:01,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:03,388 INFO L124 PetriNetUnfolderBase]: 3555/6090 cut-off events. [2024-06-21 16:01:03,389 INFO L125 PetriNetUnfolderBase]: For 1569948/1569948 co-relation queries the response was YES. [2024-06-21 16:01:03,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49135 conditions, 6090 events. 3555/6090 cut-off events. For 1569948/1569948 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42461 event pairs, 839 based on Foata normal form. 1/6085 useless extension candidates. Maximal degree in co-relation 48919. Up to 5157 conditions per place. [2024-06-21 16:01:03,481 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 137 changer transitions 0/583 dead transitions. [2024-06-21 16:01:03,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 583 transitions, 8745 flow [2024-06-21 16:01:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:01:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:01:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-21 16:01:03,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-21 16:01:03,481 INFO L175 Difference]: Start difference. First operand has 460 places, 551 transitions, 6538 flow. Second operand 10 states and 242 transitions. [2024-06-21 16:01:03,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 583 transitions, 8745 flow [2024-06-21 16:01:12,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 583 transitions, 8477 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:01:12,087 INFO L231 Difference]: Finished difference. Result has 463 places, 554 transitions, 6583 flow [2024-06-21 16:01:12,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6276, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6583, PETRI_PLACES=463, PETRI_TRANSITIONS=554} [2024-06-21 16:01:12,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-21 16:01:12,088 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 554 transitions, 6583 flow [2024-06-21 16:01:12,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:12,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:12,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:12,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 16:01:12,088 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)] === [2024-06-21 16:01:12,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:12,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1279996460, now seen corresponding path program 19 times [2024-06-21 16:01:12,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:12,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540787719] [2024-06-21 16:01:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:12,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:12,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:12,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540787719] [2024-06-21 16:01:12,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540787719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:12,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:12,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:12,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051743334] [2024-06-21 16:01:12,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:12,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:12,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:12,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:12,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 554 transitions, 6583 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:12,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:12,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:12,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:13,665 INFO L124 PetriNetUnfolderBase]: 3552/6094 cut-off events. [2024-06-21 16:01:13,665 INFO L125 PetriNetUnfolderBase]: For 1576085/1576085 co-relation queries the response was YES. [2024-06-21 16:01:13,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49136 conditions, 6094 events. 3552/6094 cut-off events. For 1576085/1576085 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42504 event pairs, 847 based on Foata normal form. 1/6089 useless extension candidates. Maximal degree in co-relation 48919. Up to 5154 conditions per place. [2024-06-21 16:01:13,953 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 134 changer transitions 0/580 dead transitions. [2024-06-21 16:01:13,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 580 transitions, 8431 flow [2024-06-21 16:01:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:01:13,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 16:01:13,954 INFO L175 Difference]: Start difference. First operand has 463 places, 554 transitions, 6583 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:01:13,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 580 transitions, 8431 flow [2024-06-21 16:01:22,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 580 transitions, 8102 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:01:22,860 INFO L231 Difference]: Finished difference. Result has 464 places, 554 transitions, 6530 flow [2024-06-21 16:01:22,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6254, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6530, PETRI_PLACES=464, PETRI_TRANSITIONS=554} [2024-06-21 16:01:22,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-21 16:01:22,860 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 554 transitions, 6530 flow [2024-06-21 16:01:22,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:22,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:22,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:22,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 16:01:22,861 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)] === [2024-06-21 16:01:22,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:22,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1291966490, now seen corresponding path program 20 times [2024-06-21 16:01:22,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:22,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444260646] [2024-06-21 16:01:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:22,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:22,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:22,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444260646] [2024-06-21 16:01:22,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444260646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:22,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:22,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:22,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536680602] [2024-06-21 16:01:22,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:22,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:22,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:22,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 554 transitions, 6530 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:22,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:22,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:22,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:24,579 INFO L124 PetriNetUnfolderBase]: 3549/6082 cut-off events. [2024-06-21 16:01:24,579 INFO L125 PetriNetUnfolderBase]: For 1582591/1582591 co-relation queries the response was YES. [2024-06-21 16:01:24,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49038 conditions, 6082 events. 3549/6082 cut-off events. For 1582591/1582591 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42454 event pairs, 839 based on Foata normal form. 1/6077 useless extension candidates. Maximal degree in co-relation 48820. Up to 5151 conditions per place. [2024-06-21 16:01:24,671 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 133 changer transitions 0/573 dead transitions. [2024-06-21 16:01:24,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 573 transitions, 8028 flow [2024-06-21 16:01:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 16:01:24,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 16:01:24,672 INFO L175 Difference]: Start difference. First operand has 464 places, 554 transitions, 6530 flow. Second operand 8 states and 194 transitions. [2024-06-21 16:01:24,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 573 transitions, 8028 flow [2024-06-21 16:01:33,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 573 transitions, 7760 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:01:33,282 INFO L231 Difference]: Finished difference. Result has 465 places, 554 transitions, 6534 flow [2024-06-21 16:01:33,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6534, PETRI_PLACES=465, PETRI_TRANSITIONS=554} [2024-06-21 16:01:33,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-21 16:01:33,282 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 554 transitions, 6534 flow [2024-06-21 16:01:33,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:33,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:33,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:33,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 16:01:33,283 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)] === [2024-06-21 16:01:33,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1286811500, now seen corresponding path program 21 times [2024-06-21 16:01:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:33,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193087986] [2024-06-21 16:01:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:33,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:33,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193087986] [2024-06-21 16:01:33,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193087986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:33,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:33,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721469850] [2024-06-21 16:01:33,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:33,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:33,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:33,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:33,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:33,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:33,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 554 transitions, 6534 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:33,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:33,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:33,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:34,892 INFO L124 PetriNetUnfolderBase]: 3554/6099 cut-off events. [2024-06-21 16:01:34,892 INFO L125 PetriNetUnfolderBase]: For 1601182/1601182 co-relation queries the response was YES. [2024-06-21 16:01:34,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49192 conditions, 6099 events. 3554/6099 cut-off events. For 1601182/1601182 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42648 event pairs, 847 based on Foata normal form. 1/6094 useless extension candidates. Maximal degree in co-relation 48973. Up to 5157 conditions per place. [2024-06-21 16:01:34,983 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 428 selfloop transitions, 139 changer transitions 0/575 dead transitions. [2024-06-21 16:01:34,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 575 transitions, 8069 flow [2024-06-21 16:01:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 16:01:34,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 16:01:34,985 INFO L175 Difference]: Start difference. First operand has 465 places, 554 transitions, 6534 flow. Second operand 7 states and 175 transitions. [2024-06-21 16:01:34,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 575 transitions, 8069 flow [2024-06-21 16:01:44,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 575 transitions, 7753 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:01:44,509 INFO L231 Difference]: Finished difference. Result has 464 places, 557 transitions, 6535 flow [2024-06-21 16:01:44,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6535, PETRI_PLACES=464, PETRI_TRANSITIONS=557} [2024-06-21 16:01:44,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-21 16:01:44,509 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 557 transitions, 6535 flow [2024-06-21 16:01:44,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:44,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:44,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:44,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 16:01:44,510 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)] === [2024-06-21 16:01:44,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1114530306, now seen corresponding path program 22 times [2024-06-21 16:01:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:44,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639788822] [2024-06-21 16:01:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:44,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:44,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639788822] [2024-06-21 16:01:44,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639788822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:44,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:44,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:44,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990412098] [2024-06-21 16:01:44,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:44,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:44,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:44,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:44,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 557 transitions, 6535 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:44,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:44,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:44,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:46,035 INFO L124 PetriNetUnfolderBase]: 3551/6087 cut-off events. [2024-06-21 16:01:46,036 INFO L125 PetriNetUnfolderBase]: For 1607059/1607059 co-relation queries the response was YES. [2024-06-21 16:01:46,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49098 conditions, 6087 events. 3551/6087 cut-off events. For 1607059/1607059 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42443 event pairs, 839 based on Foata normal form. 1/6082 useless extension candidates. Maximal degree in co-relation 48878. Up to 5154 conditions per place. [2024-06-21 16:01:46,127 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 432 selfloop transitions, 137 changer transitions 0/577 dead transitions. [2024-06-21 16:01:46,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 577 transitions, 7723 flow [2024-06-21 16:01:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:01:46,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 16:01:46,349 INFO L175 Difference]: Start difference. First operand has 464 places, 557 transitions, 6535 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:01:46,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 577 transitions, 7723 flow [2024-06-21 16:01:55,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 577 transitions, 7294 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:01:55,349 INFO L231 Difference]: Finished difference. Result has 464 places, 557 transitions, 6388 flow [2024-06-21 16:01:55,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6388, PETRI_PLACES=464, PETRI_TRANSITIONS=557} [2024-06-21 16:01:55,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-21 16:01:55,350 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 557 transitions, 6388 flow [2024-06-21 16:01:55,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:55,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:55,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:55,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 16:01:55,350 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)] === [2024-06-21 16:01:55,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:55,350 INFO L85 PathProgramCache]: Analyzing trace with hash -198625733, now seen corresponding path program 9 times [2024-06-21 16:01:55,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:55,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848601380] [2024-06-21 16:01:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:55,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:55,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:55,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848601380] [2024-06-21 16:01:55,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848601380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:55,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:55,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:55,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490841142] [2024-06-21 16:01:55,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:55,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:55,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:55,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:55,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 557 transitions, 6388 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) [2024-06-21 16:01:55,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:55,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:55,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:57,135 INFO L124 PetriNetUnfolderBase]: 3605/6139 cut-off events. [2024-06-21 16:01:57,135 INFO L125 PetriNetUnfolderBase]: For 1757800/1757800 co-relation queries the response was YES. [2024-06-21 16:01:57,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51441 conditions, 6139 events. 3605/6139 cut-off events. For 1757800/1757800 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 42655 event pairs, 966 based on Foata normal form. 2/6125 useless extension candidates. Maximal degree in co-relation 51220. Up to 4880 conditions per place. [2024-06-21 16:01:57,228 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 271 changer transitions 0/591 dead transitions. [2024-06-21 16:01:57,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 591 transitions, 8142 flow [2024-06-21 16:01:57,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:01:57,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 16:01:57,229 INFO L175 Difference]: Start difference. First operand has 464 places, 557 transitions, 6388 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:01:57,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 591 transitions, 8142 flow [2024-06-21 16:02:07,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 591 transitions, 7730 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:02:07,734 INFO L231 Difference]: Finished difference. Result has 464 places, 561 transitions, 6695 flow [2024-06-21 16:02:07,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6695, PETRI_PLACES=464, PETRI_TRANSITIONS=561} [2024-06-21 16:02:07,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-21 16:02:07,734 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 561 transitions, 6695 flow [2024-06-21 16:02:07,734 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) [2024-06-21 16:02:07,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:07,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:07,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 16:02:07,735 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)] === [2024-06-21 16:02:07,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash -190054853, now seen corresponding path program 10 times [2024-06-21 16:02:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:07,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630856841] [2024-06-21 16:02:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:07,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:07,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:07,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630856841] [2024-06-21 16:02:07,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630856841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:07,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:07,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:07,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464913797] [2024-06-21 16:02:07,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:07,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:07,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:07,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:07,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:07,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:07,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 561 transitions, 6695 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) [2024-06-21 16:02:07,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:07,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:07,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:09,404 INFO L124 PetriNetUnfolderBase]: 3613/6156 cut-off events. [2024-06-21 16:02:09,404 INFO L125 PetriNetUnfolderBase]: For 1779429/1779429 co-relation queries the response was YES. [2024-06-21 16:02:09,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52073 conditions, 6156 events. 3613/6156 cut-off events. For 1779429/1779429 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 42806 event pairs, 973 based on Foata normal form. 2/6142 useless extension candidates. Maximal degree in co-relation 51851. Up to 4981 conditions per place. [2024-06-21 16:02:09,499 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 309 selfloop transitions, 268 changer transitions 0/585 dead transitions. [2024-06-21 16:02:09,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 585 transitions, 7991 flow [2024-06-21 16:02:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 16:02:09,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 16:02:09,500 INFO L175 Difference]: Start difference. First operand has 464 places, 561 transitions, 6695 flow. Second operand 8 states and 195 transitions. [2024-06-21 16:02:09,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 585 transitions, 7991 flow [2024-06-21 16:02:19,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 585 transitions, 7543 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 16:02:19,960 INFO L231 Difference]: Finished difference. Result has 468 places, 563 transitions, 6880 flow [2024-06-21 16:02:19,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6269, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6880, PETRI_PLACES=468, PETRI_TRANSITIONS=563} [2024-06-21 16:02:19,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-21 16:02:19,961 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 563 transitions, 6880 flow [2024-06-21 16:02:19,961 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) [2024-06-21 16:02:19,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:19,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:19,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 16:02:19,961 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)] === [2024-06-21 16:02:19,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1286985275, now seen corresponding path program 11 times [2024-06-21 16:02:19,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:19,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684028839] [2024-06-21 16:02:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:19,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:20,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:20,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684028839] [2024-06-21 16:02:20,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684028839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:20,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:20,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:20,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675629149] [2024-06-21 16:02:20,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:20,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:20,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:20,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:20,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:20,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:20,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 563 transitions, 6880 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) [2024-06-21 16:02:20,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:20,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:20,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:21,701 INFO L124 PetriNetUnfolderBase]: 3621/6168 cut-off events. [2024-06-21 16:02:21,702 INFO L125 PetriNetUnfolderBase]: For 1797392/1797392 co-relation queries the response was YES. [2024-06-21 16:02:21,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52587 conditions, 6168 events. 3621/6168 cut-off events. For 1797392/1797392 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 42894 event pairs, 973 based on Foata normal form. 2/6154 useless extension candidates. Maximal degree in co-relation 52363. Up to 4993 conditions per place. [2024-06-21 16:02:21,798 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 266 changer transitions 0/584 dead transitions. [2024-06-21 16:02:21,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 584 transitions, 8148 flow [2024-06-21 16:02:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 16:02:21,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:02:21,798 INFO L175 Difference]: Start difference. First operand has 468 places, 563 transitions, 6880 flow. Second operand 8 states and 192 transitions. [2024-06-21 16:02:21,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 584 transitions, 8148 flow [2024-06-21 16:02:32,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 584 transitions, 7557 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:02:32,512 INFO L231 Difference]: Finished difference. Result has 470 places, 565 transitions, 6900 flow [2024-06-21 16:02:32,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6900, PETRI_PLACES=470, PETRI_TRANSITIONS=565} [2024-06-21 16:02:32,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-21 16:02:32,513 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 565 transitions, 6900 flow [2024-06-21 16:02:32,513 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) [2024-06-21 16:02:32,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:32,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:32,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 16:02:32,514 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)] === [2024-06-21 16:02:32,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:32,514 INFO L85 PathProgramCache]: Analyzing trace with hash 592540807, now seen corresponding path program 12 times [2024-06-21 16:02:32,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:32,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170917552] [2024-06-21 16:02:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:32,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:32,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:32,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170917552] [2024-06-21 16:02:32,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170917552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:32,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:32,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:32,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284652142] [2024-06-21 16:02:32,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:32,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:32,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:32,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:32,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:32,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 565 transitions, 6900 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) [2024-06-21 16:02:32,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:32,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:32,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:34,201 INFO L124 PetriNetUnfolderBase]: 3657/6224 cut-off events. [2024-06-21 16:02:34,201 INFO L125 PetriNetUnfolderBase]: For 1937002/1937002 co-relation queries the response was YES. [2024-06-21 16:02:34,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53355 conditions, 6224 events. 3657/6224 cut-off events. For 1937002/1937002 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 43322 event pairs, 977 based on Foata normal form. 10/6218 useless extension candidates. Maximal degree in co-relation 53130. Up to 5017 conditions per place. [2024-06-21 16:02:34,300 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 317 selfloop transitions, 261 changer transitions 0/586 dead transitions. [2024-06-21 16:02:34,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 586 transitions, 8194 flow [2024-06-21 16:02:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 16:02:34,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 16:02:34,301 INFO L175 Difference]: Start difference. First operand has 470 places, 565 transitions, 6900 flow. Second operand 8 states and 193 transitions. [2024-06-21 16:02:34,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 586 transitions, 8194 flow [2024-06-21 16:02:45,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 586 transitions, 7603 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 16:02:45,079 INFO L231 Difference]: Finished difference. Result has 472 places, 567 transitions, 6915 flow [2024-06-21 16:02:45,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6915, PETRI_PLACES=472, PETRI_TRANSITIONS=567} [2024-06-21 16:02:45,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-21 16:02:45,079 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 567 transitions, 6915 flow [2024-06-21 16:02:45,080 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) [2024-06-21 16:02:45,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:45,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:45,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 16:02:45,080 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)] === [2024-06-21 16:02:45,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:45,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1134076593, now seen corresponding path program 13 times [2024-06-21 16:02:45,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:45,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661123941] [2024-06-21 16:02:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:45,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:45,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:45,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661123941] [2024-06-21 16:02:45,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661123941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:45,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:45,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:45,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832834182] [2024-06-21 16:02:45,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:45,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:45,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:45,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:45,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:45,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:45,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 567 transitions, 6915 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) [2024-06-21 16:02:45,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:45,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:45,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:47,261 INFO L124 PetriNetUnfolderBase]: 3634/6219 cut-off events. [2024-06-21 16:02:47,262 INFO L125 PetriNetUnfolderBase]: For 1816342/1816342 co-relation queries the response was YES. [2024-06-21 16:02:47,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51387 conditions, 6219 events. 3634/6219 cut-off events. For 1816342/1816342 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 43466 event pairs, 847 based on Foata normal form. 10/6223 useless extension candidates. Maximal degree in co-relation 51161. Up to 5227 conditions per place. [2024-06-21 16:02:47,410 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 451 selfloop transitions, 139 changer transitions 0/598 dead transitions. [2024-06-21 16:02:47,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 598 transitions, 8191 flow [2024-06-21 16:02:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 16:02:47,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 16:02:47,411 INFO L175 Difference]: Start difference. First operand has 472 places, 567 transitions, 6915 flow. Second operand 8 states and 208 transitions. [2024-06-21 16:02:47,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 598 transitions, 8191 flow [2024-06-21 16:02:57,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 598 transitions, 7563 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 16:02:57,255 INFO L231 Difference]: Finished difference. Result has 474 places, 567 transitions, 6574 flow [2024-06-21 16:02:57,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6574, PETRI_PLACES=474, PETRI_TRANSITIONS=567} [2024-06-21 16:02:57,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-21 16:02:57,256 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 567 transitions, 6574 flow [2024-06-21 16:02:57,256 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) [2024-06-21 16:02:57,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:57,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:57,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 16:02:57,257 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)] === [2024-06-21 16:02:57,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:57,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1436394831, now seen corresponding path program 14 times [2024-06-21 16:02:57,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:57,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488746448] [2024-06-21 16:02:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:57,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:57,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:57,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488746448] [2024-06-21 16:02:57,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488746448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:57,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:57,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:57,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463654391] [2024-06-21 16:02:57,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:57,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:57,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:57,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:57,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 567 transitions, 6574 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) [2024-06-21 16:02:57,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:57,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:57,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:58,951 INFO L124 PetriNetUnfolderBase]: 3611/6195 cut-off events. [2024-06-21 16:02:58,951 INFO L125 PetriNetUnfolderBase]: For 1677620/1677620 co-relation queries the response was YES. [2024-06-21 16:02:59,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48237 conditions, 6195 events. 3611/6195 cut-off events. For 1677620/1677620 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 43306 event pairs, 818 based on Foata normal form. 10/6202 useless extension candidates. Maximal degree in co-relation 48010. Up to 5188 conditions per place. [2024-06-21 16:02:59,046 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 444 selfloop transitions, 153 changer transitions 0/605 dead transitions. [2024-06-21 16:02:59,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 605 transitions, 7882 flow [2024-06-21 16:02:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:02:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:02:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-21 16:02:59,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6395663956639567 [2024-06-21 16:02:59,046 INFO L175 Difference]: Start difference. First operand has 474 places, 567 transitions, 6574 flow. Second operand 9 states and 236 transitions. [2024-06-21 16:02:59,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 605 transitions, 7882 flow [2024-06-21 16:03:07,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 605 transitions, 7532 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 16:03:07,783 INFO L231 Difference]: Finished difference. Result has 476 places, 567 transitions, 6542 flow [2024-06-21 16:03:07,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6542, PETRI_PLACES=476, PETRI_TRANSITIONS=567} [2024-06-21 16:03:07,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-21 16:03:07,783 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 567 transitions, 6542 flow [2024-06-21 16:03:07,783 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) [2024-06-21 16:03:07,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:07,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:07,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 16:03:07,784 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)] === [2024-06-21 16:03:07,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1110801814, now seen corresponding path program 1 times [2024-06-21 16:03:07,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:07,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559597859] [2024-06-21 16:03:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:07,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:07,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:07,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559597859] [2024-06-21 16:03:07,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559597859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:07,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:07,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:07,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714406864] [2024-06-21 16:03:07,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:07,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:07,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:07,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:07,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:07,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 567 transitions, 6542 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:07,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:07,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:07,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:09,644 INFO L124 PetriNetUnfolderBase]: 3631/6233 cut-off events. [2024-06-21 16:03:09,644 INFO L125 PetriNetUnfolderBase]: For 1632400/1632400 co-relation queries the response was YES. [2024-06-21 16:03:09,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48112 conditions, 6233 events. 3631/6233 cut-off events. For 1632400/1632400 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 43715 event pairs, 872 based on Foata normal form. 6/6231 useless extension candidates. Maximal degree in co-relation 47884. Up to 5279 conditions per place. [2024-06-21 16:03:09,738 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 476 selfloop transitions, 108 changer transitions 0/592 dead transitions. [2024-06-21 16:03:09,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 592 transitions, 7810 flow [2024-06-21 16:03:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:03:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:03:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-21 16:03:09,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-21 16:03:09,739 INFO L175 Difference]: Start difference. First operand has 476 places, 567 transitions, 6542 flow. Second operand 10 states and 232 transitions. [2024-06-21 16:03:09,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 592 transitions, 7810 flow [2024-06-21 16:03:20,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 592 transitions, 7488 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:03:20,709 INFO L231 Difference]: Finished difference. Result has 478 places, 568 transitions, 6470 flow [2024-06-21 16:03:20,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6220, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6470, PETRI_PLACES=478, PETRI_TRANSITIONS=568} [2024-06-21 16:03:20,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-21 16:03:20,710 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 568 transitions, 6470 flow [2024-06-21 16:03:20,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:20,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:20,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:20,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 16:03:20,711 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)] === [2024-06-21 16:03:20,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:20,711 INFO L85 PathProgramCache]: Analyzing trace with hash 667980454, now seen corresponding path program 2 times [2024-06-21 16:03:20,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:20,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654051981] [2024-06-21 16:03:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:20,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:20,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:20,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654051981] [2024-06-21 16:03:20,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654051981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:20,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:20,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:20,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496642129] [2024-06-21 16:03:20,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:20,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:20,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:20,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:20,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:20,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 568 transitions, 6470 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:20,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:20,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:20,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:22,495 INFO L124 PetriNetUnfolderBase]: 3651/6267 cut-off events. [2024-06-21 16:03:22,495 INFO L125 PetriNetUnfolderBase]: For 1633504/1633504 co-relation queries the response was YES. [2024-06-21 16:03:22,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48238 conditions, 6267 events. 3651/6267 cut-off events. For 1633504/1633504 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43927 event pairs, 843 based on Foata normal form. 6/6265 useless extension candidates. Maximal degree in co-relation 48009. Up to 4884 conditions per place. [2024-06-21 16:03:22,594 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 476 selfloop transitions, 112 changer transitions 0/596 dead transitions. [2024-06-21 16:03:22,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 596 transitions, 8098 flow [2024-06-21 16:03:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:03:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:03:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 16:03:22,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-21 16:03:22,595 INFO L175 Difference]: Start difference. First operand has 478 places, 568 transitions, 6470 flow. Second operand 9 states and 215 transitions. [2024-06-21 16:03:22,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 596 transitions, 8098 flow [2024-06-21 16:03:32,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 596 transitions, 7858 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 16:03:32,509 INFO L231 Difference]: Finished difference. Result has 479 places, 569 transitions, 6488 flow [2024-06-21 16:03:32,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6230, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6488, PETRI_PLACES=479, PETRI_TRANSITIONS=569} [2024-06-21 16:03:32,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-21 16:03:32,510 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 569 transitions, 6488 flow [2024-06-21 16:03:32,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:32,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:32,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:32,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 16:03:32,510 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)] === [2024-06-21 16:03:32,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:32,510 INFO L85 PathProgramCache]: Analyzing trace with hash -509994738, now seen corresponding path program 3 times [2024-06-21 16:03:32,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:32,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694106841] [2024-06-21 16:03:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:32,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:32,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:32,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694106841] [2024-06-21 16:03:32,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694106841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:32,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:32,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:32,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330132391] [2024-06-21 16:03:32,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:32,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:32,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:32,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:32,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 569 transitions, 6488 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:32,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:32,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:32,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:34,349 INFO L124 PetriNetUnfolderBase]: 3638/6248 cut-off events. [2024-06-21 16:03:34,350 INFO L125 PetriNetUnfolderBase]: For 1564424/1564424 co-relation queries the response was YES. [2024-06-21 16:03:34,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47167 conditions, 6248 events. 3638/6248 cut-off events. For 1564424/1564424 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43765 event pairs, 837 based on Foata normal form. 6/6246 useless extension candidates. Maximal degree in co-relation 46937. Up to 4878 conditions per place. [2024-06-21 16:03:34,446 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 472 selfloop transitions, 116 changer transitions 0/596 dead transitions. [2024-06-21 16:03:34,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 596 transitions, 7756 flow [2024-06-21 16:03:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:03:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:03:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 16:03:34,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:03:34,447 INFO L175 Difference]: Start difference. First operand has 479 places, 569 transitions, 6488 flow. Second operand 9 states and 216 transitions. [2024-06-21 16:03:34,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 596 transitions, 7756 flow [2024-06-21 16:03:44,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 596 transitions, 7489 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:44,505 INFO L231 Difference]: Finished difference. Result has 482 places, 569 transitions, 6457 flow [2024-06-21 16:03:44,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6457, PETRI_PLACES=482, PETRI_TRANSITIONS=569} [2024-06-21 16:03:44,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-21 16:03:44,506 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 569 transitions, 6457 flow [2024-06-21 16:03:44,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:44,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:44,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:44,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 16:03:44,506 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)] === [2024-06-21 16:03:44,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:44,506 INFO L85 PathProgramCache]: Analyzing trace with hash -278880008, now seen corresponding path program 4 times [2024-06-21 16:03:44,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:44,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766823889] [2024-06-21 16:03:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:44,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:44,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:44,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766823889] [2024-06-21 16:03:44,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766823889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:44,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:44,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:03:44,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362173894] [2024-06-21 16:03:44,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:44,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:03:44,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:44,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:03:44,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:03:44,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:44,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 569 transitions, 6457 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:44,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:44,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:44,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:46,279 INFO L124 PetriNetUnfolderBase]: 3625/6223 cut-off events. [2024-06-21 16:03:46,279 INFO L125 PetriNetUnfolderBase]: For 1491666/1491666 co-relation queries the response was YES. [2024-06-21 16:03:46,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45862 conditions, 6223 events. 3625/6223 cut-off events. For 1491666/1491666 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43661 event pairs, 607 based on Foata normal form. 6/6224 useless extension candidates. Maximal degree in co-relation 45631. Up to 4763 conditions per place. [2024-06-21 16:03:46,388 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 107 changer transitions 1/611 dead transitions. [2024-06-21 16:03:46,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 611 transitions, 7832 flow [2024-06-21 16:03:46,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 16:03:46,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6615853658536586 [2024-06-21 16:03:46,389 INFO L175 Difference]: Start difference. First operand has 482 places, 569 transitions, 6457 flow. Second operand 8 states and 217 transitions. [2024-06-21 16:03:46,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 611 transitions, 7832 flow [2024-06-21 16:03:56,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 611 transitions, 7563 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 16:03:56,175 INFO L231 Difference]: Finished difference. Result has 482 places, 570 transitions, 6445 flow [2024-06-21 16:03:56,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6445, PETRI_PLACES=482, PETRI_TRANSITIONS=570} [2024-06-21 16:03:56,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-21 16:03:56,176 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 570 transitions, 6445 flow [2024-06-21 16:03:56,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:56,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:56,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:56,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 16:03:56,176 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)] === [2024-06-21 16:03:56,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash -262958408, now seen corresponding path program 5 times [2024-06-21 16:03:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:56,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923488806] [2024-06-21 16:03:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:56,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:56,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:56,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923488806] [2024-06-21 16:03:56,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923488806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:56,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:56,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:03:56,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203838616] [2024-06-21 16:03:56,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:56,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:03:56,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:03:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:03:56,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:56,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 570 transitions, 6445 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:56,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:56,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:56,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:58,039 INFO L124 PetriNetUnfolderBase]: 3645/6273 cut-off events. [2024-06-21 16:03:58,039 INFO L125 PetriNetUnfolderBase]: For 1507036/1507036 co-relation queries the response was YES. [2024-06-21 16:03:58,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46056 conditions, 6273 events. 3645/6273 cut-off events. For 1507036/1507036 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 44139 event pairs, 547 based on Foata normal form. 6/6273 useless extension candidates. Maximal degree in co-relation 45824. Up to 3958 conditions per place. [2024-06-21 16:03:58,137 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 492 selfloop transitions, 108 changer transitions 0/608 dead transitions. [2024-06-21 16:03:58,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 608 transitions, 8525 flow [2024-06-21 16:03:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:03:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:03:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 16:03:58,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662020905923345 [2024-06-21 16:03:58,138 INFO L175 Difference]: Start difference. First operand has 482 places, 570 transitions, 6445 flow. Second operand 7 states and 190 transitions. [2024-06-21 16:03:58,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 608 transitions, 8525 flow [2024-06-21 16:04:08,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 608 transitions, 8343 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:04:08,840 INFO L231 Difference]: Finished difference. Result has 483 places, 572 transitions, 6551 flow [2024-06-21 16:04:08,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6551, PETRI_PLACES=483, PETRI_TRANSITIONS=572} [2024-06-21 16:04:08,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-21 16:04:08,840 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 572 transitions, 6551 flow [2024-06-21 16:04:08,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:08,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:08,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 16:04:08,841 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)] === [2024-06-21 16:04:08,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash -511799098, now seen corresponding path program 6 times [2024-06-21 16:04:08,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:08,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971508835] [2024-06-21 16:04:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:08,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:08,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:08,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971508835] [2024-06-21 16:04:08,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971508835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:08,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:08,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:04:08,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887899277] [2024-06-21 16:04:08,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:08,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:04:08,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:08,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:04:08,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:04:08,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:08,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 572 transitions, 6551 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:08,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:08,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:08,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:10,593 INFO L124 PetriNetUnfolderBase]: 3632/6251 cut-off events. [2024-06-21 16:04:10,593 INFO L125 PetriNetUnfolderBase]: For 1420248/1420248 co-relation queries the response was YES. [2024-06-21 16:04:10,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45088 conditions, 6251 events. 3632/6251 cut-off events. For 1420248/1420248 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 43957 event pairs, 580 based on Foata normal form. 6/6251 useless extension candidates. Maximal degree in co-relation 44856. Up to 3952 conditions per place. [2024-06-21 16:04:10,692 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 490 selfloop transitions, 108 changer transitions 0/606 dead transitions. [2024-06-21 16:04:10,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 606 transitions, 8213 flow [2024-06-21 16:04:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:04:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:04:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 16:04:10,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 16:04:10,693 INFO L175 Difference]: Start difference. First operand has 483 places, 572 transitions, 6551 flow. Second operand 7 states and 189 transitions. [2024-06-21 16:04:10,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 606 transitions, 8213 flow [2024-06-21 16:04:22,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 606 transitions, 8021 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 16:04:22,151 INFO L231 Difference]: Finished difference. Result has 487 places, 572 transitions, 6581 flow [2024-06-21 16:04:22,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6359, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6581, PETRI_PLACES=487, PETRI_TRANSITIONS=572} [2024-06-21 16:04:22,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-21 16:04:22,152 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 572 transitions, 6581 flow [2024-06-21 16:04:22,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:22,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:22,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:22,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 16:04:22,152 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)] === [2024-06-21 16:04:22,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash -785980906, now seen corresponding path program 1 times [2024-06-21 16:04:22,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:22,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652661356] [2024-06-21 16:04:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:22,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:22,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:22,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652661356] [2024-06-21 16:04:22,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652661356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:22,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:22,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:22,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627882239] [2024-06-21 16:04:22,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:22,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:22,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:22,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:22,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 572 transitions, 6581 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:22,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:22,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:22,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:24,068 INFO L124 PetriNetUnfolderBase]: 3685/6337 cut-off events. [2024-06-21 16:04:24,068 INFO L125 PetriNetUnfolderBase]: For 1528936/1528936 co-relation queries the response was YES. [2024-06-21 16:04:24,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46598 conditions, 6337 events. 3685/6337 cut-off events. For 1528936/1528936 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 44565 event pairs, 643 based on Foata normal form. 6/6338 useless extension candidates. Maximal degree in co-relation 46365. Up to 4943 conditions per place. [2024-06-21 16:04:24,167 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 557 selfloop transitions, 55 changer transitions 4/624 dead transitions. [2024-06-21 16:04:24,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 624 transitions, 8713 flow [2024-06-21 16:04:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:04:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:04:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-21 16:04:24,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314363143631436 [2024-06-21 16:04:24,169 INFO L175 Difference]: Start difference. First operand has 487 places, 572 transitions, 6581 flow. Second operand 9 states and 233 transitions. [2024-06-21 16:04:24,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 624 transitions, 8713 flow Killed by 15