./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe028_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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:56:37,329 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:56:37,376 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:56:37,379 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:56:37,380 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:56:37,408 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:56:37,409 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:56:37,409 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:56:37,410 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:56:37,410 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:56:37,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:56:37,411 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:56:37,411 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:56:37,411 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:56:37,412 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:56:37,412 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:56:37,412 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:56:37,413 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:56:37,413 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:56:37,413 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:56:37,414 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:56:37,414 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:56:37,414 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:56:37,420 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:56:37,420 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:56:37,420 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:56:37,420 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:56:37,420 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:56:37,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:56:37,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:56:37,421 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:56:37,421 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:56:37,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:56:37,421 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:56:37,421 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:56:37,422 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:56:37,422 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:56:37,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:56:37,422 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:56:37,422 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:56:37,422 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:56:37,423 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:56:37,423 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:56:37,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:56:37,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:56:37,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:56:37,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:56:37,660 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:56:37,661 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:56:37,661 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 17:56:37,784 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:56:37,784 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:56:37,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:56:38,716 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:56:38,918 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:56:38,919 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:56:38,931 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d436ebb32/c0028be23e3d4955aec01748a6f3592c/FLAGcfddf2347 [2024-06-27 17:56:38,941 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d436ebb32/c0028be23e3d4955aec01748a6f3592c [2024-06-27 17:56:38,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:56:38,943 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:56:38,943 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:56:38,944 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:56:38,947 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:56:38,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:56:37" (1/2) ... [2024-06-27 17:56:38,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@462d0966 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:56:38, skipping insertion in model container [2024-06-27 17:56:38,948 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:56:37" (1/2) ... [2024-06-27 17:56:38,949 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@cfe3b9f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:56:38, skipping insertion in model container [2024-06-27 17:56:38,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:56:38" (2/2) ... [2024-06-27 17:56:38,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@462d0966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:38, skipping insertion in model container [2024-06-27 17:56:38,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:56:38" (2/2) ... [2024-06-27 17:56:38,950 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:56:38,982 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:56:38,983 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 17:56:38,983 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 17:56:38,983 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 17:56:38,983 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:56:38,984 INFO L106 edCorrectnessWitness]: ghost_update [L778-L778] multithreaded = 1; [2024-06-27 17:56:39,016 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:56:39,160 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-27 17:56:39,254 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:56:39,261 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:56:39,286 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:56:39,333 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:56:39,361 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:56:39,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39 WrapperNode [2024-06-27 17:56:39,361 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:56:39,362 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:56:39,363 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:56:39,363 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:56:39,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,387 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,407 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-27 17:56:39,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:56:39,410 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:56:39,410 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:56:39,410 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:56:39,417 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,423 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,441 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]. [2024-06-27 17:56:39,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,442 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,456 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,459 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,462 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,465 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:56:39,469 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:56:39,469 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:56:39,470 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:56:39,470 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (1/1) ... [2024-06-27 17:56:39,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:56:39,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:56:39,517 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) [2024-06-27 17:56:39,519 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 [2024-06-27 17:56:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:56:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:56:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:56:39,541 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:56:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:56:39,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:56:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:56:39,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:56:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:56:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:56:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:56:39,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:56:39,543 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:56:39,633 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:56:39,634 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:56:39,789 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:56:39,789 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:56:39,915 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:56:39,915 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:56:39,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:56:39 BoogieIcfgContainer [2024-06-27 17:56:39,916 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:56:39,917 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:56:39,917 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:56:39,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:56:39,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:56:37" (1/4) ... [2024-06-27 17:56:39,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f94934 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:56:39, skipping insertion in model container [2024-06-27 17:56:39,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:56:38" (2/4) ... [2024-06-27 17:56:39,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f94934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:56:39, skipping insertion in model container [2024-06-27 17:56:39,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:39" (3/4) ... [2024-06-27 17:56:39,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f94934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:56:39, skipping insertion in model container [2024-06-27 17:56:39,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:56:39" (4/4) ... [2024-06-27 17:56:39,922 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:56:39,935 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:56:39,935 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:56:39,935 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:56:39,963 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:56:39,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 17:56:40,021 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-27 17:56:40,022 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:56:40,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-27 17:56:40,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 17:56:40,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-27 17:56:40,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:56:40,042 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;@19af61e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:56:40,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:56:40,045 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:56:40,045 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:56:40,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:56:40,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:40,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:56:40,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:40,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash 206126996, now seen corresponding path program 1 times [2024-06-27 17:56:40,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:40,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366247953] [2024-06-27 17:56:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:40,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:40,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:40,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366247953] [2024-06-27 17:56:40,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366247953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:40,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:40,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:56:40,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751217184] [2024-06-27 17:56:40,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:40,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:56:40,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:56:40,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:56:40,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 17:56:40,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:40,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:40,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 17:56:40,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:40,618 INFO L124 PetriNetUnfolderBase]: 575/1029 cut-off events. [2024-06-27 17:56:40,619 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 17:56:40,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1969 conditions, 1029 events. 575/1029 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5614 event pairs, 391 based on Foata normal form. 1/983 useless extension candidates. Maximal degree in co-relation 1957. Up to 883 conditions per place. [2024-06-27 17:56:40,630 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 30 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-27 17:56:40,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 185 flow [2024-06-27 17:56:40,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:56:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:56:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-27 17:56:40,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2024-06-27 17:56:40,641 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 100 transitions. [2024-06-27 17:56:40,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 185 flow [2024-06-27 17:56:40,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:40,647 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-27 17:56:40,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 17:56:40,651 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-27 17:56:40,652 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-27 17:56:40,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:40,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:40,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:40,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:56:40,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:40,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:40,654 INFO L85 PathProgramCache]: Analyzing trace with hash 519593139, now seen corresponding path program 1 times [2024-06-27 17:56:40,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:40,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593666181] [2024-06-27 17:56:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:40,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:40,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593666181] [2024-06-27 17:56:40,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593666181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:40,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:40,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:56:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95627971] [2024-06-27 17:56:40,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:40,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:56:40,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:40,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:56:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:56:40,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 17:56:40,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) [2024-06-27 17:56:40,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:40,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 17:56:40,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:40,998 INFO L124 PetriNetUnfolderBase]: 750/1405 cut-off events. [2024-06-27 17:56:40,998 INFO L125 PetriNetUnfolderBase]: For 271/301 co-relation queries the response was YES. [2024-06-27 17:56:41,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 1405 events. 750/1405 cut-off events. For 271/301 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8172 event pairs, 443 based on Foata normal form. 3/1375 useless extension candidates. Maximal degree in co-relation 2956. Up to 1115 conditions per place. [2024-06-27 17:56:41,007 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 43 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-06-27 17:56:41,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 278 flow [2024-06-27 17:56:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:56:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:56:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-27 17:56:41,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-06-27 17:56:41,013 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 130 transitions. [2024-06-27 17:56:41,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 278 flow [2024-06-27 17:56:41,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:56:41,017 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 166 flow [2024-06-27 17:56:41,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-27 17:56:41,018 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-06-27 17:56:41,018 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 166 flow [2024-06-27 17:56:41,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) [2024-06-27 17:56:41,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:41,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:41,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:56:41,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:41,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:41,028 INFO L85 PathProgramCache]: Analyzing trace with hash -990439750, now seen corresponding path program 1 times [2024-06-27 17:56:41,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:41,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508054565] [2024-06-27 17:56:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:41,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:41,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:41,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508054565] [2024-06-27 17:56:41,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508054565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:41,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:41,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:56:41,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752688957] [2024-06-27 17:56:41,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:41,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:56:41,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:41,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:56:41,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:56:41,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:41,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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) [2024-06-27 17:56:41,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:41,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:41,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:41,339 INFO L124 PetriNetUnfolderBase]: 995/1665 cut-off events. [2024-06-27 17:56:41,339 INFO L125 PetriNetUnfolderBase]: For 801/826 co-relation queries the response was YES. [2024-06-27 17:56:41,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4125 conditions, 1665 events. 995/1665 cut-off events. For 801/826 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9424 event pairs, 464 based on Foata normal form. 2/1639 useless extension candidates. Maximal degree in co-relation 4110. Up to 1475 conditions per place. [2024-06-27 17:56:41,347 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 45 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2024-06-27 17:56:41,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 331 flow [2024-06-27 17:56:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:56:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:56:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-27 17:56:41,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-27 17:56:41,351 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 166 flow. Second operand 4 states and 123 transitions. [2024-06-27 17:56:41,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 331 flow [2024-06-27 17:56:41,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 69 transitions, 329 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:56:41,354 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 225 flow [2024-06-27 17:56:41,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-27 17:56:41,356 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2024-06-27 17:56:41,356 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 225 flow [2024-06-27 17:56:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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) [2024-06-27 17:56:41,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:41,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:41,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:56:41,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:41,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:41,358 INFO L85 PathProgramCache]: Analyzing trace with hash -46351, now seen corresponding path program 1 times [2024-06-27 17:56:41,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:41,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848696898] [2024-06-27 17:56:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:41,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:41,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:41,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848696898] [2024-06-27 17:56:41,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848696898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:41,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:41,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:41,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530973096] [2024-06-27 17:56:41,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:41,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:41,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:41,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:41,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:41,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:41,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 225 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:41,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:41,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:41,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:41,707 INFO L124 PetriNetUnfolderBase]: 1101/1809 cut-off events. [2024-06-27 17:56:41,708 INFO L125 PetriNetUnfolderBase]: For 1477/1489 co-relation queries the response was YES. [2024-06-27 17:56:41,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4888 conditions, 1809 events. 1101/1809 cut-off events. For 1477/1489 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9983 event pairs, 251 based on Foata normal form. 18/1813 useless extension candidates. Maximal degree in co-relation 4869. Up to 1557 conditions per place. [2024-06-27 17:56:41,717 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 61 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-06-27 17:56:41,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 92 transitions, 473 flow [2024-06-27 17:56:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 17:56:41,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 17:56:41,719 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 225 flow. Second operand 6 states and 185 transitions. [2024-06-27 17:56:41,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 92 transitions, 473 flow [2024-06-27 17:56:41,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 471 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:56:41,722 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 285 flow [2024-06-27 17:56:41,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-27 17:56:41,723 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2024-06-27 17:56:41,723 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 285 flow [2024-06-27 17:56:41,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:41,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:41,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:41,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:56:41,724 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:41,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:41,724 INFO L85 PathProgramCache]: Analyzing trace with hash 971375189, now seen corresponding path program 1 times [2024-06-27 17:56:41,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:41,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920327066] [2024-06-27 17:56:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:41,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:41,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:41,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920327066] [2024-06-27 17:56:41,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920327066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:41,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:41,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:41,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205814063] [2024-06-27 17:56:41,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:41,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:41,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:41,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:41,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:41,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:41,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:41,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:41,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:41,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:41,999 INFO L124 PetriNetUnfolderBase]: 1184/1922 cut-off events. [2024-06-27 17:56:42,000 INFO L125 PetriNetUnfolderBase]: For 2394/2394 co-relation queries the response was YES. [2024-06-27 17:56:42,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5749 conditions, 1922 events. 1184/1922 cut-off events. For 2394/2394 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10537 event pairs, 371 based on Foata normal form. 2/1917 useless extension candidates. Maximal degree in co-relation 5726. Up to 1699 conditions per place. [2024-06-27 17:56:42,008 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 64 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-06-27 17:56:42,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 556 flow [2024-06-27 17:56:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:56:42,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-27 17:56:42,009 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 285 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:56:42,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 556 flow [2024-06-27 17:56:42,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 525 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:42,013 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 344 flow [2024-06-27 17:56:42,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-27 17:56:42,014 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2024-06-27 17:56:42,014 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 344 flow [2024-06-27 17:56:42,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:42,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:42,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:42,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:56:42,015 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:42,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:42,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2051922885, now seen corresponding path program 2 times [2024-06-27 17:56:42,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:42,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945851637] [2024-06-27 17:56:42,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:42,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945851637] [2024-06-27 17:56:42,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945851637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:42,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:42,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:42,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427623538] [2024-06-27 17:56:42,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:42,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:42,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:42,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:42,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:42,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:42,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:42,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:42,262 INFO L124 PetriNetUnfolderBase]: 1179/1913 cut-off events. [2024-06-27 17:56:42,262 INFO L125 PetriNetUnfolderBase]: For 3256/3256 co-relation queries the response was YES. [2024-06-27 17:56:42,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6132 conditions, 1913 events. 1179/1913 cut-off events. For 3256/3256 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10460 event pairs, 374 based on Foata normal form. 2/1907 useless extension candidates. Maximal degree in co-relation 6107. Up to 1694 conditions per place. [2024-06-27 17:56:42,274 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 59 selfloop transitions, 15 changer transitions 0/88 dead transitions. [2024-06-27 17:56:42,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 549 flow [2024-06-27 17:56:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 17:56:42,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2024-06-27 17:56:42,276 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 344 flow. Second operand 5 states and 148 transitions. [2024-06-27 17:56:42,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 549 flow [2024-06-27 17:56:42,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 523 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:42,283 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 363 flow [2024-06-27 17:56:42,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-06-27 17:56:42,285 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 21 predicate places. [2024-06-27 17:56:42,285 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 363 flow [2024-06-27 17:56:42,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:42,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:42,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:42,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:56:42,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:42,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:42,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1670172409, now seen corresponding path program 1 times [2024-06-27 17:56:42,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:42,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556161319] [2024-06-27 17:56:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:42,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:42,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:42,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556161319] [2024-06-27 17:56:42,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556161319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:42,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:42,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:42,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442343286] [2024-06-27 17:56:42,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:42,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:42,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:42,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:42,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:42,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:42,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-06-27 17:56:42,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:42,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:42,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:42,574 INFO L124 PetriNetUnfolderBase]: 1019/1750 cut-off events. [2024-06-27 17:56:42,574 INFO L125 PetriNetUnfolderBase]: For 3684/3684 co-relation queries the response was YES. [2024-06-27 17:56:42,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5639 conditions, 1750 events. 1019/1750 cut-off events. For 3684/3684 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9975 event pairs, 297 based on Foata normal form. 4/1749 useless extension candidates. Maximal degree in co-relation 5613. Up to 1454 conditions per place. [2024-06-27 17:56:42,585 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 63 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-06-27 17:56:42,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 569 flow [2024-06-27 17:56:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 17:56:42,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:56:42,587 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 363 flow. Second operand 5 states and 150 transitions. [2024-06-27 17:56:42,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 569 flow [2024-06-27 17:56:42,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 547 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:42,591 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 380 flow [2024-06-27 17:56:42,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-27 17:56:42,593 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 24 predicate places. [2024-06-27 17:56:42,593 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 380 flow [2024-06-27 17:56:42,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-06-27 17:56:42,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:42,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:42,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:56:42,593 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:42,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:42,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1483501270, now seen corresponding path program 1 times [2024-06-27 17:56:42,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:42,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397266949] [2024-06-27 17:56:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:42,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:42,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:42,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397266949] [2024-06-27 17:56:42,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397266949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:42,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:42,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:42,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238013233] [2024-06-27 17:56:42,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:42,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:42,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:42,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:42,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:42,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:42,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:42,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:42,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:42,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:42,929 INFO L124 PetriNetUnfolderBase]: 1199/1960 cut-off events. [2024-06-27 17:56:42,929 INFO L125 PetriNetUnfolderBase]: For 4680/4680 co-relation queries the response was YES. [2024-06-27 17:56:42,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6518 conditions, 1960 events. 1199/1960 cut-off events. For 4680/4680 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10938 event pairs, 298 based on Foata normal form. 3/1960 useless extension candidates. Maximal degree in co-relation 6490. Up to 1692 conditions per place. [2024-06-27 17:56:42,940 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 75 selfloop transitions, 18 changer transitions 0/107 dead transitions. [2024-06-27 17:56:42,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 107 transitions, 674 flow [2024-06-27 17:56:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:56:42,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 17:56:42,941 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 380 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:56:42,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 107 transitions, 674 flow [2024-06-27 17:56:42,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 107 transitions, 653 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:42,948 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 434 flow [2024-06-27 17:56:42,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2024-06-27 17:56:42,950 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2024-06-27 17:56:42,951 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 434 flow [2024-06-27 17:56:42,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:42,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:42,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:42,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:56:42,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:42,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash 893039992, now seen corresponding path program 2 times [2024-06-27 17:56:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:42,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819826837] [2024-06-27 17:56:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:42,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:43,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:43,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819826837] [2024-06-27 17:56:43,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819826837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:43,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:43,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:43,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146582268] [2024-06-27 17:56:43,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:43,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:43,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:43,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:43,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 434 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:43,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:43,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:43,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:43,257 INFO L124 PetriNetUnfolderBase]: 1216/1994 cut-off events. [2024-06-27 17:56:43,257 INFO L125 PetriNetUnfolderBase]: For 5697/5697 co-relation queries the response was YES. [2024-06-27 17:56:43,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7150 conditions, 1994 events. 1216/1994 cut-off events. For 5697/5697 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11041 event pairs, 336 based on Foata normal form. 2/1989 useless extension candidates. Maximal degree in co-relation 7121. Up to 1685 conditions per place. [2024-06-27 17:56:43,267 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 77 selfloop transitions, 24 changer transitions 0/115 dead transitions. [2024-06-27 17:56:43,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 821 flow [2024-06-27 17:56:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 17:56:43,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-27 17:56:43,269 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 434 flow. Second operand 6 states and 182 transitions. [2024-06-27 17:56:43,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 821 flow [2024-06-27 17:56:43,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 115 transitions, 765 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:43,274 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 544 flow [2024-06-27 17:56:43,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=544, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-27 17:56:43,275 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2024-06-27 17:56:43,275 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 544 flow [2024-06-27 17:56:43,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:43,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:43,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:43,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:56:43,275 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:43,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash 893046936, now seen corresponding path program 1 times [2024-06-27 17:56:43,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:43,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528890691] [2024-06-27 17:56:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:43,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:43,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:43,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528890691] [2024-06-27 17:56:43,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528890691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:43,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:43,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:43,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928569469] [2024-06-27 17:56:43,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:43,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:43,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:43,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:43,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 544 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:43,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:43,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:43,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:43,602 INFO L124 PetriNetUnfolderBase]: 1243/2033 cut-off events. [2024-06-27 17:56:43,602 INFO L125 PetriNetUnfolderBase]: For 7529/7529 co-relation queries the response was YES. [2024-06-27 17:56:43,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7795 conditions, 2033 events. 1243/2033 cut-off events. For 7529/7529 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11245 event pairs, 330 based on Foata normal form. 4/2030 useless extension candidates. Maximal degree in co-relation 7763. Up to 1760 conditions per place. [2024-06-27 17:56:43,618 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 85 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2024-06-27 17:56:43,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 116 transitions, 838 flow [2024-06-27 17:56:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:56:43,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 17:56:43,619 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 544 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:56:43,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 116 transitions, 838 flow [2024-06-27 17:56:43,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 816 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 17:56:43,631 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 583 flow [2024-06-27 17:56:43,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=583, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2024-06-27 17:56:43,632 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2024-06-27 17:56:43,632 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 583 flow [2024-06-27 17:56:43,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:43,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:43,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:43,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:56:43,633 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:43,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2059358860, now seen corresponding path program 3 times [2024-06-27 17:56:43,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:43,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100002174] [2024-06-27 17:56:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:43,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:43,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:43,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100002174] [2024-06-27 17:56:43,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100002174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:43,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:43,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:43,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047575790] [2024-06-27 17:56:43,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:43,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:43,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:43,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:43,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:43,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:43,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 583 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:43,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:43,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:43,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:43,957 INFO L124 PetriNetUnfolderBase]: 1238/2045 cut-off events. [2024-06-27 17:56:43,957 INFO L125 PetriNetUnfolderBase]: For 8910/8910 co-relation queries the response was YES. [2024-06-27 17:56:43,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8092 conditions, 2045 events. 1238/2045 cut-off events. For 8910/8910 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11474 event pairs, 385 based on Foata normal form. 2/2032 useless extension candidates. Maximal degree in co-relation 8058. Up to 1721 conditions per place. [2024-06-27 17:56:43,968 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 74 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-27 17:56:43,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 856 flow [2024-06-27 17:56:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:56:43,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:56:43,970 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 583 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:56:43,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 856 flow [2024-06-27 17:56:43,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 113 transitions, 799 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:43,977 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 595 flow [2024-06-27 17:56:43,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=595, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-06-27 17:56:43,978 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 38 predicate places. [2024-06-27 17:56:43,978 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 595 flow [2024-06-27 17:56:43,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:43,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:43,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:43,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:56:43,979 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:43,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:43,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1290631016, now seen corresponding path program 2 times [2024-06-27 17:56:43,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:43,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42927612] [2024-06-27 17:56:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:43,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:44,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:44,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42927612] [2024-06-27 17:56:44,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42927612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:44,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:44,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:44,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544298662] [2024-06-27 17:56:44,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:44,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:44,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:44,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:44,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:44,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:44,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 595 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:44,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:44,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:44,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:44,291 INFO L124 PetriNetUnfolderBase]: 1265/2149 cut-off events. [2024-06-27 17:56:44,291 INFO L125 PetriNetUnfolderBase]: For 10190/10190 co-relation queries the response was YES. [2024-06-27 17:56:44,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8379 conditions, 2149 events. 1265/2149 cut-off events. For 10190/10190 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12354 event pairs, 528 based on Foata normal form. 4/2128 useless extension candidates. Maximal degree in co-relation 8344. Up to 1794 conditions per place. [2024-06-27 17:56:44,324 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 85 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2024-06-27 17:56:44,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 116 transitions, 885 flow [2024-06-27 17:56:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:56:44,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:56:44,325 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 595 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:56:44,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 116 transitions, 885 flow [2024-06-27 17:56:44,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 116 transitions, 841 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:44,334 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 616 flow [2024-06-27 17:56:44,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=616, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2024-06-27 17:56:44,334 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 41 predicate places. [2024-06-27 17:56:44,335 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 616 flow [2024-06-27 17:56:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:44,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:44,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:44,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:56:44,335 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:44,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:44,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1654036160, now seen corresponding path program 3 times [2024-06-27 17:56:44,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:44,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464523804] [2024-06-27 17:56:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:44,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:44,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:44,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464523804] [2024-06-27 17:56:44,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464523804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:44,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:44,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:44,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248062151] [2024-06-27 17:56:44,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:44,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:44,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:44,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:44,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 616 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:44,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:44,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:44,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:44,642 INFO L124 PetriNetUnfolderBase]: 1257/2125 cut-off events. [2024-06-27 17:56:44,642 INFO L125 PetriNetUnfolderBase]: For 11522/11522 co-relation queries the response was YES. [2024-06-27 17:56:44,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8489 conditions, 2125 events. 1257/2125 cut-off events. For 11522/11522 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12231 event pairs, 463 based on Foata normal form. 4/2104 useless extension candidates. Maximal degree in co-relation 8452. Up to 1697 conditions per place. [2024-06-27 17:56:44,654 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 83 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-27 17:56:44,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 119 transitions, 918 flow [2024-06-27 17:56:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:56:44,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 17:56:44,656 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 616 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:56:44,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 119 transitions, 918 flow [2024-06-27 17:56:44,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 871 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:44,668 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 648 flow [2024-06-27 17:56:44,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=648, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2024-06-27 17:56:44,669 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2024-06-27 17:56:44,669 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 648 flow [2024-06-27 17:56:44,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:44,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:44,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:44,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:56:44,670 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:44,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:44,670 INFO L85 PathProgramCache]: Analyzing trace with hash 595362815, now seen corresponding path program 1 times [2024-06-27 17:56:44,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:44,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227966950] [2024-06-27 17:56:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:44,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:44,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:44,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227966950] [2024-06-27 17:56:44,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227966950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:44,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:44,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:44,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406675249] [2024-06-27 17:56:44,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:44,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:44,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:44,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:44,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:44,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:44,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 648 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:44,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:44,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:44,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:44,952 INFO L124 PetriNetUnfolderBase]: 1159/2047 cut-off events. [2024-06-27 17:56:44,952 INFO L125 PetriNetUnfolderBase]: For 13047/13047 co-relation queries the response was YES. [2024-06-27 17:56:44,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8408 conditions, 2047 events. 1159/2047 cut-off events. For 13047/13047 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12120 event pairs, 456 based on Foata normal form. 2/2025 useless extension candidates. Maximal degree in co-relation 8370. Up to 1630 conditions per place. [2024-06-27 17:56:44,966 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 78 selfloop transitions, 17 changer transitions 0/115 dead transitions. [2024-06-27 17:56:44,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 115 transitions, 952 flow [2024-06-27 17:56:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:56:44,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-27 17:56:44,967 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 648 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:56:44,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 115 transitions, 952 flow [2024-06-27 17:56:44,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 115 transitions, 891 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:44,982 INFO L231 Difference]: Finished difference. Result has 93 places, 96 transitions, 677 flow [2024-06-27 17:56:44,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=677, PETRI_PLACES=93, PETRI_TRANSITIONS=96} [2024-06-27 17:56:44,983 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 44 predicate places. [2024-06-27 17:56:44,984 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 96 transitions, 677 flow [2024-06-27 17:56:44,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:44,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:44,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:44,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:56:44,984 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:44,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash 549265279, now seen corresponding path program 2 times [2024-06-27 17:56:44,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:44,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033286668] [2024-06-27 17:56:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:44,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:45,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:45,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033286668] [2024-06-27 17:56:45,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033286668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:45,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:45,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:45,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761652591] [2024-06-27 17:56:45,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:45,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:45,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:45,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:45,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:45,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:45,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 96 transitions, 677 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:45,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:45,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:45,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:45,317 INFO L124 PetriNetUnfolderBase]: 1151/2019 cut-off events. [2024-06-27 17:56:45,318 INFO L125 PetriNetUnfolderBase]: For 14167/14167 co-relation queries the response was YES. [2024-06-27 17:56:45,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8507 conditions, 2019 events. 1151/2019 cut-off events. For 14167/14167 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11901 event pairs, 444 based on Foata normal form. 2/1995 useless extension candidates. Maximal degree in co-relation 8468. Up to 1634 conditions per place. [2024-06-27 17:56:45,331 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 77 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-06-27 17:56:45,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 111 transitions, 895 flow [2024-06-27 17:56:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:56:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:56:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-27 17:56:45,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-27 17:56:45,333 INFO L175 Difference]: Start difference. First operand has 93 places, 96 transitions, 677 flow. Second operand 4 states and 123 transitions. [2024-06-27 17:56:45,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 111 transitions, 895 flow [2024-06-27 17:56:45,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 111 transitions, 867 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 17:56:45,346 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 688 flow [2024-06-27 17:56:45,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=688, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2024-06-27 17:56:45,348 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2024-06-27 17:56:45,348 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 688 flow [2024-06-27 17:56:45,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:45,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:45,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:45,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:56:45,349 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:45,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:45,349 INFO L85 PathProgramCache]: Analyzing trace with hash -397479149, now seen corresponding path program 1 times [2024-06-27 17:56:45,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:45,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740682046] [2024-06-27 17:56:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:45,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:45,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:45,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740682046] [2024-06-27 17:56:45,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740682046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:45,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:45,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:45,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433087394] [2024-06-27 17:56:45,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:45,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:45,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:45,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:45,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:45,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:45,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 688 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:45,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:45,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:45,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:45,788 INFO L124 PetriNetUnfolderBase]: 1608/2602 cut-off events. [2024-06-27 17:56:45,789 INFO L125 PetriNetUnfolderBase]: For 21388/21388 co-relation queries the response was YES. [2024-06-27 17:56:45,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11439 conditions, 2602 events. 1608/2602 cut-off events. For 21388/21388 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15040 event pairs, 258 based on Foata normal form. 18/2615 useless extension candidates. Maximal degree in co-relation 11398. Up to 1859 conditions per place. [2024-06-27 17:56:45,803 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 114 selfloop transitions, 28 changer transitions 0/156 dead transitions. [2024-06-27 17:56:45,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 156 transitions, 1236 flow [2024-06-27 17:56:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:56:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:56:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-06-27 17:56:45,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-06-27 17:56:45,805 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 688 flow. Second operand 8 states and 245 transitions. [2024-06-27 17:56:45,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 156 transitions, 1236 flow [2024-06-27 17:56:45,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 156 transitions, 1208 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:45,827 INFO L231 Difference]: Finished difference. Result has 102 places, 102 transitions, 797 flow [2024-06-27 17:56:45,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=797, PETRI_PLACES=102, PETRI_TRANSITIONS=102} [2024-06-27 17:56:45,828 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 53 predicate places. [2024-06-27 17:56:45,828 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 102 transitions, 797 flow [2024-06-27 17:56:45,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:45,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:45,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:45,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:56:45,828 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:45,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:45,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1338798221, now seen corresponding path program 2 times [2024-06-27 17:56:45,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:45,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142994868] [2024-06-27 17:56:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:45,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:45,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:45,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142994868] [2024-06-27 17:56:45,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142994868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:45,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:45,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:45,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982484352] [2024-06-27 17:56:45,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:45,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:45,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:45,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 797 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:45,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:45,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:45,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:46,314 INFO L124 PetriNetUnfolderBase]: 1562/2676 cut-off events. [2024-06-27 17:56:46,315 INFO L125 PetriNetUnfolderBase]: For 22591/22591 co-relation queries the response was YES. [2024-06-27 17:56:46,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11537 conditions, 2676 events. 1562/2676 cut-off events. For 22591/22591 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16175 event pairs, 574 based on Foata normal form. 24/2672 useless extension candidates. Maximal degree in co-relation 11494. Up to 2048 conditions per place. [2024-06-27 17:56:46,332 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 108 selfloop transitions, 24 changer transitions 0/146 dead transitions. [2024-06-27 17:56:46,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 146 transitions, 1198 flow [2024-06-27 17:56:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 17:56:46,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-06-27 17:56:46,334 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 797 flow. Second operand 7 states and 213 transitions. [2024-06-27 17:56:46,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 146 transitions, 1198 flow [2024-06-27 17:56:46,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 146 transitions, 1126 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:46,363 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 804 flow [2024-06-27 17:56:46,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=804, PETRI_PLACES=104, PETRI_TRANSITIONS=103} [2024-06-27 17:56:46,364 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 55 predicate places. [2024-06-27 17:56:46,364 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 804 flow [2024-06-27 17:56:46,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:46,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:46,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:46,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:56:46,365 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:46,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:46,365 INFO L85 PathProgramCache]: Analyzing trace with hash -781999401, now seen corresponding path program 3 times [2024-06-27 17:56:46,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:46,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876775690] [2024-06-27 17:56:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:46,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:46,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:46,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876775690] [2024-06-27 17:56:46,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876775690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:46,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:46,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:46,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815627439] [2024-06-27 17:56:46,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:46,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:46,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:46,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:46,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:46,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 804 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:46,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:46,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:46,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:46,798 INFO L124 PetriNetUnfolderBase]: 1656/2707 cut-off events. [2024-06-27 17:56:46,798 INFO L125 PetriNetUnfolderBase]: For 22785/22785 co-relation queries the response was YES. [2024-06-27 17:56:46,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11932 conditions, 2707 events. 1656/2707 cut-off events. For 22785/22785 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15872 event pairs, 390 based on Foata normal form. 16/2716 useless extension candidates. Maximal degree in co-relation 11888. Up to 2241 conditions per place. [2024-06-27 17:56:46,812 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 104 selfloop transitions, 26 changer transitions 0/144 dead transitions. [2024-06-27 17:56:46,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 144 transitions, 1192 flow [2024-06-27 17:56:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:56:46,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 17:56:46,814 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 804 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:56:46,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 144 transitions, 1192 flow [2024-06-27 17:56:46,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 144 transitions, 1148 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:46,836 INFO L231 Difference]: Finished difference. Result has 106 places, 104 transitions, 839 flow [2024-06-27 17:56:46,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=839, PETRI_PLACES=106, PETRI_TRANSITIONS=104} [2024-06-27 17:56:46,837 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 57 predicate places. [2024-06-27 17:56:46,837 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 104 transitions, 839 flow [2024-06-27 17:56:46,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:46,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:46,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:46,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:56:46,838 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:46,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash -775328201, now seen corresponding path program 1 times [2024-06-27 17:56:46,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:46,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144320189] [2024-06-27 17:56:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:46,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:46,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:46,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144320189] [2024-06-27 17:56:46,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144320189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:46,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:46,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:46,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672002401] [2024-06-27 17:56:46,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:46,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:46,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:46,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:46,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 104 transitions, 839 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:46,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:46,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:46,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:47,267 INFO L124 PetriNetUnfolderBase]: 1723/2948 cut-off events. [2024-06-27 17:56:47,267 INFO L125 PetriNetUnfolderBase]: For 25927/25927 co-relation queries the response was YES. [2024-06-27 17:56:47,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12701 conditions, 2948 events. 1723/2948 cut-off events. For 25927/25927 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18267 event pairs, 605 based on Foata normal form. 12/2930 useless extension candidates. Maximal degree in co-relation 12656. Up to 2093 conditions per place. [2024-06-27 17:56:47,337 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 105 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2024-06-27 17:56:47,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 148 transitions, 1249 flow [2024-06-27 17:56:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:56:47,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 17:56:47,338 INFO L175 Difference]: Start difference. First operand has 106 places, 104 transitions, 839 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:56:47,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 148 transitions, 1249 flow [2024-06-27 17:56:47,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 148 transitions, 1190 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:47,366 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 866 flow [2024-06-27 17:56:47,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=866, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2024-06-27 17:56:47,367 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 59 predicate places. [2024-06-27 17:56:47,367 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 866 flow [2024-06-27 17:56:47,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:47,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:47,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:47,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:56:47,368 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:47,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1835208493, now seen corresponding path program 1 times [2024-06-27 17:56:47,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:47,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296670462] [2024-06-27 17:56:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:47,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:47,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296670462] [2024-06-27 17:56:47,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296670462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:47,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:47,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:47,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43565724] [2024-06-27 17:56:47,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:47,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:47,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:47,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:47,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:47,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 866 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:47,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:47,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:47,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:47,691 INFO L124 PetriNetUnfolderBase]: 1645/2852 cut-off events. [2024-06-27 17:56:47,692 INFO L125 PetriNetUnfolderBase]: For 25479/25485 co-relation queries the response was YES. [2024-06-27 17:56:47,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12361 conditions, 2852 events. 1645/2852 cut-off events. For 25479/25485 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17791 event pairs, 499 based on Foata normal form. 6/2831 useless extension candidates. Maximal degree in co-relation 12315. Up to 2353 conditions per place. [2024-06-27 17:56:47,710 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 92 selfloop transitions, 27 changer transitions 0/141 dead transitions. [2024-06-27 17:56:47,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 141 transitions, 1281 flow [2024-06-27 17:56:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:56:47,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 17:56:47,711 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 866 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:56:47,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 141 transitions, 1281 flow [2024-06-27 17:56:47,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 141 transitions, 1220 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:47,745 INFO L231 Difference]: Finished difference. Result has 111 places, 116 transitions, 964 flow [2024-06-27 17:56:47,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=964, PETRI_PLACES=111, PETRI_TRANSITIONS=116} [2024-06-27 17:56:47,746 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 62 predicate places. [2024-06-27 17:56:47,746 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 116 transitions, 964 flow [2024-06-27 17:56:47,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:47,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:47,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:47,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:56:47,746 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:47,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash 942496471, now seen corresponding path program 4 times [2024-06-27 17:56:47,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:47,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346262118] [2024-06-27 17:56:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:47,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:47,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:47,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346262118] [2024-06-27 17:56:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346262118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:47,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:47,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:47,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349304352] [2024-06-27 17:56:47,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:47,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:47,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:47,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 116 transitions, 964 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:47,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:47,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:47,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:48,148 INFO L124 PetriNetUnfolderBase]: 1826/3022 cut-off events. [2024-06-27 17:56:48,148 INFO L125 PetriNetUnfolderBase]: For 30090/30090 co-relation queries the response was YES. [2024-06-27 17:56:48,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13537 conditions, 3022 events. 1826/3022 cut-off events. For 30090/30090 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18430 event pairs, 578 based on Foata normal form. 16/3013 useless extension candidates. Maximal degree in co-relation 13489. Up to 2507 conditions per place. [2024-06-27 17:56:48,167 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 114 selfloop transitions, 26 changer transitions 0/154 dead transitions. [2024-06-27 17:56:48,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 154 transitions, 1370 flow [2024-06-27 17:56:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:56:48,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-27 17:56:48,168 INFO L175 Difference]: Start difference. First operand has 111 places, 116 transitions, 964 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:56:48,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 154 transitions, 1370 flow [2024-06-27 17:56:48,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 154 transitions, 1340 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 17:56:48,208 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 1017 flow [2024-06-27 17:56:48,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1017, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2024-06-27 17:56:48,209 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 68 predicate places. [2024-06-27 17:56:48,209 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 1017 flow [2024-06-27 17:56:48,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:48,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:48,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:48,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:56:48,209 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:48,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:48,210 INFO L85 PathProgramCache]: Analyzing trace with hash 161187133, now seen corresponding path program 2 times [2024-06-27 17:56:48,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:48,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651114198] [2024-06-27 17:56:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:48,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:48,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:48,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651114198] [2024-06-27 17:56:48,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651114198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:48,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:48,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:48,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497104612] [2024-06-27 17:56:48,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:48,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:48,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:48,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:48,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:48,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:48,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 1017 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:48,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:48,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:48,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:48,619 INFO L124 PetriNetUnfolderBase]: 1893/3240 cut-off events. [2024-06-27 17:56:48,620 INFO L125 PetriNetUnfolderBase]: For 33894/33894 co-relation queries the response was YES. [2024-06-27 17:56:48,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14450 conditions, 3240 events. 1893/3240 cut-off events. For 33894/33894 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20523 event pairs, 698 based on Foata normal form. 12/3219 useless extension candidates. Maximal degree in co-relation 14400. Up to 2491 conditions per place. [2024-06-27 17:56:48,639 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 116 selfloop transitions, 28 changer transitions 0/158 dead transitions. [2024-06-27 17:56:48,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 158 transitions, 1447 flow [2024-06-27 17:56:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:56:48,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 17:56:48,641 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 1017 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:56:48,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 158 transitions, 1447 flow [2024-06-27 17:56:48,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 158 transitions, 1384 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:48,680 INFO L231 Difference]: Finished difference. Result has 119 places, 118 transitions, 1042 flow [2024-06-27 17:56:48,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1042, PETRI_PLACES=119, PETRI_TRANSITIONS=118} [2024-06-27 17:56:48,680 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 70 predicate places. [2024-06-27 17:56:48,680 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 118 transitions, 1042 flow [2024-06-27 17:56:48,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:48,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:48,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:48,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:56:48,681 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:48,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:48,681 INFO L85 PathProgramCache]: Analyzing trace with hash 595848759, now seen corresponding path program 3 times [2024-06-27 17:56:48,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:48,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829372032] [2024-06-27 17:56:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:48,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:48,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:48,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829372032] [2024-06-27 17:56:48,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829372032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:48,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:48,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:48,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365419691] [2024-06-27 17:56:48,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:48,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:48,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:48,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:48,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:48,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 118 transitions, 1042 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:48,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:48,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:48,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:49,115 INFO L124 PetriNetUnfolderBase]: 1873/3174 cut-off events. [2024-06-27 17:56:49,115 INFO L125 PetriNetUnfolderBase]: For 32233/32233 co-relation queries the response was YES. [2024-06-27 17:56:49,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13986 conditions, 3174 events. 1873/3174 cut-off events. For 32233/32233 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19880 event pairs, 534 based on Foata normal form. 12/3163 useless extension candidates. Maximal degree in co-relation 13935. Up to 1912 conditions per place. [2024-06-27 17:56:49,139 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 109 selfloop transitions, 35 changer transitions 0/158 dead transitions. [2024-06-27 17:56:49,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 158 transitions, 1410 flow [2024-06-27 17:56:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:56:49,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-27 17:56:49,140 INFO L175 Difference]: Start difference. First operand has 119 places, 118 transitions, 1042 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:56:49,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 158 transitions, 1410 flow [2024-06-27 17:56:49,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 158 transitions, 1338 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:49,185 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 1004 flow [2024-06-27 17:56:49,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1004, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2024-06-27 17:56:49,185 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 71 predicate places. [2024-06-27 17:56:49,186 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 1004 flow [2024-06-27 17:56:49,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:49,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:49,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:49,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:56:49,186 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:49,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash -438357057, now seen corresponding path program 2 times [2024-06-27 17:56:49,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:49,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858937173] [2024-06-27 17:56:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:49,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:49,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:49,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858937173] [2024-06-27 17:56:49,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858937173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:49,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:49,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418102943] [2024-06-27 17:56:49,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:49,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:49,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:49,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:49,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:49,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 1004 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:49,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:49,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:49,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:49,568 INFO L124 PetriNetUnfolderBase]: 1759/2980 cut-off events. [2024-06-27 17:56:49,568 INFO L125 PetriNetUnfolderBase]: For 29982/29982 co-relation queries the response was YES. [2024-06-27 17:56:49,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13403 conditions, 2980 events. 1759/2980 cut-off events. For 29982/29982 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18688 event pairs, 407 based on Foata normal form. 2/2955 useless extension candidates. Maximal degree in co-relation 13351. Up to 2552 conditions per place. [2024-06-27 17:56:49,586 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 92 selfloop transitions, 24 changer transitions 0/138 dead transitions. [2024-06-27 17:56:49,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 138 transitions, 1306 flow [2024-06-27 17:56:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:56:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:56:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 17:56:49,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7055555555555556 [2024-06-27 17:56:49,588 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 1004 flow. Second operand 4 states and 127 transitions. [2024-06-27 17:56:49,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 138 transitions, 1306 flow [2024-06-27 17:56:49,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 138 transitions, 1218 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:49,628 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 1017 flow [2024-06-27 17:56:49,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1017, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2024-06-27 17:56:49,629 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 70 predicate places. [2024-06-27 17:56:49,629 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 1017 flow [2024-06-27 17:56:49,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:49,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:49,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:49,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:56:49,630 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:49,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:49,630 INFO L85 PathProgramCache]: Analyzing trace with hash 20114343, now seen corresponding path program 3 times [2024-06-27 17:56:49,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:49,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058515094] [2024-06-27 17:56:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:49,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:49,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:49,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058515094] [2024-06-27 17:56:49,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058515094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:49,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:49,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494574367] [2024-06-27 17:56:49,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:49,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:49,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:49,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:49,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:49,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:49,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:49,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:49,952 INFO L124 PetriNetUnfolderBase]: 1753/2951 cut-off events. [2024-06-27 17:56:49,952 INFO L125 PetriNetUnfolderBase]: For 28821/28821 co-relation queries the response was YES. [2024-06-27 17:56:49,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12982 conditions, 2951 events. 1753/2951 cut-off events. For 28821/28821 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18324 event pairs, 407 based on Foata normal form. 2/2915 useless extension candidates. Maximal degree in co-relation 12929. Up to 2517 conditions per place. [2024-06-27 17:56:49,970 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 89 selfloop transitions, 30 changer transitions 0/141 dead transitions. [2024-06-27 17:56:49,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 141 transitions, 1305 flow [2024-06-27 17:56:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-27 17:56:49,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2024-06-27 17:56:49,971 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 1017 flow. Second operand 5 states and 152 transitions. [2024-06-27 17:56:49,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 141 transitions, 1305 flow [2024-06-27 17:56:50,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 141 transitions, 1260 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:50,017 INFO L231 Difference]: Finished difference. Result has 122 places, 120 transitions, 1044 flow [2024-06-27 17:56:50,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1044, PETRI_PLACES=122, PETRI_TRANSITIONS=120} [2024-06-27 17:56:50,018 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2024-06-27 17:56:50,018 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 120 transitions, 1044 flow [2024-06-27 17:56:50,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:50,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:50,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:50,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:56:50,018 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:50,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:50,019 INFO L85 PathProgramCache]: Analyzing trace with hash -152428561, now seen corresponding path program 1 times [2024-06-27 17:56:50,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:50,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114153011] [2024-06-27 17:56:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:50,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:50,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114153011] [2024-06-27 17:56:50,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114153011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:50,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:50,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:50,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114969055] [2024-06-27 17:56:50,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:50,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:50,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:50,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:50,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 120 transitions, 1044 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:50,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:50,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:50,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:50,360 INFO L124 PetriNetUnfolderBase]: 1744/2940 cut-off events. [2024-06-27 17:56:50,360 INFO L125 PetriNetUnfolderBase]: For 30357/30357 co-relation queries the response was YES. [2024-06-27 17:56:50,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13003 conditions, 2940 events. 1744/2940 cut-off events. For 30357/30357 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18256 event pairs, 406 based on Foata normal form. 2/2900 useless extension candidates. Maximal degree in co-relation 12949. Up to 2571 conditions per place. [2024-06-27 17:56:50,377 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 103 selfloop transitions, 10 changer transitions 0/135 dead transitions. [2024-06-27 17:56:50,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 135 transitions, 1320 flow [2024-06-27 17:56:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:56:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:56:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-27 17:56:50,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-27 17:56:50,378 INFO L175 Difference]: Start difference. First operand has 122 places, 120 transitions, 1044 flow. Second operand 4 states and 119 transitions. [2024-06-27 17:56:50,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 135 transitions, 1320 flow [2024-06-27 17:56:50,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 135 transitions, 1251 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:50,416 INFO L231 Difference]: Finished difference. Result has 122 places, 122 transitions, 1024 flow [2024-06-27 17:56:50,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1024, PETRI_PLACES=122, PETRI_TRANSITIONS=122} [2024-06-27 17:56:50,417 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2024-06-27 17:56:50,417 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 122 transitions, 1024 flow [2024-06-27 17:56:50,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:50,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:50,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:50,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:56:50,417 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:50,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1024795224, now seen corresponding path program 1 times [2024-06-27 17:56:50,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:50,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659378761] [2024-06-27 17:56:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:50,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:50,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:50,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659378761] [2024-06-27 17:56:50,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659378761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:50,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:50,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:50,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170563207] [2024-06-27 17:56:50,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:50,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:50,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:50,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 122 transitions, 1024 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:50,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:50,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:50,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:50,755 INFO L124 PetriNetUnfolderBase]: 1909/3166 cut-off events. [2024-06-27 17:56:50,755 INFO L125 PetriNetUnfolderBase]: For 31333/31333 co-relation queries the response was YES. [2024-06-27 17:56:50,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13951 conditions, 3166 events. 1909/3166 cut-off events. For 31333/31333 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19571 event pairs, 439 based on Foata normal form. 1/3156 useless extension candidates. Maximal degree in co-relation 13897. Up to 2753 conditions per place. [2024-06-27 17:56:50,772 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 119 selfloop transitions, 32 changer transitions 0/165 dead transitions. [2024-06-27 17:56:50,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 165 transitions, 1630 flow [2024-06-27 17:56:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:50,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:56:50,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 17:56:50,774 INFO L175 Difference]: Start difference. First operand has 122 places, 122 transitions, 1024 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:56:50,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 165 transitions, 1630 flow [2024-06-27 17:56:50,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 165 transitions, 1597 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:50,826 INFO L231 Difference]: Finished difference. Result has 127 places, 136 transitions, 1222 flow [2024-06-27 17:56:50,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1222, PETRI_PLACES=127, PETRI_TRANSITIONS=136} [2024-06-27 17:56:50,826 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 78 predicate places. [2024-06-27 17:56:50,826 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 136 transitions, 1222 flow [2024-06-27 17:56:50,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:50,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:50,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:50,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:56:50,827 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:50,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:50,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1873233888, now seen corresponding path program 2 times [2024-06-27 17:56:50,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:50,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158004768] [2024-06-27 17:56:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:50,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:50,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:50,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158004768] [2024-06-27 17:56:50,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158004768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:50,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:50,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:50,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000236462] [2024-06-27 17:56:50,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:50,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:50,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:50,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:50,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 136 transitions, 1222 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:50,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:50,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:50,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:51,285 INFO L124 PetriNetUnfolderBase]: 1931/3389 cut-off events. [2024-06-27 17:56:51,285 INFO L125 PetriNetUnfolderBase]: For 34947/34947 co-relation queries the response was YES. [2024-06-27 17:56:51,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14820 conditions, 3389 events. 1931/3389 cut-off events. For 34947/34947 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21920 event pairs, 727 based on Foata normal form. 1/3356 useless extension candidates. Maximal degree in co-relation 14764. Up to 2820 conditions per place. [2024-06-27 17:56:51,301 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 126 selfloop transitions, 27 changer transitions 0/167 dead transitions. [2024-06-27 17:56:51,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 167 transitions, 1656 flow [2024-06-27 17:56:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 17:56:51,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-27 17:56:51,302 INFO L175 Difference]: Start difference. First operand has 127 places, 136 transitions, 1222 flow. Second operand 6 states and 173 transitions. [2024-06-27 17:56:51,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 167 transitions, 1656 flow [2024-06-27 17:56:51,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 167 transitions, 1606 flow, removed 25 selfloop flow, removed 0 redundant places. [2024-06-27 17:56:51,352 INFO L231 Difference]: Finished difference. Result has 133 places, 142 transitions, 1311 flow [2024-06-27 17:56:51,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1311, PETRI_PLACES=133, PETRI_TRANSITIONS=142} [2024-06-27 17:56:51,353 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 84 predicate places. [2024-06-27 17:56:51,353 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 142 transitions, 1311 flow [2024-06-27 17:56:51,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:51,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:51,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:51,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:56:51,353 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:51,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:51,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1049634044, now seen corresponding path program 3 times [2024-06-27 17:56:51,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:51,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796192683] [2024-06-27 17:56:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:51,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:51,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:51,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796192683] [2024-06-27 17:56:51,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796192683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:51,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:51,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:51,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472775807] [2024-06-27 17:56:51,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:51,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:51,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:51,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:51,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:51,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:51,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 142 transitions, 1311 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:51,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:51,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:51,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:51,692 INFO L124 PetriNetUnfolderBase]: 1942/3215 cut-off events. [2024-06-27 17:56:51,692 INFO L125 PetriNetUnfolderBase]: For 36916/36916 co-relation queries the response was YES. [2024-06-27 17:56:51,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14784 conditions, 3215 events. 1942/3215 cut-off events. For 36916/36916 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19944 event pairs, 438 based on Foata normal form. 1/3208 useless extension candidates. Maximal degree in co-relation 14725. Up to 2792 conditions per place. [2024-06-27 17:56:51,712 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 119 selfloop transitions, 38 changer transitions 0/171 dead transitions. [2024-06-27 17:56:51,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 171 transitions, 1829 flow [2024-06-27 17:56:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:56:51,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:56:51,713 INFO L175 Difference]: Start difference. First operand has 133 places, 142 transitions, 1311 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:56:51,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 171 transitions, 1829 flow [2024-06-27 17:56:51,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 171 transitions, 1760 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:51,766 INFO L231 Difference]: Finished difference. Result has 135 places, 145 transitions, 1360 flow [2024-06-27 17:56:51,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1360, PETRI_PLACES=135, PETRI_TRANSITIONS=145} [2024-06-27 17:56:51,767 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2024-06-27 17:56:51,767 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 145 transitions, 1360 flow [2024-06-27 17:56:51,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:51,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:51,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:51,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:56:51,768 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:51,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:51,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1061061884, now seen corresponding path program 4 times [2024-06-27 17:56:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:51,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341571637] [2024-06-27 17:56:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:51,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:51,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341571637] [2024-06-27 17:56:51,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341571637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:51,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:51,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:51,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791216218] [2024-06-27 17:56:51,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:51,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:51,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:51,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:51,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:51,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 145 transitions, 1360 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:51,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:51,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:51,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:52,130 INFO L124 PetriNetUnfolderBase]: 1953/3234 cut-off events. [2024-06-27 17:56:52,131 INFO L125 PetriNetUnfolderBase]: For 39012/39012 co-relation queries the response was YES. [2024-06-27 17:56:52,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14984 conditions, 3234 events. 1953/3234 cut-off events. For 39012/39012 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20077 event pairs, 438 based on Foata normal form. 1/3227 useless extension candidates. Maximal degree in co-relation 14925. Up to 2804 conditions per place. [2024-06-27 17:56:52,152 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 115 selfloop transitions, 42 changer transitions 0/171 dead transitions. [2024-06-27 17:56:52,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 171 transitions, 1831 flow [2024-06-27 17:56:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:52,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 17:56:52,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:56:52,153 INFO L175 Difference]: Start difference. First operand has 135 places, 145 transitions, 1360 flow. Second operand 6 states and 171 transitions. [2024-06-27 17:56:52,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 171 transitions, 1831 flow [2024-06-27 17:56:52,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 171 transitions, 1719 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:52,215 INFO L231 Difference]: Finished difference. Result has 137 places, 149 transitions, 1389 flow [2024-06-27 17:56:52,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1389, PETRI_PLACES=137, PETRI_TRANSITIONS=149} [2024-06-27 17:56:52,215 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 88 predicate places. [2024-06-27 17:56:52,215 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 149 transitions, 1389 flow [2024-06-27 17:56:52,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:52,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:52,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:52,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:56:52,216 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:52,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:52,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1938773248, now seen corresponding path program 5 times [2024-06-27 17:56:52,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:52,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989692861] [2024-06-27 17:56:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:52,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:52,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:52,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989692861] [2024-06-27 17:56:52,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989692861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:52,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:52,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:52,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25603035] [2024-06-27 17:56:52,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:52,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:52,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:52,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:52,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:52,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:52,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 149 transitions, 1389 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:52,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:52,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:52,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:52,614 INFO L124 PetriNetUnfolderBase]: 1950/3278 cut-off events. [2024-06-27 17:56:52,614 INFO L125 PetriNetUnfolderBase]: For 40272/40272 co-relation queries the response was YES. [2024-06-27 17:56:52,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14955 conditions, 3278 events. 1950/3278 cut-off events. For 40272/40272 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20512 event pairs, 467 based on Foata normal form. 1/3272 useless extension candidates. Maximal degree in co-relation 14896. Up to 2765 conditions per place. [2024-06-27 17:56:52,634 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 123 selfloop transitions, 49 changer transitions 0/186 dead transitions. [2024-06-27 17:56:52,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 186 transitions, 1879 flow [2024-06-27 17:56:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:56:52,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-27 17:56:52,635 INFO L175 Difference]: Start difference. First operand has 137 places, 149 transitions, 1389 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:56:52,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 186 transitions, 1879 flow [2024-06-27 17:56:52,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 186 transitions, 1797 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:52,693 INFO L231 Difference]: Finished difference. Result has 142 places, 149 transitions, 1431 flow [2024-06-27 17:56:52,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1431, PETRI_PLACES=142, PETRI_TRANSITIONS=149} [2024-06-27 17:56:52,693 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 93 predicate places. [2024-06-27 17:56:52,694 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 149 transitions, 1431 flow [2024-06-27 17:56:52,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:52,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:52,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:52,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:56:52,694 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:52,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:52,694 INFO L85 PathProgramCache]: Analyzing trace with hash -437005410, now seen corresponding path program 6 times [2024-06-27 17:56:52,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:52,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282168484] [2024-06-27 17:56:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:52,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:52,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:52,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282168484] [2024-06-27 17:56:52,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282168484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:52,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:52,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:52,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341556569] [2024-06-27 17:56:52,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:52,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:52,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:52,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:52,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:52,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 149 transitions, 1431 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:52,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:52,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:52,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:53,111 INFO L124 PetriNetUnfolderBase]: 1947/3247 cut-off events. [2024-06-27 17:56:53,111 INFO L125 PetriNetUnfolderBase]: For 42971/42971 co-relation queries the response was YES. [2024-06-27 17:56:53,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15035 conditions, 3247 events. 1947/3247 cut-off events. For 42971/42971 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20341 event pairs, 453 based on Foata normal form. 1/3229 useless extension candidates. Maximal degree in co-relation 14975. Up to 2762 conditions per place. [2024-06-27 17:56:53,133 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 109 selfloop transitions, 47 changer transitions 0/170 dead transitions. [2024-06-27 17:56:53,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 170 transitions, 1793 flow [2024-06-27 17:56:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 17:56:53,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6711111111111111 [2024-06-27 17:56:53,134 INFO L175 Difference]: Start difference. First operand has 142 places, 149 transitions, 1431 flow. Second operand 5 states and 151 transitions. [2024-06-27 17:56:53,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 170 transitions, 1793 flow [2024-06-27 17:56:53,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 170 transitions, 1653 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:53,193 INFO L231 Difference]: Finished difference. Result has 140 places, 149 transitions, 1395 flow [2024-06-27 17:56:53,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1395, PETRI_PLACES=140, PETRI_TRANSITIONS=149} [2024-06-27 17:56:53,194 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 91 predicate places. [2024-06-27 17:56:53,194 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 149 transitions, 1395 flow [2024-06-27 17:56:53,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:56:53,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:53,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:53,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:56:53,194 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:53,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:53,195 INFO L85 PathProgramCache]: Analyzing trace with hash 910205694, now seen corresponding path program 1 times [2024-06-27 17:56:53,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:53,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213941603] [2024-06-27 17:56:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:53,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:53,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:53,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213941603] [2024-06-27 17:56:53,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213941603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:53,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:53,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:53,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009996297] [2024-06-27 17:56:53,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:53,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:53,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:53,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:53,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 149 transitions, 1395 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:53,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:53,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:53,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:53,646 INFO L124 PetriNetUnfolderBase]: 1922/3399 cut-off events. [2024-06-27 17:56:53,646 INFO L125 PetriNetUnfolderBase]: For 47349/47353 co-relation queries the response was YES. [2024-06-27 17:56:53,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15342 conditions, 3399 events. 1922/3399 cut-off events. For 47349/47353 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22469 event pairs, 648 based on Foata normal form. 12/3380 useless extension candidates. Maximal degree in co-relation 15282. Up to 2563 conditions per place. [2024-06-27 17:56:53,663 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 125 selfloop transitions, 24 changer transitions 0/183 dead transitions. [2024-06-27 17:56:53,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 183 transitions, 1871 flow [2024-06-27 17:56:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:53,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:56:53,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:56:53,665 INFO L175 Difference]: Start difference. First operand has 140 places, 149 transitions, 1395 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:56:53,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 183 transitions, 1871 flow [2024-06-27 17:56:53,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 183 transitions, 1769 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:53,724 INFO L231 Difference]: Finished difference. Result has 141 places, 151 transitions, 1373 flow [2024-06-27 17:56:53,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1373, PETRI_PLACES=141, PETRI_TRANSITIONS=151} [2024-06-27 17:56:53,724 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 92 predicate places. [2024-06-27 17:56:53,724 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 151 transitions, 1373 flow [2024-06-27 17:56:53,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:53,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:53,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:53,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:56:53,725 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:53,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash 913062654, now seen corresponding path program 2 times [2024-06-27 17:56:53,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:53,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315891714] [2024-06-27 17:56:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:53,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:53,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:53,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315891714] [2024-06-27 17:56:53,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315891714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:53,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:53,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:53,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482818476] [2024-06-27 17:56:53,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:53,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:53,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:53,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:53,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 151 transitions, 1373 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:53,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:53,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:53,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:54,148 INFO L124 PetriNetUnfolderBase]: 2000/3536 cut-off events. [2024-06-27 17:56:54,148 INFO L125 PetriNetUnfolderBase]: For 48905/48909 co-relation queries the response was YES. [2024-06-27 17:56:54,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15926 conditions, 3536 events. 2000/3536 cut-off events. For 48905/48909 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23624 event pairs, 726 based on Foata normal form. 14/3516 useless extension candidates. Maximal degree in co-relation 15866. Up to 2790 conditions per place. [2024-06-27 17:56:54,171 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 121 selfloop transitions, 22 changer transitions 0/177 dead transitions. [2024-06-27 17:56:54,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 177 transitions, 1747 flow [2024-06-27 17:56:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:54,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:56:54,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:56:54,172 INFO L175 Difference]: Start difference. First operand has 141 places, 151 transitions, 1373 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:56:54,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 177 transitions, 1747 flow [2024-06-27 17:56:54,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 177 transitions, 1718 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:54,216 INFO L231 Difference]: Finished difference. Result has 145 places, 152 transitions, 1410 flow [2024-06-27 17:56:54,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1410, PETRI_PLACES=145, PETRI_TRANSITIONS=152} [2024-06-27 17:56:54,217 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 96 predicate places. [2024-06-27 17:56:54,217 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 152 transitions, 1410 flow [2024-06-27 17:56:54,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:54,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:54,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:54,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:56:54,218 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:54,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:54,218 INFO L85 PathProgramCache]: Analyzing trace with hash -436996482, now seen corresponding path program 3 times [2024-06-27 17:56:54,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:54,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131010431] [2024-06-27 17:56:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:54,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:54,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:54,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131010431] [2024-06-27 17:56:54,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131010431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:54,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:54,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:54,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336354595] [2024-06-27 17:56:54,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:54,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:54,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:54,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:54,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:54,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 152 transitions, 1410 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:54,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:54,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:54,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:54,695 INFO L124 PetriNetUnfolderBase]: 1980/3351 cut-off events. [2024-06-27 17:56:54,695 INFO L125 PetriNetUnfolderBase]: For 46274/46274 co-relation queries the response was YES. [2024-06-27 17:56:54,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15550 conditions, 3351 events. 1980/3351 cut-off events. For 46274/46274 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21484 event pairs, 371 based on Foata normal form. 10/3355 useless extension candidates. Maximal degree in co-relation 15488. Up to 2740 conditions per place. [2024-06-27 17:56:54,719 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 124 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2024-06-27 17:56:54,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 177 transitions, 1772 flow [2024-06-27 17:56:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:56:54,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-27 17:56:54,724 INFO L175 Difference]: Start difference. First operand has 145 places, 152 transitions, 1410 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:56:54,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 177 transitions, 1772 flow [2024-06-27 17:56:54,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 177 transitions, 1726 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:54,801 INFO L231 Difference]: Finished difference. Result has 146 places, 152 transitions, 1411 flow [2024-06-27 17:56:54,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1411, PETRI_PLACES=146, PETRI_TRANSITIONS=152} [2024-06-27 17:56:54,801 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 97 predicate places. [2024-06-27 17:56:54,801 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 152 transitions, 1411 flow [2024-06-27 17:56:54,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:54,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:54,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:54,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:56:54,802 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:54,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1703879224, now seen corresponding path program 1 times [2024-06-27 17:56:54,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:54,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330860542] [2024-06-27 17:56:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:54,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:54,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:54,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330860542] [2024-06-27 17:56:54,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330860542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:54,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:54,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:54,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919878723] [2024-06-27 17:56:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:54,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:54,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:54,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:54,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:54,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 152 transitions, 1411 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:54,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:54,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:54,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:55,242 INFO L124 PetriNetUnfolderBase]: 2154/3701 cut-off events. [2024-06-27 17:56:55,242 INFO L125 PetriNetUnfolderBase]: For 45090/45090 co-relation queries the response was YES. [2024-06-27 17:56:55,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16611 conditions, 3701 events. 2154/3701 cut-off events. For 45090/45090 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 23804 event pairs, 605 based on Foata normal form. 1/3687 useless extension candidates. Maximal degree in co-relation 16548. Up to 3005 conditions per place. [2024-06-27 17:56:55,267 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 130 selfloop transitions, 55 changer transitions 0/199 dead transitions. [2024-06-27 17:56:55,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 199 transitions, 2119 flow [2024-06-27 17:56:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:56:55,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 17:56:55,268 INFO L175 Difference]: Start difference. First operand has 146 places, 152 transitions, 1411 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:56:55,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 199 transitions, 2119 flow [2024-06-27 17:56:55,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 199 transitions, 2075 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:55,328 INFO L231 Difference]: Finished difference. Result has 150 places, 167 transitions, 1671 flow [2024-06-27 17:56:55,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1671, PETRI_PLACES=150, PETRI_TRANSITIONS=167} [2024-06-27 17:56:55,328 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2024-06-27 17:56:55,329 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 167 transitions, 1671 flow [2024-06-27 17:56:55,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:55,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:55,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:55,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:56:55,329 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:55,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:55,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1556062234, now seen corresponding path program 2 times [2024-06-27 17:56:55,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:55,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050876144] [2024-06-27 17:56:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:55,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:55,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:55,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050876144] [2024-06-27 17:56:55,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050876144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:55,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:55,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:55,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284793832] [2024-06-27 17:56:55,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:55,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:55,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:55,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:55,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:55,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:55,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 167 transitions, 1671 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:55,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:55,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:55,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:55,808 INFO L124 PetriNetUnfolderBase]: 2204/3633 cut-off events. [2024-06-27 17:56:55,808 INFO L125 PetriNetUnfolderBase]: For 49910/49910 co-relation queries the response was YES. [2024-06-27 17:56:55,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17586 conditions, 3633 events. 2204/3633 cut-off events. For 49910/49910 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22992 event pairs, 453 based on Foata normal form. 2/3630 useless extension candidates. Maximal degree in co-relation 17521. Up to 3131 conditions per place. [2024-06-27 17:56:55,833 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 148 selfloop transitions, 54 changer transitions 0/216 dead transitions. [2024-06-27 17:56:55,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 216 transitions, 2407 flow [2024-06-27 17:56:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:56:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:56:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-06-27 17:56:55,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6197530864197531 [2024-06-27 17:56:55,845 INFO L175 Difference]: Start difference. First operand has 150 places, 167 transitions, 1671 flow. Second operand 9 states and 251 transitions. [2024-06-27 17:56:55,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 216 transitions, 2407 flow [2024-06-27 17:56:55,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 216 transitions, 2336 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:55,930 INFO L231 Difference]: Finished difference. Result has 157 places, 179 transitions, 1882 flow [2024-06-27 17:56:55,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1882, PETRI_PLACES=157, PETRI_TRANSITIONS=179} [2024-06-27 17:56:55,930 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 108 predicate places. [2024-06-27 17:56:55,931 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 179 transitions, 1882 flow [2024-06-27 17:56:55,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:55,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:55,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:55,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:56:55,931 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:55,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1596035316, now seen corresponding path program 3 times [2024-06-27 17:56:55,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:55,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481161741] [2024-06-27 17:56:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:55,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:56,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:56,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481161741] [2024-06-27 17:56:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481161741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:56,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:56,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:56,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631315478] [2024-06-27 17:56:56,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:56,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:56,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:56,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:56,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:56,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 179 transitions, 1882 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:56,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:56,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:56,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:56,418 INFO L124 PetriNetUnfolderBase]: 2198/3689 cut-off events. [2024-06-27 17:56:56,418 INFO L125 PetriNetUnfolderBase]: For 53796/53796 co-relation queries the response was YES. [2024-06-27 17:56:56,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18186 conditions, 3689 events. 2198/3689 cut-off events. For 53796/53796 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 23704 event pairs, 601 based on Foata normal form. 2/3674 useless extension candidates. Maximal degree in co-relation 18119. Up to 3125 conditions per place. [2024-06-27 17:56:56,444 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 143 selfloop transitions, 52 changer transitions 0/209 dead transitions. [2024-06-27 17:56:56,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 209 transitions, 2374 flow [2024-06-27 17:56:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:56:56,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 17:56:56,445 INFO L175 Difference]: Start difference. First operand has 157 places, 179 transitions, 1882 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:56:56,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 209 transitions, 2374 flow [2024-06-27 17:56:56,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 209 transitions, 2227 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:56,554 INFO L231 Difference]: Finished difference. Result has 159 places, 179 transitions, 1849 flow [2024-06-27 17:56:56,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1849, PETRI_PLACES=159, PETRI_TRANSITIONS=179} [2024-06-27 17:56:56,554 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 110 predicate places. [2024-06-27 17:56:56,554 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 179 transitions, 1849 flow [2024-06-27 17:56:56,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:56,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:56,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:56,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:56:56,555 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:56,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:56,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1556054298, now seen corresponding path program 1 times [2024-06-27 17:56:56,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:56,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051986622] [2024-06-27 17:56:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:56,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:56,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:56,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051986622] [2024-06-27 17:56:56,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051986622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:56,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:56,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:56,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407641580] [2024-06-27 17:56:56,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:56,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:56,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:56,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:56,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:56:56,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 179 transitions, 1849 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:56,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:56,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:56:56,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:57,031 INFO L124 PetriNetUnfolderBase]: 2176/3608 cut-off events. [2024-06-27 17:56:57,031 INFO L125 PetriNetUnfolderBase]: For 60019/60019 co-relation queries the response was YES. [2024-06-27 17:56:57,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18170 conditions, 3608 events. 2176/3608 cut-off events. For 60019/60019 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22928 event pairs, 440 based on Foata normal form. 10/3580 useless extension candidates. Maximal degree in co-relation 18101. Up to 2964 conditions per place. [2024-06-27 17:56:57,057 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 141 selfloop transitions, 37 changer transitions 0/211 dead transitions. [2024-06-27 17:56:57,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 211 transitions, 2307 flow [2024-06-27 17:56:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:56:57,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-27 17:56:57,059 INFO L175 Difference]: Start difference. First operand has 159 places, 179 transitions, 1849 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:56:57,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 211 transitions, 2307 flow [2024-06-27 17:56:57,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 211 transitions, 2203 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:56:57,159 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1839 flow [2024-06-27 17:56:57,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1839, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2024-06-27 17:56:57,160 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 111 predicate places. [2024-06-27 17:56:57,160 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1839 flow [2024-06-27 17:56:57,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:57,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:57,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:57,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:56:57,161 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:57,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:57,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1821081356, now seen corresponding path program 4 times [2024-06-27 17:56:57,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:57,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138010117] [2024-06-27 17:56:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:57,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:57,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:57,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138010117] [2024-06-27 17:56:57,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138010117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:57,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:57,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:57,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569639743] [2024-06-27 17:56:57,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:57,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:57,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:57,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:57,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:57,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:57,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 1839 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:57,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:57,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:57,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:57,650 INFO L124 PetriNetUnfolderBase]: 2291/3869 cut-off events. [2024-06-27 17:56:57,650 INFO L125 PetriNetUnfolderBase]: For 59109/59109 co-relation queries the response was YES. [2024-06-27 17:56:57,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19115 conditions, 3869 events. 2291/3869 cut-off events. For 59109/59109 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25140 event pairs, 568 based on Foata normal form. 1/3853 useless extension candidates. Maximal degree in co-relation 19045. Up to 3193 conditions per place. [2024-06-27 17:56:57,671 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 134 selfloop transitions, 65 changer transitions 0/213 dead transitions. [2024-06-27 17:56:57,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 213 transitions, 2497 flow [2024-06-27 17:56:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:56:57,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 17:56:57,672 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1839 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:56:57,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 213 transitions, 2497 flow [2024-06-27 17:56:57,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 213 transitions, 2423 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:57,782 INFO L231 Difference]: Finished difference. Result has 162 places, 184 transitions, 1955 flow [2024-06-27 17:56:57,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1955, PETRI_PLACES=162, PETRI_TRANSITIONS=184} [2024-06-27 17:56:57,782 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-27 17:56:57,783 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 184 transitions, 1955 flow [2024-06-27 17:56:57,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:57,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:57,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:57,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:56:57,783 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:57,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:57,783 INFO L85 PathProgramCache]: Analyzing trace with hash 980595948, now seen corresponding path program 5 times [2024-06-27 17:56:57,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:57,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468387071] [2024-06-27 17:56:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:57,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:57,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:57,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468387071] [2024-06-27 17:56:57,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468387071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:57,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:57,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:57,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127822889] [2024-06-27 17:56:57,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:57,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:57,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:57,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:57,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:57,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:57,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 184 transitions, 1955 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:57,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:57,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:57,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:58,264 INFO L124 PetriNetUnfolderBase]: 2302/3898 cut-off events. [2024-06-27 17:56:58,264 INFO L125 PetriNetUnfolderBase]: For 61195/61195 co-relation queries the response was YES. [2024-06-27 17:56:58,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19355 conditions, 3898 events. 2302/3898 cut-off events. For 61195/61195 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25466 event pairs, 805 based on Foata normal form. 1/3867 useless extension candidates. Maximal degree in co-relation 19284. Up to 3387 conditions per place. [2024-06-27 17:56:58,291 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 172 selfloop transitions, 25 changer transitions 0/211 dead transitions. [2024-06-27 17:56:58,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 211 transitions, 2448 flow [2024-06-27 17:56:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-27 17:56:58,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126984126984127 [2024-06-27 17:56:58,292 INFO L175 Difference]: Start difference. First operand has 162 places, 184 transitions, 1955 flow. Second operand 7 states and 193 transitions. [2024-06-27 17:56:58,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 211 transitions, 2448 flow [2024-06-27 17:56:58,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 211 transitions, 2317 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:58,402 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 1931 flow [2024-06-27 17:56:58,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1931, PETRI_PLACES=166, PETRI_TRANSITIONS=187} [2024-06-27 17:56:58,403 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 117 predicate places. [2024-06-27 17:56:58,403 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 1931 flow [2024-06-27 17:56:58,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:58,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:58,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:58,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:56:58,403 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:58,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1760103918, now seen corresponding path program 6 times [2024-06-27 17:56:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:58,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039660571] [2024-06-27 17:56:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:58,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:58,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039660571] [2024-06-27 17:56:58,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039660571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:58,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:58,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:58,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899100857] [2024-06-27 17:56:58,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:58,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:58,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:58,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:58,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:58,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:58,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 187 transitions, 1931 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:58,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:58,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:58,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:58,882 INFO L124 PetriNetUnfolderBase]: 2313/3801 cut-off events. [2024-06-27 17:56:58,882 INFO L125 PetriNetUnfolderBase]: For 63118/63118 co-relation queries the response was YES. [2024-06-27 17:56:58,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19175 conditions, 3801 events. 2313/3801 cut-off events. For 63118/63118 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24278 event pairs, 481 based on Foata normal form. 1/3790 useless extension candidates. Maximal degree in co-relation 19102. Up to 3217 conditions per place. [2024-06-27 17:56:58,910 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 131 selfloop transitions, 70 changer transitions 0/215 dead transitions. [2024-06-27 17:56:58,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 215 transitions, 2509 flow [2024-06-27 17:56:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 17:56:58,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-27 17:56:58,918 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 1931 flow. Second operand 7 states and 199 transitions. [2024-06-27 17:56:58,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 215 transitions, 2509 flow [2024-06-27 17:56:59,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 215 transitions, 2391 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:59,044 INFO L231 Difference]: Finished difference. Result has 166 places, 190 transitions, 2005 flow [2024-06-27 17:56:59,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2005, PETRI_PLACES=166, PETRI_TRANSITIONS=190} [2024-06-27 17:56:59,045 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 117 predicate places. [2024-06-27 17:56:59,045 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 190 transitions, 2005 flow [2024-06-27 17:56:59,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:59,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:59,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:56:59,046 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:59,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash -662264174, now seen corresponding path program 7 times [2024-06-27 17:56:59,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:59,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437848285] [2024-06-27 17:56:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:59,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:59,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437848285] [2024-06-27 17:56:59,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437848285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:59,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:59,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:59,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598924161] [2024-06-27 17:56:59,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:59,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:59,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:59,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:59,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:59,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:59,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 190 transitions, 2005 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:59,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:59,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:59,526 INFO L124 PetriNetUnfolderBase]: 2338/3874 cut-off events. [2024-06-27 17:56:59,526 INFO L125 PetriNetUnfolderBase]: For 67322/67322 co-relation queries the response was YES. [2024-06-27 17:56:59,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19706 conditions, 3874 events. 2338/3874 cut-off events. For 67322/67322 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25012 event pairs, 509 based on Foata normal form. 1/3849 useless extension candidates. Maximal degree in co-relation 19633. Up to 3188 conditions per place. [2024-06-27 17:56:59,554 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 127 selfloop transitions, 81 changer transitions 0/222 dead transitions. [2024-06-27 17:56:59,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 222 transitions, 2727 flow [2024-06-27 17:56:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:56:59,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:56:59,555 INFO L175 Difference]: Start difference. First operand has 166 places, 190 transitions, 2005 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:56:59,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 222 transitions, 2727 flow [2024-06-27 17:56:59,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 222 transitions, 2598 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:59,690 INFO L231 Difference]: Finished difference. Result has 169 places, 196 transitions, 2199 flow [2024-06-27 17:56:59,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2199, PETRI_PLACES=169, PETRI_TRANSITIONS=196} [2024-06-27 17:56:59,691 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 120 predicate places. [2024-06-27 17:56:59,691 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 196 transitions, 2199 flow [2024-06-27 17:56:59,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:59,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:59,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:56:59,692 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:59,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:59,692 INFO L85 PathProgramCache]: Analyzing trace with hash 27578684, now seen corresponding path program 8 times [2024-06-27 17:56:59,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:59,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260482360] [2024-06-27 17:56:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:59,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:59,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:59,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260482360] [2024-06-27 17:56:59,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260482360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:59,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:59,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:56:59,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244030205] [2024-06-27 17:56:59,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:59,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:56:59,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:56:59,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:56:59,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:56:59,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 196 transitions, 2199 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:59,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:56:59,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:00,242 INFO L124 PetriNetUnfolderBase]: 2388/3957 cut-off events. [2024-06-27 17:57:00,242 INFO L125 PetriNetUnfolderBase]: For 76333/76333 co-relation queries the response was YES. [2024-06-27 17:57:00,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21081 conditions, 3957 events. 2388/3957 cut-off events. For 76333/76333 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25457 event pairs, 471 based on Foata normal form. 2/3949 useless extension candidates. Maximal degree in co-relation 21006. Up to 3242 conditions per place. [2024-06-27 17:57:00,272 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 132 selfloop transitions, 104 changer transitions 0/250 dead transitions. [2024-06-27 17:57:00,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 250 transitions, 3137 flow [2024-06-27 17:57:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:57:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:57:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2024-06-27 17:57:00,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:57:00,273 INFO L175 Difference]: Start difference. First operand has 169 places, 196 transitions, 2199 flow. Second operand 9 states and 261 transitions. [2024-06-27 17:57:00,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 250 transitions, 3137 flow [2024-06-27 17:57:00,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 250 transitions, 2923 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:00,394 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 2417 flow [2024-06-27 17:57:00,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2417, PETRI_PLACES=174, PETRI_TRANSITIONS=208} [2024-06-27 17:57:00,395 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 125 predicate places. [2024-06-27 17:57:00,395 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 2417 flow [2024-06-27 17:57:00,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:00,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:00,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:00,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:57:00,395 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:00,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:00,396 INFO L85 PathProgramCache]: Analyzing trace with hash -868917614, now seen corresponding path program 9 times [2024-06-27 17:57:00,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:00,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740594934] [2024-06-27 17:57:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:00,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:00,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:00,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740594934] [2024-06-27 17:57:00,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740594934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:00,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:00,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:00,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569084473] [2024-06-27 17:57:00,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:00,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:00,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:00,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:00,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:00,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 208 transitions, 2417 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:00,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:00,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:00,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:01,010 INFO L124 PetriNetUnfolderBase]: 2382/3922 cut-off events. [2024-06-27 17:57:01,010 INFO L125 PetriNetUnfolderBase]: For 75988/75988 co-relation queries the response was YES. [2024-06-27 17:57:01,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21018 conditions, 3922 events. 2382/3922 cut-off events. For 75988/75988 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25151 event pairs, 461 based on Foata normal form. 2/3919 useless extension candidates. Maximal degree in co-relation 20942. Up to 3236 conditions per place. [2024-06-27 17:57:01,036 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 136 selfloop transitions, 99 changer transitions 0/249 dead transitions. [2024-06-27 17:57:01,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 249 transitions, 3143 flow [2024-06-27 17:57:01,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-27 17:57:01,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:57:01,040 INFO L175 Difference]: Start difference. First operand has 174 places, 208 transitions, 2417 flow. Second operand 8 states and 240 transitions. [2024-06-27 17:57:01,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 249 transitions, 3143 flow [2024-06-27 17:57:01,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 249 transitions, 2909 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:01,164 INFO L231 Difference]: Finished difference. Result has 176 places, 208 transitions, 2403 flow [2024-06-27 17:57:01,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2403, PETRI_PLACES=176, PETRI_TRANSITIONS=208} [2024-06-27 17:57:01,165 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 127 predicate places. [2024-06-27 17:57:01,165 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 208 transitions, 2403 flow [2024-06-27 17:57:01,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:01,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:01,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:57:01,166 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:01,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash -469212914, now seen corresponding path program 10 times [2024-06-27 17:57:01,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:01,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577601774] [2024-06-27 17:57:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:01,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:01,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:01,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577601774] [2024-06-27 17:57:01,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577601774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:01,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:01,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:01,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612186996] [2024-06-27 17:57:01,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:01,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:01,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:01,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:01,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:01,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:01,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 208 transitions, 2403 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:01,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:01,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:01,711 INFO L124 PetriNetUnfolderBase]: 2379/3926 cut-off events. [2024-06-27 17:57:01,711 INFO L125 PetriNetUnfolderBase]: For 74097/74097 co-relation queries the response was YES. [2024-06-27 17:57:01,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20862 conditions, 3926 events. 2379/3926 cut-off events. For 74097/74097 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25156 event pairs, 467 based on Foata normal form. 1/3922 useless extension candidates. Maximal degree in co-relation 20786. Up to 3425 conditions per place. [2024-06-27 17:57:01,742 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 184 selfloop transitions, 43 changer transitions 0/241 dead transitions. [2024-06-27 17:57:01,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 241 transitions, 3032 flow [2024-06-27 17:57:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:57:01,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 17:57:01,745 INFO L175 Difference]: Start difference. First operand has 176 places, 208 transitions, 2403 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:57:01,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 241 transitions, 3032 flow [2024-06-27 17:57:01,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 241 transitions, 2787 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 17:57:01,897 INFO L231 Difference]: Finished difference. Result has 175 places, 210 transitions, 2309 flow [2024-06-27 17:57:01,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2309, PETRI_PLACES=175, PETRI_TRANSITIONS=210} [2024-06-27 17:57:01,898 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 126 predicate places. [2024-06-27 17:57:01,898 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 210 transitions, 2309 flow [2024-06-27 17:57:01,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:01,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:01,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:57:01,898 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:01,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:01,898 INFO L85 PathProgramCache]: Analyzing trace with hash -462546674, now seen corresponding path program 11 times [2024-06-27 17:57:01,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:01,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308364302] [2024-06-27 17:57:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:01,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:01,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:01,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308364302] [2024-06-27 17:57:01,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308364302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:01,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:01,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:01,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018721455] [2024-06-27 17:57:01,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:01,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:01,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:01,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:01,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:02,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:02,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 210 transitions, 2309 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:02,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:02,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:02,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:02,447 INFO L124 PetriNetUnfolderBase]: 2376/3973 cut-off events. [2024-06-27 17:57:02,447 INFO L125 PetriNetUnfolderBase]: For 72728/72728 co-relation queries the response was YES. [2024-06-27 17:57:02,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20681 conditions, 3973 events. 2376/3973 cut-off events. For 72728/72728 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25742 event pairs, 521 based on Foata normal form. 1/3967 useless extension candidates. Maximal degree in co-relation 20604. Up to 3422 conditions per place. [2024-06-27 17:57:02,476 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 189 selfloop transitions, 43 changer transitions 0/246 dead transitions. [2024-06-27 17:57:02,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 246 transitions, 2859 flow [2024-06-27 17:57:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:57:02,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 17:57:02,477 INFO L175 Difference]: Start difference. First operand has 175 places, 210 transitions, 2309 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:57:02,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 246 transitions, 2859 flow [2024-06-27 17:57:02,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 246 transitions, 2779 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:02,616 INFO L231 Difference]: Finished difference. Result has 179 places, 210 transitions, 2329 flow [2024-06-27 17:57:02,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2329, PETRI_PLACES=179, PETRI_TRANSITIONS=210} [2024-06-27 17:57:02,616 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 130 predicate places. [2024-06-27 17:57:02,617 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 210 transitions, 2329 flow [2024-06-27 17:57:02,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:02,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:02,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:02,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:57:02,617 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:02,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash -469204978, now seen corresponding path program 2 times [2024-06-27 17:57:02,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:02,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390965497] [2024-06-27 17:57:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:02,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:02,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:02,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390965497] [2024-06-27 17:57:02,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390965497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:02,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:02,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:02,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199732497] [2024-06-27 17:57:02,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:02,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:02,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:02,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:02,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:02,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:57:02,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 210 transitions, 2329 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:02,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:02,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:57:02,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:03,205 INFO L124 PetriNetUnfolderBase]: 2333/3876 cut-off events. [2024-06-27 17:57:03,205 INFO L125 PetriNetUnfolderBase]: For 83216/83216 co-relation queries the response was YES. [2024-06-27 17:57:03,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20595 conditions, 3876 events. 2333/3876 cut-off events. For 83216/83216 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25064 event pairs, 340 based on Foata normal form. 9/3843 useless extension candidates. Maximal degree in co-relation 20517. Up to 3130 conditions per place. [2024-06-27 17:57:03,233 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 166 selfloop transitions, 31 changer transitions 0/239 dead transitions. [2024-06-27 17:57:03,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 239 transitions, 2827 flow [2024-06-27 17:57:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-27 17:57:03,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-27 17:57:03,234 INFO L175 Difference]: Start difference. First operand has 179 places, 210 transitions, 2329 flow. Second operand 5 states and 159 transitions. [2024-06-27 17:57:03,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 239 transitions, 2827 flow [2024-06-27 17:57:03,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 239 transitions, 2719 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:03,345 INFO L231 Difference]: Finished difference. Result has 177 places, 211 transitions, 2312 flow [2024-06-27 17:57:03,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2221, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2312, PETRI_PLACES=177, PETRI_TRANSITIONS=211} [2024-06-27 17:57:03,346 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 128 predicate places. [2024-06-27 17:57:03,346 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 211 transitions, 2312 flow [2024-06-27 17:57:03,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:03,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:03,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:03,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:57:03,346 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:03,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:03,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2144899098, now seen corresponding path program 3 times [2024-06-27 17:57:03,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:03,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881814212] [2024-06-27 17:57:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:03,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:03,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:03,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881814212] [2024-06-27 17:57:03,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881814212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:03,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:03,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:03,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290203075] [2024-06-27 17:57:03,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:03,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:03,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:03,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:57:03,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 211 transitions, 2312 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:03,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:03,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:57:03,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:03,931 INFO L124 PetriNetUnfolderBase]: 2397/3984 cut-off events. [2024-06-27 17:57:03,931 INFO L125 PetriNetUnfolderBase]: For 84684/84684 co-relation queries the response was YES. [2024-06-27 17:57:03,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21221 conditions, 3984 events. 2397/3984 cut-off events. For 84684/84684 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 25924 event pairs, 462 based on Foata normal form. 10/3947 useless extension candidates. Maximal degree in co-relation 21143. Up to 3179 conditions per place. [2024-06-27 17:57:03,961 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 160 selfloop transitions, 38 changer transitions 0/240 dead transitions. [2024-06-27 17:57:03,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 240 transitions, 2812 flow [2024-06-27 17:57:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:57:03,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 17:57:03,962 INFO L175 Difference]: Start difference. First operand has 177 places, 211 transitions, 2312 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:57:03,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 240 transitions, 2812 flow [2024-06-27 17:57:04,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 240 transitions, 2757 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:04,093 INFO L231 Difference]: Finished difference. Result has 180 places, 212 transitions, 2361 flow [2024-06-27 17:57:04,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2361, PETRI_PLACES=180, PETRI_TRANSITIONS=212} [2024-06-27 17:57:04,093 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 131 predicate places. [2024-06-27 17:57:04,093 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 212 transitions, 2361 flow [2024-06-27 17:57:04,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:04,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:04,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:57:04,094 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:04,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash -454920178, now seen corresponding path program 4 times [2024-06-27 17:57:04,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:04,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632355697] [2024-06-27 17:57:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:04,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:04,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632355697] [2024-06-27 17:57:04,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632355697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:04,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:04,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:04,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440844440] [2024-06-27 17:57:04,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:04,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:04,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:04,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:04,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:57:04,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 212 transitions, 2361 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:04,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:04,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:57:04,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:04,704 INFO L124 PetriNetUnfolderBase]: 2403/4101 cut-off events. [2024-06-27 17:57:04,704 INFO L125 PetriNetUnfolderBase]: For 84036/84040 co-relation queries the response was YES. [2024-06-27 17:57:04,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21382 conditions, 4101 events. 2403/4101 cut-off events. For 84036/84040 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27229 event pairs, 453 based on Foata normal form. 10/4068 useless extension candidates. Maximal degree in co-relation 21303. Up to 3193 conditions per place. [2024-06-27 17:57:04,730 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 171 selfloop transitions, 34 changer transitions 0/247 dead transitions. [2024-06-27 17:57:04,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 247 transitions, 2903 flow [2024-06-27 17:57:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 17:57:04,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 17:57:04,731 INFO L175 Difference]: Start difference. First operand has 180 places, 212 transitions, 2361 flow. Second operand 6 states and 186 transitions. [2024-06-27 17:57:04,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 247 transitions, 2903 flow [2024-06-27 17:57:04,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 247 transitions, 2823 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:04,870 INFO L231 Difference]: Finished difference. Result has 182 places, 213 transitions, 2373 flow [2024-06-27 17:57:04,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2373, PETRI_PLACES=182, PETRI_TRANSITIONS=213} [2024-06-27 17:57:04,870 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 133 predicate places. [2024-06-27 17:57:04,870 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 213 transitions, 2373 flow [2024-06-27 17:57:04,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:04,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:04,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:04,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:57:04,871 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:04,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash -454913234, now seen corresponding path program 1 times [2024-06-27 17:57:04,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:04,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472977459] [2024-06-27 17:57:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:04,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:04,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:04,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472977459] [2024-06-27 17:57:04,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472977459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:04,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:04,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:04,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203189102] [2024-06-27 17:57:04,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:04,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:04,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:04,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:04,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:04,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 213 transitions, 2373 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:04,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:04,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:04,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:05,508 INFO L124 PetriNetUnfolderBase]: 2545/4262 cut-off events. [2024-06-27 17:57:05,508 INFO L125 PetriNetUnfolderBase]: For 76780/76780 co-relation queries the response was YES. [2024-06-27 17:57:05,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21916 conditions, 4262 events. 2545/4262 cut-off events. For 76780/76780 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28093 event pairs, 470 based on Foata normal form. 6/4261 useless extension candidates. Maximal degree in co-relation 21836. Up to 3576 conditions per place. [2024-06-27 17:57:05,546 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 209 selfloop transitions, 22 changer transitions 0/245 dead transitions. [2024-06-27 17:57:05,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 245 transitions, 2963 flow [2024-06-27 17:57:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:57:05,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 17:57:05,547 INFO L175 Difference]: Start difference. First operand has 182 places, 213 transitions, 2373 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:57:05,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 245 transitions, 2963 flow [2024-06-27 17:57:05,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 245 transitions, 2887 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:05,704 INFO L231 Difference]: Finished difference. Result has 184 places, 213 transitions, 2345 flow [2024-06-27 17:57:05,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2345, PETRI_PLACES=184, PETRI_TRANSITIONS=213} [2024-06-27 17:57:05,705 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-27 17:57:05,705 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 213 transitions, 2345 flow [2024-06-27 17:57:05,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:05,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:05,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:05,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:57:05,705 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:05,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -598575398, now seen corresponding path program 1 times [2024-06-27 17:57:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:05,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687237431] [2024-06-27 17:57:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:05,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:05,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:05,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687237431] [2024-06-27 17:57:05,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687237431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:05,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:05,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:05,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519458836] [2024-06-27 17:57:05,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:05,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:05,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:05,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 45 [2024-06-27 17:57:05,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 213 transitions, 2345 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:05,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:05,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 45 [2024-06-27 17:57:05,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:06,269 INFO L124 PetriNetUnfolderBase]: 1717/3392 cut-off events. [2024-06-27 17:57:06,270 INFO L125 PetriNetUnfolderBase]: For 49839/52861 co-relation queries the response was YES. [2024-06-27 17:57:06,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14518 conditions, 3392 events. 1717/3392 cut-off events. For 49839/52861 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 27574 event pairs, 479 based on Foata normal form. 113/3100 useless extension candidates. Maximal degree in co-relation 14437. Up to 1007 conditions per place. [2024-06-27 17:57:06,292 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 23 selfloop transitions, 24 changer transitions 49/272 dead transitions. [2024-06-27 17:57:06,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 272 transitions, 2993 flow [2024-06-27 17:57:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:06,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 17:57:06,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-06-27 17:57:06,293 INFO L175 Difference]: Start difference. First operand has 184 places, 213 transitions, 2345 flow. Second operand 7 states and 213 transitions. [2024-06-27 17:57:06,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 272 transitions, 2993 flow [2024-06-27 17:57:06,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 272 transitions, 2921 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:06,443 INFO L231 Difference]: Finished difference. Result has 190 places, 215 transitions, 2369 flow [2024-06-27 17:57:06,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2369, PETRI_PLACES=190, PETRI_TRANSITIONS=215} [2024-06-27 17:57:06,444 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 141 predicate places. [2024-06-27 17:57:06,444 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 215 transitions, 2369 flow [2024-06-27 17:57:06,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:06,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:06,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:06,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:57:06,444 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:06,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:06,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2109326689, now seen corresponding path program 1 times [2024-06-27 17:57:06,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:06,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234628618] [2024-06-27 17:57:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:06,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:06,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234628618] [2024-06-27 17:57:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234628618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:06,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:06,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:06,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783988106] [2024-06-27 17:57:06,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:06,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:06,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:06,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:06,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 215 transitions, 2369 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:06,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:06,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:06,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:07,026 INFO L124 PetriNetUnfolderBase]: 2489/4330 cut-off events. [2024-06-27 17:57:07,026 INFO L125 PetriNetUnfolderBase]: For 75230/75253 co-relation queries the response was YES. [2024-06-27 17:57:07,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22286 conditions, 4330 events. 2489/4330 cut-off events. For 75230/75253 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29432 event pairs, 909 based on Foata normal form. 24/4307 useless extension candidates. Maximal degree in co-relation 22201. Up to 3650 conditions per place. [2024-06-27 17:57:07,062 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 204 selfloop transitions, 34 changer transitions 5/258 dead transitions. [2024-06-27 17:57:07,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 258 transitions, 3029 flow [2024-06-27 17:57:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:57:07,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 17:57:07,064 INFO L175 Difference]: Start difference. First operand has 190 places, 215 transitions, 2369 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:57:07,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 258 transitions, 3029 flow [2024-06-27 17:57:07,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 258 transitions, 2991 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:07,241 INFO L231 Difference]: Finished difference. Result has 192 places, 217 transitions, 2459 flow [2024-06-27 17:57:07,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2459, PETRI_PLACES=192, PETRI_TRANSITIONS=217} [2024-06-27 17:57:07,242 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2024-06-27 17:57:07,242 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 217 transitions, 2459 flow [2024-06-27 17:57:07,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:07,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:07,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:07,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:57:07,242 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:07,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:07,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1312800381, now seen corresponding path program 2 times [2024-06-27 17:57:07,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:07,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385103692] [2024-06-27 17:57:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:07,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:07,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:07,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385103692] [2024-06-27 17:57:07,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385103692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:07,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:07,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:07,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076339795] [2024-06-27 17:57:07,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:07,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:07,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:07,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:07,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:07,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:07,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 217 transitions, 2459 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:07,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:07,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:07,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:07,832 INFO L124 PetriNetUnfolderBase]: 2423/4131 cut-off events. [2024-06-27 17:57:07,833 INFO L125 PetriNetUnfolderBase]: For 77222/77284 co-relation queries the response was YES. [2024-06-27 17:57:07,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21808 conditions, 4131 events. 2423/4131 cut-off events. For 77222/77284 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27237 event pairs, 545 based on Foata normal form. 63/4170 useless extension candidates. Maximal degree in co-relation 21723. Up to 3384 conditions per place. [2024-06-27 17:57:07,860 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 178 selfloop transitions, 68 changer transitions 0/261 dead transitions. [2024-06-27 17:57:07,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 261 transitions, 3365 flow [2024-06-27 17:57:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:07,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:57:07,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-27 17:57:07,861 INFO L175 Difference]: Start difference. First operand has 192 places, 217 transitions, 2459 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:57:07,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 261 transitions, 3365 flow [2024-06-27 17:57:08,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 261 transitions, 3261 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:08,032 INFO L231 Difference]: Finished difference. Result has 192 places, 226 transitions, 2653 flow [2024-06-27 17:57:08,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2653, PETRI_PLACES=192, PETRI_TRANSITIONS=226} [2024-06-27 17:57:08,032 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2024-06-27 17:57:08,033 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 226 transitions, 2653 flow [2024-06-27 17:57:08,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:08,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:08,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:08,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:57:08,033 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:08,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:08,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2061741885, now seen corresponding path program 3 times [2024-06-27 17:57:08,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:08,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623128106] [2024-06-27 17:57:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:08,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:08,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:08,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623128106] [2024-06-27 17:57:08,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623128106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:08,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:08,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:08,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118107988] [2024-06-27 17:57:08,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:08,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:08,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 226 transitions, 2653 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:08,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:08,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:08,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:08,598 INFO L124 PetriNetUnfolderBase]: 2434/4215 cut-off events. [2024-06-27 17:57:08,598 INFO L125 PetriNetUnfolderBase]: For 83633/83687 co-relation queries the response was YES. [2024-06-27 17:57:08,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22497 conditions, 4215 events. 2434/4215 cut-off events. For 83633/83687 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28184 event pairs, 614 based on Foata normal form. 55/4245 useless extension candidates. Maximal degree in co-relation 22412. Up to 3396 conditions per place. [2024-06-27 17:57:08,631 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 176 selfloop transitions, 70 changer transitions 0/261 dead transitions. [2024-06-27 17:57:08,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 261 transitions, 3461 flow [2024-06-27 17:57:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:57:08,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 17:57:08,632 INFO L175 Difference]: Start difference. First operand has 192 places, 226 transitions, 2653 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:57:08,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 261 transitions, 3461 flow [2024-06-27 17:57:08,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 261 transitions, 3327 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:08,792 INFO L231 Difference]: Finished difference. Result has 197 places, 229 transitions, 2721 flow [2024-06-27 17:57:08,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2721, PETRI_PLACES=197, PETRI_TRANSITIONS=229} [2024-06-27 17:57:08,793 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 148 predicate places. [2024-06-27 17:57:08,793 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 229 transitions, 2721 flow [2024-06-27 17:57:08,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:08,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:08,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:08,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:57:08,793 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:08,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1165367447, now seen corresponding path program 4 times [2024-06-27 17:57:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:08,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945890497] [2024-06-27 17:57:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:08,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:08,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945890497] [2024-06-27 17:57:08,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945890497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:08,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:08,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:08,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298131165] [2024-06-27 17:57:08,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:08,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:08,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:08,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:08,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:08,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:08,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 229 transitions, 2721 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:08,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:08,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:08,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:09,420 INFO L124 PetriNetUnfolderBase]: 2445/4184 cut-off events. [2024-06-27 17:57:09,420 INFO L125 PetriNetUnfolderBase]: For 85524/85573 co-relation queries the response was YES. [2024-06-27 17:57:09,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22717 conditions, 4184 events. 2445/4184 cut-off events. For 85524/85573 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27728 event pairs, 710 based on Foata normal form. 50/4201 useless extension candidates. Maximal degree in co-relation 22630. Up to 3573 conditions per place. [2024-06-27 17:57:09,457 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 214 selfloop transitions, 30 changer transitions 0/259 dead transitions. [2024-06-27 17:57:09,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 259 transitions, 3321 flow [2024-06-27 17:57:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 17:57:09,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253968253968254 [2024-06-27 17:57:09,458 INFO L175 Difference]: Start difference. First operand has 197 places, 229 transitions, 2721 flow. Second operand 7 states and 197 transitions. [2024-06-27 17:57:09,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 259 transitions, 3321 flow [2024-06-27 17:57:09,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 259 transitions, 3187 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:09,673 INFO L231 Difference]: Finished difference. Result has 200 places, 232 transitions, 2699 flow [2024-06-27 17:57:09,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2699, PETRI_PLACES=200, PETRI_TRANSITIONS=232} [2024-06-27 17:57:09,673 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 151 predicate places. [2024-06-27 17:57:09,673 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 232 transitions, 2699 flow [2024-06-27 17:57:09,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:09,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:09,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:09,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:57:09,674 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:09,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:09,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1948663995, now seen corresponding path program 1 times [2024-06-27 17:57:09,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:09,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524118673] [2024-06-27 17:57:09,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:09,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:09,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:09,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524118673] [2024-06-27 17:57:09,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524118673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:09,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:09,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:09,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734887087] [2024-06-27 17:57:09,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:09,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:09,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:09,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:09,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:09,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 232 transitions, 2699 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:09,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:09,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:09,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:10,380 INFO L124 PetriNetUnfolderBase]: 2486/4255 cut-off events. [2024-06-27 17:57:10,381 INFO L125 PetriNetUnfolderBase]: For 91300/91362 co-relation queries the response was YES. [2024-06-27 17:57:10,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23009 conditions, 4255 events. 2486/4255 cut-off events. For 91300/91362 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28308 event pairs, 606 based on Foata normal form. 64/4289 useless extension candidates. Maximal degree in co-relation 22921. Up to 3538 conditions per place. [2024-06-27 17:57:10,421 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 209 selfloop transitions, 48 changer transitions 0/272 dead transitions. [2024-06-27 17:57:10,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 272 transitions, 3455 flow [2024-06-27 17:57:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:57:10,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 17:57:10,422 INFO L175 Difference]: Start difference. First operand has 200 places, 232 transitions, 2699 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:57:10,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 272 transitions, 3455 flow [2024-06-27 17:57:10,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 272 transitions, 3389 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:10,701 INFO L231 Difference]: Finished difference. Result has 203 places, 236 transitions, 2794 flow [2024-06-27 17:57:10,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2794, PETRI_PLACES=203, PETRI_TRANSITIONS=236} [2024-06-27 17:57:10,702 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 154 predicate places. [2024-06-27 17:57:10,702 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 236 transitions, 2794 flow [2024-06-27 17:57:10,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:10,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:10,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:10,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:57:10,702 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:10,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1951520955, now seen corresponding path program 2 times [2024-06-27 17:57:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:10,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228422087] [2024-06-27 17:57:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:10,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228422087] [2024-06-27 17:57:10,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228422087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:10,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:10,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:10,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640696807] [2024-06-27 17:57:10,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:10,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:10,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:10,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:10,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:10,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:10,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 236 transitions, 2794 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:10,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:10,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:10,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:11,288 INFO L124 PetriNetUnfolderBase]: 2504/4204 cut-off events. [2024-06-27 17:57:11,289 INFO L125 PetriNetUnfolderBase]: For 94787/94849 co-relation queries the response was YES. [2024-06-27 17:57:11,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23412 conditions, 4204 events. 2504/4204 cut-off events. For 94787/94849 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27560 event pairs, 552 based on Foata normal form. 64/4240 useless extension candidates. Maximal degree in co-relation 23323. Up to 3613 conditions per place. [2024-06-27 17:57:11,324 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 209 selfloop transitions, 45 changer transitions 0/269 dead transitions. [2024-06-27 17:57:11,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 269 transitions, 3416 flow [2024-06-27 17:57:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:57:11,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 17:57:11,325 INFO L175 Difference]: Start difference. First operand has 203 places, 236 transitions, 2794 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:57:11,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 269 transitions, 3416 flow [2024-06-27 17:57:11,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 269 transitions, 3318 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:11,598 INFO L231 Difference]: Finished difference. Result has 207 places, 238 transitions, 2827 flow [2024-06-27 17:57:11,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2827, PETRI_PLACES=207, PETRI_TRANSITIONS=238} [2024-06-27 17:57:11,598 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 158 predicate places. [2024-06-27 17:57:11,598 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 238 transitions, 2827 flow [2024-06-27 17:57:11,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:11,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:11,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:11,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:57:11,598 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:11,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2066812125, now seen corresponding path program 3 times [2024-06-27 17:57:11,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:11,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99259820] [2024-06-27 17:57:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:11,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:11,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:11,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99259820] [2024-06-27 17:57:11,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99259820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:11,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:11,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:11,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570733492] [2024-06-27 17:57:11,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:11,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:11,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:11,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:11,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:11,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 238 transitions, 2827 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:11,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:11,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:11,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:12,240 INFO L124 PetriNetUnfolderBase]: 2586/4377 cut-off events. [2024-06-27 17:57:12,241 INFO L125 PetriNetUnfolderBase]: For 98684/98744 co-relation queries the response was YES. [2024-06-27 17:57:12,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24136 conditions, 4377 events. 2586/4377 cut-off events. For 98684/98744 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28916 event pairs, 585 based on Foata normal form. 62/4409 useless extension candidates. Maximal degree in co-relation 24045. Up to 3701 conditions per place. [2024-06-27 17:57:12,277 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 227 selfloop transitions, 30 changer transitions 0/272 dead transitions. [2024-06-27 17:57:12,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 272 transitions, 3492 flow [2024-06-27 17:57:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:57:12,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 17:57:12,278 INFO L175 Difference]: Start difference. First operand has 207 places, 238 transitions, 2827 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:57:12,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 272 transitions, 3492 flow [2024-06-27 17:57:12,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 272 transitions, 3393 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:12,501 INFO L231 Difference]: Finished difference. Result has 209 places, 241 transitions, 2835 flow [2024-06-27 17:57:12,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2835, PETRI_PLACES=209, PETRI_TRANSITIONS=241} [2024-06-27 17:57:12,501 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 160 predicate places. [2024-06-27 17:57:12,501 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 241 transitions, 2835 flow [2024-06-27 17:57:12,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:12,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:12,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:12,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:57:12,502 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:12,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:12,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1130399683, now seen corresponding path program 5 times [2024-06-27 17:57:12,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:12,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91716920] [2024-06-27 17:57:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:12,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:12,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:12,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91716920] [2024-06-27 17:57:12,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91716920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:12,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:12,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:12,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685956957] [2024-06-27 17:57:12,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:12,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:12,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:12,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 241 transitions, 2835 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:12,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:12,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:12,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:13,121 INFO L124 PetriNetUnfolderBase]: 2597/4488 cut-off events. [2024-06-27 17:57:13,121 INFO L125 PetriNetUnfolderBase]: For 102572/102626 co-relation queries the response was YES. [2024-06-27 17:57:13,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24433 conditions, 4488 events. 2597/4488 cut-off events. For 102572/102626 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30399 event pairs, 655 based on Foata normal form. 55/4504 useless extension candidates. Maximal degree in co-relation 24341. Up to 3627 conditions per place. [2024-06-27 17:57:13,161 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 184 selfloop transitions, 77 changer transitions 0/276 dead transitions. [2024-06-27 17:57:13,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 276 transitions, 3687 flow [2024-06-27 17:57:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:57:13,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 17:57:13,162 INFO L175 Difference]: Start difference. First operand has 209 places, 241 transitions, 2835 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:57:13,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 276 transitions, 3687 flow [2024-06-27 17:57:13,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 276 transitions, 3621 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:13,369 INFO L231 Difference]: Finished difference. Result has 211 places, 244 transitions, 2979 flow [2024-06-27 17:57:13,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2769, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2979, PETRI_PLACES=211, PETRI_TRANSITIONS=244} [2024-06-27 17:57:13,370 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 162 predicate places. [2024-06-27 17:57:13,370 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 244 transitions, 2979 flow [2024-06-27 17:57:13,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:13,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:13,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:13,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:57:13,370 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:13,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:13,371 INFO L85 PathProgramCache]: Analyzing trace with hash -618957413, now seen corresponding path program 6 times [2024-06-27 17:57:13,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:13,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401595402] [2024-06-27 17:57:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:13,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:13,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:13,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401595402] [2024-06-27 17:57:13,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401595402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:13,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:13,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:13,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986021110] [2024-06-27 17:57:13,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:13,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:13,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:13,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:13,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 244 transitions, 2979 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:13,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:13,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:13,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:14,046 INFO L124 PetriNetUnfolderBase]: 2608/4388 cut-off events. [2024-06-27 17:57:14,046 INFO L125 PetriNetUnfolderBase]: For 104944/105004 co-relation queries the response was YES. [2024-06-27 17:57:14,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24647 conditions, 4388 events. 2608/4388 cut-off events. For 104944/105004 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29115 event pairs, 559 based on Foata normal form. 61/4419 useless extension candidates. Maximal degree in co-relation 24554. Up to 3639 conditions per place. [2024-06-27 17:57:14,078 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 183 selfloop transitions, 78 changer transitions 0/276 dead transitions. [2024-06-27 17:57:14,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 276 transitions, 3833 flow [2024-06-27 17:57:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 17:57:14,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:57:14,079 INFO L175 Difference]: Start difference. First operand has 211 places, 244 transitions, 2979 flow. Second operand 7 states and 203 transitions. [2024-06-27 17:57:14,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 276 transitions, 3833 flow [2024-06-27 17:57:14,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 276 transitions, 3584 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:14,296 INFO L231 Difference]: Finished difference. Result has 213 places, 247 transitions, 2948 flow [2024-06-27 17:57:14,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2948, PETRI_PLACES=213, PETRI_TRANSITIONS=247} [2024-06-27 17:57:14,297 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 164 predicate places. [2024-06-27 17:57:14,297 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 247 transitions, 2948 flow [2024-06-27 17:57:14,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:14,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:14,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:14,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:57:14,297 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:14,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1773262235, now seen corresponding path program 7 times [2024-06-27 17:57:14,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:14,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117918602] [2024-06-27 17:57:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:14,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:14,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:14,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117918602] [2024-06-27 17:57:14,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117918602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:14,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:14,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:14,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425200580] [2024-06-27 17:57:14,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:14,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:14,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:14,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:14,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 247 transitions, 2948 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:14,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:14,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:14,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:14,884 INFO L124 PetriNetUnfolderBase]: 2619/4508 cut-off events. [2024-06-27 17:57:14,884 INFO L125 PetriNetUnfolderBase]: For 107795/107849 co-relation queries the response was YES. [2024-06-27 17:57:14,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24766 conditions, 4508 events. 2619/4508 cut-off events. For 107795/107849 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 30423 event pairs, 654 based on Foata normal form. 55/4523 useless extension candidates. Maximal degree in co-relation 24672. Up to 3651 conditions per place. [2024-06-27 17:57:14,925 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 177 selfloop transitions, 83 changer transitions 0/275 dead transitions. [2024-06-27 17:57:14,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 275 transitions, 3676 flow [2024-06-27 17:57:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:57:14,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 17:57:14,926 INFO L175 Difference]: Start difference. First operand has 213 places, 247 transitions, 2948 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:57:14,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 275 transitions, 3676 flow [2024-06-27 17:57:15,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 275 transitions, 3514 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:15,261 INFO L231 Difference]: Finished difference. Result has 216 places, 250 transitions, 2998 flow [2024-06-27 17:57:15,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2998, PETRI_PLACES=216, PETRI_TRANSITIONS=250} [2024-06-27 17:57:15,262 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 167 predicate places. [2024-06-27 17:57:15,262 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 250 transitions, 2998 flow [2024-06-27 17:57:15,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:15,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:15,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:15,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:57:15,262 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:15,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:15,263 INFO L85 PathProgramCache]: Analyzing trace with hash 944636861, now seen corresponding path program 8 times [2024-06-27 17:57:15,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:15,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637510640] [2024-06-27 17:57:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:15,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:15,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:15,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637510640] [2024-06-27 17:57:15,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637510640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:15,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:15,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:15,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710639483] [2024-06-27 17:57:15,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:15,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:15,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:15,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:15,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:15,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 250 transitions, 2998 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:15,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:15,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:15,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:15,886 INFO L124 PetriNetUnfolderBase]: 2616/4508 cut-off events. [2024-06-27 17:57:15,886 INFO L125 PetriNetUnfolderBase]: For 108698/108758 co-relation queries the response was YES. [2024-06-27 17:57:15,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24727 conditions, 4508 events. 2616/4508 cut-off events. For 108698/108758 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30393 event pairs, 655 based on Foata normal form. 61/4533 useless extension candidates. Maximal degree in co-relation 24632. Up to 3712 conditions per place. [2024-06-27 17:57:15,927 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 204 selfloop transitions, 59 changer transitions 0/278 dead transitions. [2024-06-27 17:57:15,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 278 transitions, 3702 flow [2024-06-27 17:57:15,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:57:15,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:57:15,928 INFO L175 Difference]: Start difference. First operand has 216 places, 250 transitions, 2998 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:57:15,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 278 transitions, 3702 flow [2024-06-27 17:57:16,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 278 transitions, 3546 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:16,234 INFO L231 Difference]: Finished difference. Result has 218 places, 250 transitions, 2970 flow [2024-06-27 17:57:16,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2842, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2970, PETRI_PLACES=218, PETRI_TRANSITIONS=250} [2024-06-27 17:57:16,235 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 169 predicate places. [2024-06-27 17:57:16,235 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 250 transitions, 2970 flow [2024-06-27 17:57:16,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:16,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:16,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:16,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:57:16,235 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:16,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2074047929, now seen corresponding path program 9 times [2024-06-27 17:57:16,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:16,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895679270] [2024-06-27 17:57:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:16,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:16,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:16,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895679270] [2024-06-27 17:57:16,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895679270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:16,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:16,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:16,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190855282] [2024-06-27 17:57:16,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:16,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:16,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:16,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:16,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:16,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:16,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 250 transitions, 2970 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:16,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:16,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:16,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:16,838 INFO L124 PetriNetUnfolderBase]: 2613/4421 cut-off events. [2024-06-27 17:57:16,838 INFO L125 PetriNetUnfolderBase]: For 109148/109212 co-relation queries the response was YES. [2024-06-27 17:57:16,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24512 conditions, 4421 events. 2613/4421 cut-off events. For 109148/109212 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 29253 event pairs, 569 based on Foata normal form. 65/4459 useless extension candidates. Maximal degree in co-relation 24416. Up to 3709 conditions per place. [2024-06-27 17:57:16,876 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 215 selfloop transitions, 62 changer transitions 0/292 dead transitions. [2024-06-27 17:57:16,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 292 transitions, 3636 flow [2024-06-27 17:57:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:57:16,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 17:57:16,877 INFO L175 Difference]: Start difference. First operand has 218 places, 250 transitions, 2970 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:57:16,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 292 transitions, 3636 flow [2024-06-27 17:57:17,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 292 transitions, 3422 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 17:57:17,092 INFO L231 Difference]: Finished difference. Result has 218 places, 250 transitions, 2894 flow [2024-06-27 17:57:17,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2894, PETRI_PLACES=218, PETRI_TRANSITIONS=250} [2024-06-27 17:57:17,093 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 169 predicate places. [2024-06-27 17:57:17,093 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 250 transitions, 2894 flow [2024-06-27 17:57:17,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:17,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:17,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:17,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:57:17,093 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:17,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:17,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1123726499, now seen corresponding path program 4 times [2024-06-27 17:57:17,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:17,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714777902] [2024-06-27 17:57:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:17,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:17,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714777902] [2024-06-27 17:57:17,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714777902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:17,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:17,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:17,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637839292] [2024-06-27 17:57:17,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:17,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:17,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:17,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:17,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 250 transitions, 2894 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:17,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:17,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:17,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:17,689 INFO L124 PetriNetUnfolderBase]: 2654/4455 cut-off events. [2024-06-27 17:57:17,689 INFO L125 PetriNetUnfolderBase]: For 113758/113820 co-relation queries the response was YES. [2024-06-27 17:57:17,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24916 conditions, 4455 events. 2654/4455 cut-off events. For 113758/113820 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 29537 event pairs, 569 based on Foata normal form. 64/4489 useless extension candidates. Maximal degree in co-relation 24820. Up to 3782 conditions per place. [2024-06-27 17:57:17,727 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 224 selfloop transitions, 48 changer transitions 0/287 dead transitions. [2024-06-27 17:57:17,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 287 transitions, 3694 flow [2024-06-27 17:57:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:17,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:57:17,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 17:57:17,728 INFO L175 Difference]: Start difference. First operand has 218 places, 250 transitions, 2894 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:57:17,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 287 transitions, 3694 flow [2024-06-27 17:57:17,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 287 transitions, 3524 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 17:57:17,992 INFO L231 Difference]: Finished difference. Result has 216 places, 254 transitions, 2897 flow [2024-06-27 17:57:17,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2897, PETRI_PLACES=216, PETRI_TRANSITIONS=254} [2024-06-27 17:57:17,992 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 167 predicate places. [2024-06-27 17:57:17,992 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 254 transitions, 2897 flow [2024-06-27 17:57:17,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:17,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:17,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:17,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:57:17,993 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:17,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1120869539, now seen corresponding path program 5 times [2024-06-27 17:57:17,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:17,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748839153] [2024-06-27 17:57:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:17,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:18,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:18,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748839153] [2024-06-27 17:57:18,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748839153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:18,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:18,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:18,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469144494] [2024-06-27 17:57:18,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:18,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:18,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:18,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:18,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:18,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:18,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 254 transitions, 2897 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:18,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:18,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:18,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:18,634 INFO L124 PetriNetUnfolderBase]: 2672/4608 cut-off events. [2024-06-27 17:57:18,634 INFO L125 PetriNetUnfolderBase]: For 112542/112600 co-relation queries the response was YES. [2024-06-27 17:57:18,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25264 conditions, 4608 events. 2672/4608 cut-off events. For 112542/112600 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31254 event pairs, 651 based on Foata normal form. 60/4633 useless extension candidates. Maximal degree in co-relation 25168. Up to 3857 conditions per place. [2024-06-27 17:57:18,670 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 224 selfloop transitions, 45 changer transitions 0/284 dead transitions. [2024-06-27 17:57:18,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 284 transitions, 3545 flow [2024-06-27 17:57:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 17:57:18,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253968253968254 [2024-06-27 17:57:18,671 INFO L175 Difference]: Start difference. First operand has 216 places, 254 transitions, 2897 flow. Second operand 7 states and 197 transitions. [2024-06-27 17:57:18,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 284 transitions, 3545 flow [2024-06-27 17:57:18,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 284 transitions, 3435 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:18,947 INFO L231 Difference]: Finished difference. Result has 220 places, 256 transitions, 2922 flow [2024-06-27 17:57:18,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2922, PETRI_PLACES=220, PETRI_TRANSITIONS=256} [2024-06-27 17:57:18,948 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 171 predicate places. [2024-06-27 17:57:18,948 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 256 transitions, 2922 flow [2024-06-27 17:57:18,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:18,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:18,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:18,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:57:18,948 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:18,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash -975126341, now seen corresponding path program 6 times [2024-06-27 17:57:18,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:18,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100348260] [2024-06-27 17:57:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:18,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:19,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100348260] [2024-06-27 17:57:19,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100348260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:19,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:19,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:19,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242711538] [2024-06-27 17:57:19,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:19,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:19,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:19,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:19,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:19,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:19,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 256 transitions, 2922 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:19,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:19,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:19,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:19,589 INFO L124 PetriNetUnfolderBase]: 2690/4519 cut-off events. [2024-06-27 17:57:19,590 INFO L125 PetriNetUnfolderBase]: For 113915/113977 co-relation queries the response was YES. [2024-06-27 17:57:19,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25328 conditions, 4519 events. 2690/4519 cut-off events. For 113915/113977 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29992 event pairs, 459 based on Foata normal form. 64/4558 useless extension candidates. Maximal degree in co-relation 25230. Up to 3594 conditions per place. [2024-06-27 17:57:19,631 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 218 selfloop transitions, 66 changer transitions 0/299 dead transitions. [2024-06-27 17:57:19,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 299 transitions, 3912 flow [2024-06-27 17:57:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:57:19,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-27 17:57:19,632 INFO L175 Difference]: Start difference. First operand has 220 places, 256 transitions, 2922 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:57:19,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 299 transitions, 3912 flow [2024-06-27 17:57:19,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 299 transitions, 3813 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:19,965 INFO L231 Difference]: Finished difference. Result has 223 places, 264 transitions, 3122 flow [2024-06-27 17:57:19,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3122, PETRI_PLACES=223, PETRI_TRANSITIONS=264} [2024-06-27 17:57:19,965 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 174 predicate places. [2024-06-27 17:57:19,966 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 264 transitions, 3122 flow [2024-06-27 17:57:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:19,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:19,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:19,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:57:19,966 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:19,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash -963698501, now seen corresponding path program 7 times [2024-06-27 17:57:19,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:19,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73297296] [2024-06-27 17:57:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:19,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:20,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:20,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73297296] [2024-06-27 17:57:20,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73297296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:20,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:20,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:20,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733364342] [2024-06-27 17:57:20,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:20,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:20,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:20,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:20,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:20,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:20,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 264 transitions, 3122 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:20,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:20,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:20,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:20,605 INFO L124 PetriNetUnfolderBase]: 2708/4663 cut-off events. [2024-06-27 17:57:20,605 INFO L125 PetriNetUnfolderBase]: For 119931/119993 co-relation queries the response was YES. [2024-06-27 17:57:20,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26303 conditions, 4663 events. 2708/4663 cut-off events. For 119931/119993 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31598 event pairs, 533 based on Foata normal form. 64/4702 useless extension candidates. Maximal degree in co-relation 26203. Up to 3610 conditions per place. [2024-06-27 17:57:20,648 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 214 selfloop transitions, 69 changer transitions 0/298 dead transitions. [2024-06-27 17:57:20,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 298 transitions, 3937 flow [2024-06-27 17:57:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:57:20,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 17:57:20,649 INFO L175 Difference]: Start difference. First operand has 223 places, 264 transitions, 3122 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:57:20,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 298 transitions, 3937 flow [2024-06-27 17:57:20,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 298 transitions, 3793 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:20,970 INFO L231 Difference]: Finished difference. Result has 228 places, 267 transitions, 3182 flow [2024-06-27 17:57:20,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3182, PETRI_PLACES=228, PETRI_TRANSITIONS=267} [2024-06-27 17:57:20,970 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 179 predicate places. [2024-06-27 17:57:20,970 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 267 transitions, 3182 flow [2024-06-27 17:57:20,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:20,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:20,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:20,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:57:20,971 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:20,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:20,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1773269179, now seen corresponding path program 8 times [2024-06-27 17:57:20,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:20,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526468983] [2024-06-27 17:57:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:20,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:21,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:21,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526468983] [2024-06-27 17:57:21,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526468983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:21,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:21,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:21,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466973835] [2024-06-27 17:57:21,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:21,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:21,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:21,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:21,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 267 transitions, 3182 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:21,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:21,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:21,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:21,652 INFO L124 PetriNetUnfolderBase]: 2726/4695 cut-off events. [2024-06-27 17:57:21,652 INFO L125 PetriNetUnfolderBase]: For 120792/120854 co-relation queries the response was YES. [2024-06-27 17:57:21,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26316 conditions, 4695 events. 2726/4695 cut-off events. For 120792/120854 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 32018 event pairs, 662 based on Foata normal form. 64/4726 useless extension candidates. Maximal degree in co-relation 26214. Up to 3935 conditions per place. [2024-06-27 17:57:21,696 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 234 selfloop transitions, 45 changer transitions 0/294 dead transitions. [2024-06-27 17:57:21,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 294 transitions, 3840 flow [2024-06-27 17:57:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 17:57:21,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158730158730159 [2024-06-27 17:57:21,697 INFO L175 Difference]: Start difference. First operand has 228 places, 267 transitions, 3182 flow. Second operand 7 states and 194 transitions. [2024-06-27 17:57:21,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 294 transitions, 3840 flow [2024-06-27 17:57:22,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 294 transitions, 3726 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:22,019 INFO L231 Difference]: Finished difference. Result has 232 places, 269 transitions, 3201 flow [2024-06-27 17:57:22,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3201, PETRI_PLACES=232, PETRI_TRANSITIONS=269} [2024-06-27 17:57:22,019 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 183 predicate places. [2024-06-27 17:57:22,019 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 269 transitions, 3201 flow [2024-06-27 17:57:22,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:22,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:22,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:22,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:57:22,020 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:22,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:22,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1781840059, now seen corresponding path program 9 times [2024-06-27 17:57:22,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:22,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423039330] [2024-06-27 17:57:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:22,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:22,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:22,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423039330] [2024-06-27 17:57:22,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423039330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:22,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:22,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:22,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102507177] [2024-06-27 17:57:22,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:22,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:22,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:22,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:22,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 269 transitions, 3201 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:22,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:22,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:22,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:22,661 INFO L124 PetriNetUnfolderBase]: 2744/4628 cut-off events. [2024-06-27 17:57:22,661 INFO L125 PetriNetUnfolderBase]: For 123328/123390 co-relation queries the response was YES. [2024-06-27 17:57:22,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26185 conditions, 4628 events. 2744/4628 cut-off events. For 123328/123390 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31161 event pairs, 587 based on Foata normal form. 64/4658 useless extension candidates. Maximal degree in co-relation 26082. Up to 3901 conditions per place. [2024-06-27 17:57:22,703 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 231 selfloop transitions, 52 changer transitions 0/298 dead transitions. [2024-06-27 17:57:22,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 298 transitions, 3873 flow [2024-06-27 17:57:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 17:57:22,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 17:57:22,704 INFO L175 Difference]: Start difference. First operand has 232 places, 269 transitions, 3201 flow. Second operand 7 states and 195 transitions. [2024-06-27 17:57:22,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 298 transitions, 3873 flow [2024-06-27 17:57:23,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 298 transitions, 3770 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:23,033 INFO L231 Difference]: Finished difference. Result has 235 places, 272 transitions, 3263 flow [2024-06-27 17:57:23,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3263, PETRI_PLACES=235, PETRI_TRANSITIONS=272} [2024-06-27 17:57:23,034 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 186 predicate places. [2024-06-27 17:57:23,034 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 272 transitions, 3263 flow [2024-06-27 17:57:23,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:23,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:23,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:23,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:57:23,034 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:23,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:23,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1166645539, now seen corresponding path program 10 times [2024-06-27 17:57:23,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:23,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752717463] [2024-06-27 17:57:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:23,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:23,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:23,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752717463] [2024-06-27 17:57:23,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752717463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:23,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:23,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:23,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852432810] [2024-06-27 17:57:23,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:23,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:23,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:23,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:23,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 272 transitions, 3263 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:23,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:23,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:23,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:23,843 INFO L124 PetriNetUnfolderBase]: 2739/4569 cut-off events. [2024-06-27 17:57:23,843 INFO L125 PetriNetUnfolderBase]: For 122928/122992 co-relation queries the response was YES. [2024-06-27 17:57:23,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26135 conditions, 4569 events. 2739/4569 cut-off events. For 122928/122992 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30464 event pairs, 555 based on Foata normal form. 66/4603 useless extension candidates. Maximal degree in co-relation 26030. Up to 3628 conditions per place. [2024-06-27 17:57:23,893 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 245 selfloop transitions, 58 changer transitions 0/318 dead transitions. [2024-06-27 17:57:23,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 318 transitions, 4027 flow [2024-06-27 17:57:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 17:57:23,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638888888888889 [2024-06-27 17:57:23,894 INFO L175 Difference]: Start difference. First operand has 235 places, 272 transitions, 3263 flow. Second operand 8 states and 239 transitions. [2024-06-27 17:57:23,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 318 transitions, 4027 flow [2024-06-27 17:57:24,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 318 transitions, 3902 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:24,243 INFO L231 Difference]: Finished difference. Result has 239 places, 272 transitions, 3274 flow [2024-06-27 17:57:24,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3274, PETRI_PLACES=239, PETRI_TRANSITIONS=272} [2024-06-27 17:57:24,243 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 190 predicate places. [2024-06-27 17:57:24,244 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 272 transitions, 3274 flow [2024-06-27 17:57:24,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:24,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:24,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:24,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:57:24,244 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:24,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:24,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1763082407, now seen corresponding path program 11 times [2024-06-27 17:57:24,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:24,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952202127] [2024-06-27 17:57:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:24,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:24,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952202127] [2024-06-27 17:57:24,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952202127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:24,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:24,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:24,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540048370] [2024-06-27 17:57:24,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:24,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:24,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:24,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 272 transitions, 3274 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:24,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:24,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:24,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:24,945 INFO L124 PetriNetUnfolderBase]: 2734/4668 cut-off events. [2024-06-27 17:57:24,945 INFO L125 PetriNetUnfolderBase]: For 125131/125185 co-relation queries the response was YES. [2024-06-27 17:57:24,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26266 conditions, 4668 events. 2734/4668 cut-off events. For 125131/125185 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31700 event pairs, 668 based on Foata normal form. 56/4676 useless extension candidates. Maximal degree in co-relation 26160. Up to 3891 conditions per place. [2024-06-27 17:57:24,987 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 234 selfloop transitions, 51 changer transitions 0/300 dead transitions. [2024-06-27 17:57:24,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 300 transitions, 3918 flow [2024-06-27 17:57:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:24,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:57:24,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 17:57:24,988 INFO L175 Difference]: Start difference. First operand has 239 places, 272 transitions, 3274 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:57:24,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 300 transitions, 3918 flow [2024-06-27 17:57:25,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 300 transitions, 3794 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:25,475 INFO L231 Difference]: Finished difference. Result has 239 places, 272 transitions, 3260 flow [2024-06-27 17:57:25,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3260, PETRI_PLACES=239, PETRI_TRANSITIONS=272} [2024-06-27 17:57:25,476 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 190 predicate places. [2024-06-27 17:57:25,476 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 272 transitions, 3260 flow [2024-06-27 17:57:25,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:25,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:25,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:25,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:57:25,476 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:25,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:25,477 INFO L85 PathProgramCache]: Analyzing trace with hash 953214685, now seen corresponding path program 12 times [2024-06-27 17:57:25,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:25,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700771794] [2024-06-27 17:57:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:25,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:25,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:25,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700771794] [2024-06-27 17:57:25,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700771794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:25,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:25,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:25,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801068142] [2024-06-27 17:57:25,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:25,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:25,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:25,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:25,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 272 transitions, 3260 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:25,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:25,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:25,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:26,177 INFO L124 PetriNetUnfolderBase]: 2729/4669 cut-off events. [2024-06-27 17:57:26,177 INFO L125 PetriNetUnfolderBase]: For 121104/121158 co-relation queries the response was YES. [2024-06-27 17:57:26,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25989 conditions, 4669 events. 2729/4669 cut-off events. For 121104/121158 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31660 event pairs, 526 based on Foata normal form. 56/4681 useless extension candidates. Maximal degree in co-relation 25882. Up to 3496 conditions per place. [2024-06-27 17:57:26,219 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 223 selfloop transitions, 66 changer transitions 0/304 dead transitions. [2024-06-27 17:57:26,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 304 transitions, 3958 flow [2024-06-27 17:57:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:57:26,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 17:57:26,220 INFO L175 Difference]: Start difference. First operand has 239 places, 272 transitions, 3260 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:57:26,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 304 transitions, 3958 flow [2024-06-27 17:57:26,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 304 transitions, 3832 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:26,618 INFO L231 Difference]: Finished difference. Result has 240 places, 272 transitions, 3274 flow [2024-06-27 17:57:26,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3274, PETRI_PLACES=240, PETRI_TRANSITIONS=272} [2024-06-27 17:57:26,618 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 191 predicate places. [2024-06-27 17:57:26,618 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 272 transitions, 3274 flow [2024-06-27 17:57:26,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:26,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:26,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:26,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:57:26,619 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:26,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:26,619 INFO L85 PathProgramCache]: Analyzing trace with hash 334419087, now seen corresponding path program 1 times [2024-06-27 17:57:26,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:26,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109197697] [2024-06-27 17:57:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:26,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:26,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109197697] [2024-06-27 17:57:26,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109197697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:26,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:26,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:26,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449636761] [2024-06-27 17:57:26,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:26,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:26,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:26,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:26,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 272 transitions, 3274 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:26,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:26,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:26,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:27,299 INFO L124 PetriNetUnfolderBase]: 2740/4621 cut-off events. [2024-06-27 17:57:27,299 INFO L125 PetriNetUnfolderBase]: For 121623/121687 co-relation queries the response was YES. [2024-06-27 17:57:27,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26243 conditions, 4621 events. 2740/4621 cut-off events. For 121623/121687 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30874 event pairs, 583 based on Foata normal form. 65/4653 useless extension candidates. Maximal degree in co-relation 26135. Up to 3890 conditions per place. [2024-06-27 17:57:27,341 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 235 selfloop transitions, 65 changer transitions 0/315 dead transitions. [2024-06-27 17:57:27,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 315 transitions, 4154 flow [2024-06-27 17:57:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 17:57:27,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 17:57:27,342 INFO L175 Difference]: Start difference. First operand has 240 places, 272 transitions, 3274 flow. Second operand 8 states and 234 transitions. [2024-06-27 17:57:27,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 315 transitions, 4154 flow [2024-06-27 17:57:27,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 315 transitions, 4028 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:27,650 INFO L231 Difference]: Finished difference. Result has 243 places, 275 transitions, 3346 flow [2024-06-27 17:57:27,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3346, PETRI_PLACES=243, PETRI_TRANSITIONS=275} [2024-06-27 17:57:27,650 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 194 predicate places. [2024-06-27 17:57:27,651 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 275 transitions, 3346 flow [2024-06-27 17:57:27,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:27,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:27,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:27,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 17:57:27,651 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:27,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:27,651 INFO L85 PathProgramCache]: Analyzing trace with hash 72174645, now seen corresponding path program 2 times [2024-06-27 17:57:27,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:27,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650169772] [2024-06-27 17:57:27,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:27,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:27,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:27,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650169772] [2024-06-27 17:57:27,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650169772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:27,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:27,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:27,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293038677] [2024-06-27 17:57:27,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:27,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:27,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:27,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:27,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 275 transitions, 3346 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:27,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:27,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:27,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:28,354 INFO L124 PetriNetUnfolderBase]: 2765/4775 cut-off events. [2024-06-27 17:57:28,354 INFO L125 PetriNetUnfolderBase]: For 131745/131799 co-relation queries the response was YES. [2024-06-27 17:57:28,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27082 conditions, 4775 events. 2765/4775 cut-off events. For 131745/131799 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 32640 event pairs, 638 based on Foata normal form. 55/4791 useless extension candidates. Maximal degree in co-relation 26974. Up to 3580 conditions per place. [2024-06-27 17:57:28,397 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 170 selfloop transitions, 138 changer transitions 0/323 dead transitions. [2024-06-27 17:57:28,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 323 transitions, 4610 flow [2024-06-27 17:57:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:57:28,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 17:57:28,398 INFO L175 Difference]: Start difference. First operand has 243 places, 275 transitions, 3346 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:57:28,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 323 transitions, 4610 flow [2024-06-27 17:57:28,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 323 transitions, 4354 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:28,818 INFO L231 Difference]: Finished difference. Result has 245 places, 284 transitions, 3564 flow [2024-06-27 17:57:28,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3564, PETRI_PLACES=245, PETRI_TRANSITIONS=284} [2024-06-27 17:57:28,819 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 196 predicate places. [2024-06-27 17:57:28,819 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 284 transitions, 3564 flow [2024-06-27 17:57:28,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:28,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:28,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:28,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 17:57:28,819 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:28,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:28,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2122524293, now seen corresponding path program 3 times [2024-06-27 17:57:28,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:28,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775967854] [2024-06-27 17:57:28,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:28,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:28,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:28,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775967854] [2024-06-27 17:57:28,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775967854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:28,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:28,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:28,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501966906] [2024-06-27 17:57:28,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:28,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:28,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:28,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:28,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:28,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 284 transitions, 3564 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:28,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:28,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:28,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:29,512 INFO L124 PetriNetUnfolderBase]: 2790/4679 cut-off events. [2024-06-27 17:57:29,512 INFO L125 PetriNetUnfolderBase]: For 139555/139617 co-relation queries the response was YES. [2024-06-27 17:57:29,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27845 conditions, 4679 events. 2790/4679 cut-off events. For 139555/139617 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31391 event pairs, 562 based on Foata normal form. 63/4707 useless extension candidates. Maximal degree in co-relation 27738. Up to 3607 conditions per place. [2024-06-27 17:57:29,558 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 173 selfloop transitions, 138 changer transitions 0/326 dead transitions. [2024-06-27 17:57:29,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 326 transitions, 4782 flow [2024-06-27 17:57:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:29,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 17:57:29,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-27 17:57:29,559 INFO L175 Difference]: Start difference. First operand has 245 places, 284 transitions, 3564 flow. Second operand 8 states and 235 transitions. [2024-06-27 17:57:29,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 326 transitions, 4782 flow [2024-06-27 17:57:30,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 326 transitions, 4468 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:30,100 INFO L231 Difference]: Finished difference. Result has 249 places, 290 transitions, 3668 flow [2024-06-27 17:57:30,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3668, PETRI_PLACES=249, PETRI_TRANSITIONS=290} [2024-06-27 17:57:30,100 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 200 predicate places. [2024-06-27 17:57:30,101 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 290 transitions, 3668 flow [2024-06-27 17:57:30,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:30,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:30,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:30,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 17:57:30,101 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:30,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash 553060559, now seen corresponding path program 4 times [2024-06-27 17:57:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:30,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284959644] [2024-06-27 17:57:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:30,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:30,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:30,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284959644] [2024-06-27 17:57:30,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284959644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:30,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:30,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:30,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294942514] [2024-06-27 17:57:30,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:30,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:30,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:30,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:30,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 290 transitions, 3668 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:30,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:30,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:30,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:30,766 INFO L124 PetriNetUnfolderBase]: 2787/4795 cut-off events. [2024-06-27 17:57:30,767 INFO L125 PetriNetUnfolderBase]: For 134126/134180 co-relation queries the response was YES. [2024-06-27 17:57:30,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27071 conditions, 4795 events. 2787/4795 cut-off events. For 134126/134180 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32699 event pairs, 629 based on Foata normal form. 55/4812 useless extension candidates. Maximal degree in co-relation 26963. Up to 3604 conditions per place. [2024-06-27 17:57:30,810 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 170 selfloop transitions, 140 changer transitions 0/325 dead transitions. [2024-06-27 17:57:30,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 325 transitions, 4628 flow [2024-06-27 17:57:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 17:57:30,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-27 17:57:30,811 INFO L175 Difference]: Start difference. First operand has 249 places, 290 transitions, 3668 flow. Second operand 8 states and 233 transitions. [2024-06-27 17:57:30,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 325 transitions, 4628 flow [2024-06-27 17:57:31,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 325 transitions, 4370 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:31,251 INFO L231 Difference]: Finished difference. Result has 253 places, 290 transitions, 3696 flow [2024-06-27 17:57:31,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3410, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3696, PETRI_PLACES=253, PETRI_TRANSITIONS=290} [2024-06-27 17:57:31,252 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 204 predicate places. [2024-06-27 17:57:31,252 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 290 transitions, 3696 flow [2024-06-27 17:57:31,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:31,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:31,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:31,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 17:57:31,252 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:31,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:31,252 INFO L85 PathProgramCache]: Analyzing trace with hash 685956657, now seen corresponding path program 5 times [2024-06-27 17:57:31,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:31,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077069427] [2024-06-27 17:57:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:31,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:31,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:31,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077069427] [2024-06-27 17:57:31,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077069427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:31,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:31,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:31,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734723957] [2024-06-27 17:57:31,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:31,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:31,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:31,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:31,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:31,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:31,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 290 transitions, 3696 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:31,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:31,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:31,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:32,009 INFO L124 PetriNetUnfolderBase]: 2812/4917 cut-off events. [2024-06-27 17:57:32,009 INFO L125 PetriNetUnfolderBase]: For 141740/141761 co-relation queries the response was YES. [2024-06-27 17:57:32,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27609 conditions, 4917 events. 2812/4917 cut-off events. For 141740/141761 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34359 event pairs, 911 based on Foata normal form. 22/4882 useless extension candidates. Maximal degree in co-relation 27500. Up to 3994 conditions per place. [2024-06-27 17:57:32,054 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 258 selfloop transitions, 61 changer transitions 0/334 dead transitions. [2024-06-27 17:57:32,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 334 transitions, 4667 flow [2024-06-27 17:57:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 275 transitions. [2024-06-27 17:57:32,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:57:32,055 INFO L175 Difference]: Start difference. First operand has 253 places, 290 transitions, 3696 flow. Second operand 10 states and 275 transitions. [2024-06-27 17:57:32,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 334 transitions, 4667 flow [2024-06-27 17:57:32,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 334 transitions, 4367 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:32,593 INFO L231 Difference]: Finished difference. Result has 256 places, 296 transitions, 3628 flow [2024-06-27 17:57:32,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3628, PETRI_PLACES=256, PETRI_TRANSITIONS=296} [2024-06-27 17:57:32,594 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 207 predicate places. [2024-06-27 17:57:32,594 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 296 transitions, 3628 flow [2024-06-27 17:57:32,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:32,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:32,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:32,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 17:57:32,594 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:32,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 486654867, now seen corresponding path program 6 times [2024-06-27 17:57:32,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:32,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211379388] [2024-06-27 17:57:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:32,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:32,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:32,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211379388] [2024-06-27 17:57:32,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211379388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:32,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:32,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:32,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898609846] [2024-06-27 17:57:32,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:32,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:32,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:32,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:32,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:32,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:32,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 296 transitions, 3628 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:32,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:32,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:32,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:33,358 INFO L124 PetriNetUnfolderBase]: 2823/4915 cut-off events. [2024-06-27 17:57:33,359 INFO L125 PetriNetUnfolderBase]: For 143112/143134 co-relation queries the response was YES. [2024-06-27 17:57:33,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27395 conditions, 4915 events. 2823/4915 cut-off events. For 143112/143134 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34192 event pairs, 905 based on Foata normal form. 23/4882 useless extension candidates. Maximal degree in co-relation 27285. Up to 4006 conditions per place. [2024-06-27 17:57:33,404 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 254 selfloop transitions, 62 changer transitions 0/331 dead transitions. [2024-06-27 17:57:33,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 331 transitions, 4530 flow [2024-06-27 17:57:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:57:33,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 17:57:33,405 INFO L175 Difference]: Start difference. First operand has 256 places, 296 transitions, 3628 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:57:33,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 331 transitions, 4530 flow [2024-06-27 17:57:33,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 331 transitions, 4425 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:33,863 INFO L231 Difference]: Finished difference. Result has 258 places, 299 transitions, 3702 flow [2024-06-27 17:57:33,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3702, PETRI_PLACES=258, PETRI_TRANSITIONS=299} [2024-06-27 17:57:33,864 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 209 predicate places. [2024-06-27 17:57:33,864 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 299 transitions, 3702 flow [2024-06-27 17:57:33,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:33,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:33,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:33,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 17:57:33,864 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:33,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:33,864 INFO L85 PathProgramCache]: Analyzing trace with hash -926804983, now seen corresponding path program 7 times [2024-06-27 17:57:33,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:33,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395916480] [2024-06-27 17:57:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:33,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:33,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:33,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395916480] [2024-06-27 17:57:33,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395916480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:33,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:33,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:33,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617798760] [2024-06-27 17:57:33,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:33,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:33,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:33,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:33,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 299 transitions, 3702 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:33,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:33,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:33,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:34,607 INFO L124 PetriNetUnfolderBase]: 2820/4935 cut-off events. [2024-06-27 17:57:34,607 INFO L125 PetriNetUnfolderBase]: For 144960/144981 co-relation queries the response was YES. [2024-06-27 17:57:34,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27525 conditions, 4935 events. 2820/4935 cut-off events. For 144960/144981 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34553 event pairs, 914 based on Foata normal form. 22/4899 useless extension candidates. Maximal degree in co-relation 27413. Up to 4003 conditions per place. [2024-06-27 17:57:34,655 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 253 selfloop transitions, 62 changer transitions 0/330 dead transitions. [2024-06-27 17:57:34,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 330 transitions, 4423 flow [2024-06-27 17:57:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:57:34,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-27 17:57:34,656 INFO L175 Difference]: Start difference. First operand has 258 places, 299 transitions, 3702 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:57:34,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 330 transitions, 4423 flow [2024-06-27 17:57:35,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 330 transitions, 4261 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:35,153 INFO L231 Difference]: Finished difference. Result has 260 places, 299 transitions, 3670 flow [2024-06-27 17:57:35,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3670, PETRI_PLACES=260, PETRI_TRANSITIONS=299} [2024-06-27 17:57:35,154 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 211 predicate places. [2024-06-27 17:57:35,154 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 299 transitions, 3670 flow [2024-06-27 17:57:35,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:35,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:35,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:35,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 17:57:35,154 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:35,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:35,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1548491863, now seen corresponding path program 1 times [2024-06-27 17:57:35,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:35,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748612265] [2024-06-27 17:57:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:35,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748612265] [2024-06-27 17:57:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748612265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:35,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:35,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:35,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060427851] [2024-06-27 17:57:35,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:35,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:35,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:35,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:35,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 299 transitions, 3670 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:35,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:35,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:35,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:35,909 INFO L124 PetriNetUnfolderBase]: 3004/5084 cut-off events. [2024-06-27 17:57:35,909 INFO L125 PetriNetUnfolderBase]: For 159031/159082 co-relation queries the response was YES. [2024-06-27 17:57:35,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28662 conditions, 5084 events. 3004/5084 cut-off events. For 159031/159082 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 34836 event pairs, 657 based on Foata normal form. 57/5099 useless extension candidates. Maximal degree in co-relation 28549. Up to 3948 conditions per place. [2024-06-27 17:57:35,963 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 290 selfloop transitions, 46 changer transitions 0/351 dead transitions. [2024-06-27 17:57:35,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 351 transitions, 4690 flow [2024-06-27 17:57:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:57:35,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 17:57:35,964 INFO L175 Difference]: Start difference. First operand has 260 places, 299 transitions, 3670 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:57:35,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 351 transitions, 4690 flow [2024-06-27 17:57:36,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 351 transitions, 4558 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:36,619 INFO L231 Difference]: Finished difference. Result has 262 places, 303 transitions, 3709 flow [2024-06-27 17:57:36,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3709, PETRI_PLACES=262, PETRI_TRANSITIONS=303} [2024-06-27 17:57:36,619 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 213 predicate places. [2024-06-27 17:57:36,619 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 303 transitions, 3709 flow [2024-06-27 17:57:36,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:36,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:36,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 17:57:36,620 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:36,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1312316503, now seen corresponding path program 2 times [2024-06-27 17:57:36,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:36,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093311094] [2024-06-27 17:57:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:36,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:36,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093311094] [2024-06-27 17:57:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093311094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:36,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647514149] [2024-06-27 17:57:36,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:36,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:36,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:36,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:36,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:36,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:36,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 303 transitions, 3709 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:36,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:36,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:36,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:37,464 INFO L124 PetriNetUnfolderBase]: 3154/5495 cut-off events. [2024-06-27 17:57:37,464 INFO L125 PetriNetUnfolderBase]: For 168880/168901 co-relation queries the response was YES. [2024-06-27 17:57:37,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30737 conditions, 5495 events. 3154/5495 cut-off events. For 168880/168901 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 39221 event pairs, 1025 based on Foata normal form. 27/5455 useless extension candidates. Maximal degree in co-relation 30622. Up to 4425 conditions per place. [2024-06-27 17:57:37,520 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 294 selfloop transitions, 47 changer transitions 0/356 dead transitions. [2024-06-27 17:57:37,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 356 transitions, 4707 flow [2024-06-27 17:57:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 17:57:37,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-27 17:57:37,521 INFO L175 Difference]: Start difference. First operand has 262 places, 303 transitions, 3709 flow. Second operand 8 states and 233 transitions. [2024-06-27 17:57:37,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 356 transitions, 4707 flow [2024-06-27 17:57:38,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 356 transitions, 4589 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:38,148 INFO L231 Difference]: Finished difference. Result has 266 places, 312 transitions, 3857 flow [2024-06-27 17:57:38,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3857, PETRI_PLACES=266, PETRI_TRANSITIONS=312} [2024-06-27 17:57:38,148 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 217 predicate places. [2024-06-27 17:57:38,148 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 312 transitions, 3857 flow [2024-06-27 17:57:38,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:38,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:38,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:38,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 17:57:38,149 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:38,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1074506839, now seen corresponding path program 3 times [2024-06-27 17:57:38,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:38,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58126553] [2024-06-27 17:57:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:38,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:38,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:38,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58126553] [2024-06-27 17:57:38,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58126553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:38,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:38,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:38,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166751798] [2024-06-27 17:57:38,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:38,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:38,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:38,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:38,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 312 transitions, 3857 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:38,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:38,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:38,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:39,050 INFO L124 PetriNetUnfolderBase]: 3218/5559 cut-off events. [2024-06-27 17:57:39,050 INFO L125 PetriNetUnfolderBase]: For 173091/173113 co-relation queries the response was YES. [2024-06-27 17:57:39,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31053 conditions, 5559 events. 3218/5559 cut-off events. For 173091/173113 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39599 event pairs, 1045 based on Foata normal form. 28/5518 useless extension candidates. Maximal degree in co-relation 30937. Up to 4521 conditions per place. [2024-06-27 17:57:39,100 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 294 selfloop transitions, 45 changer transitions 0/354 dead transitions. [2024-06-27 17:57:39,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 354 transitions, 4739 flow [2024-06-27 17:57:39,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:57:39,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:57:39,101 INFO L175 Difference]: Start difference. First operand has 266 places, 312 transitions, 3857 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:57:39,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 354 transitions, 4739 flow [2024-06-27 17:57:39,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 354 transitions, 4639 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:39,745 INFO L231 Difference]: Finished difference. Result has 272 places, 316 transitions, 3935 flow [2024-06-27 17:57:39,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3759, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3935, PETRI_PLACES=272, PETRI_TRANSITIONS=316} [2024-06-27 17:57:39,746 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 223 predicate places. [2024-06-27 17:57:39,746 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 316 transitions, 3935 flow [2024-06-27 17:57:39,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:39,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:39,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:39,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 17:57:39,746 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:39,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:39,747 INFO L85 PathProgramCache]: Analyzing trace with hash 464353873, now seen corresponding path program 1 times [2024-06-27 17:57:39,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:39,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991254394] [2024-06-27 17:57:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:39,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:39,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:39,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991254394] [2024-06-27 17:57:39,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991254394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:39,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:39,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:39,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661738326] [2024-06-27 17:57:39,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:39,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:39,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:39,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:39,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:39,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:39,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 316 transitions, 3935 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:39,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:39,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:39,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:40,666 INFO L124 PetriNetUnfolderBase]: 3346/5718 cut-off events. [2024-06-27 17:57:40,666 INFO L125 PetriNetUnfolderBase]: For 197083/197141 co-relation queries the response was YES. [2024-06-27 17:57:40,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32619 conditions, 5718 events. 3346/5718 cut-off events. For 197083/197141 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40300 event pairs, 774 based on Foata normal form. 64/5739 useless extension candidates. Maximal degree in co-relation 32500. Up to 4457 conditions per place. [2024-06-27 17:57:40,727 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 258 selfloop transitions, 90 changer transitions 0/363 dead transitions. [2024-06-27 17:57:40,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 363 transitions, 4961 flow [2024-06-27 17:57:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:40,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:57:40,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:57:40,728 INFO L175 Difference]: Start difference. First operand has 272 places, 316 transitions, 3935 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:57:40,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 363 transitions, 4961 flow [2024-06-27 17:57:41,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 363 transitions, 4868 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:41,592 INFO L231 Difference]: Finished difference. Result has 277 places, 318 transitions, 4060 flow [2024-06-27 17:57:41,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3842, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4060, PETRI_PLACES=277, PETRI_TRANSITIONS=318} [2024-06-27 17:57:41,593 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 228 predicate places. [2024-06-27 17:57:41,593 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 318 transitions, 4060 flow [2024-06-27 17:57:41,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:41,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:41,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:41,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 17:57:41,593 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:41,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:41,594 INFO L85 PathProgramCache]: Analyzing trace with hash 367609109, now seen corresponding path program 2 times [2024-06-27 17:57:41,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:41,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016397595] [2024-06-27 17:57:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:41,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:41,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:41,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016397595] [2024-06-27 17:57:41,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016397595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:41,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:41,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:41,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255697876] [2024-06-27 17:57:41,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:41,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:41,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:41,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:41,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:41,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:41,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 318 transitions, 4060 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:41,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:41,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:41,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:42,537 INFO L124 PetriNetUnfolderBase]: 3474/5940 cut-off events. [2024-06-27 17:57:42,537 INFO L125 PetriNetUnfolderBase]: For 223957/224015 co-relation queries the response was YES. [2024-06-27 17:57:42,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34511 conditions, 5940 events. 3474/5940 cut-off events. For 223957/224015 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 42207 event pairs, 821 based on Foata normal form. 64/5959 useless extension candidates. Maximal degree in co-relation 34391. Up to 4779 conditions per place. [2024-06-27 17:57:42,594 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 260 selfloop transitions, 86 changer transitions 0/361 dead transitions. [2024-06-27 17:57:42,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 361 transitions, 5078 flow [2024-06-27 17:57:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 17:57:42,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-27 17:57:42,595 INFO L175 Difference]: Start difference. First operand has 277 places, 318 transitions, 4060 flow. Second operand 8 states and 233 transitions. [2024-06-27 17:57:42,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 361 transitions, 5078 flow [2024-06-27 17:57:43,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 361 transitions, 4968 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:43,456 INFO L231 Difference]: Finished difference. Result has 281 places, 320 transitions, 4164 flow [2024-06-27 17:57:43,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4164, PETRI_PLACES=281, PETRI_TRANSITIONS=320} [2024-06-27 17:57:43,457 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 232 predicate places. [2024-06-27 17:57:43,457 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 320 transitions, 4164 flow [2024-06-27 17:57:43,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:43,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:43,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:43,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 17:57:43,457 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:43,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:43,458 INFO L85 PathProgramCache]: Analyzing trace with hash 367756979, now seen corresponding path program 3 times [2024-06-27 17:57:43,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:43,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818188644] [2024-06-27 17:57:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:43,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:43,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:43,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818188644] [2024-06-27 17:57:43,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818188644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:43,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:43,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:43,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057666660] [2024-06-27 17:57:43,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:43,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:43,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:43,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:43,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 320 transitions, 4164 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:43,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:43,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:43,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:44,384 INFO L124 PetriNetUnfolderBase]: 3456/5926 cut-off events. [2024-06-27 17:57:44,384 INFO L125 PetriNetUnfolderBase]: For 214277/214335 co-relation queries the response was YES. [2024-06-27 17:57:44,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34142 conditions, 5926 events. 3456/5926 cut-off events. For 214277/214335 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 42152 event pairs, 830 based on Foata normal form. 66/5947 useless extension candidates. Maximal degree in co-relation 34020. Up to 4839 conditions per place. [2024-06-27 17:57:44,446 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 258 selfloop transitions, 84 changer transitions 0/357 dead transitions. [2024-06-27 17:57:44,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 357 transitions, 4978 flow [2024-06-27 17:57:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 17:57:44,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6361111111111111 [2024-06-27 17:57:44,447 INFO L175 Difference]: Start difference. First operand has 281 places, 320 transitions, 4164 flow. Second operand 8 states and 229 transitions. [2024-06-27 17:57:44,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 357 transitions, 4978 flow [2024-06-27 17:57:45,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 357 transitions, 4863 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:45,232 INFO L231 Difference]: Finished difference. Result has 285 places, 320 transitions, 4222 flow [2024-06-27 17:57:45,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4222, PETRI_PLACES=285, PETRI_TRANSITIONS=320} [2024-06-27 17:57:45,233 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 236 predicate places. [2024-06-27 17:57:45,233 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 320 transitions, 4222 flow [2024-06-27 17:57:45,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:45,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:45,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:45,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 17:57:45,233 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:45,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash 486661811, now seen corresponding path program 4 times [2024-06-27 17:57:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:45,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611005720] [2024-06-27 17:57:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:45,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:45,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:45,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611005720] [2024-06-27 17:57:45,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611005720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:45,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:45,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:45,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140139008] [2024-06-27 17:57:45,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:45,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:45,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:45,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:45,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:45,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:45,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 320 transitions, 4222 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:45,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:45,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:45,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:46,263 INFO L124 PetriNetUnfolderBase]: 3698/6261 cut-off events. [2024-06-27 17:57:46,263 INFO L125 PetriNetUnfolderBase]: For 288079/288143 co-relation queries the response was YES. [2024-06-27 17:57:46,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36269 conditions, 6261 events. 3698/6261 cut-off events. For 288079/288143 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 44603 event pairs, 861 based on Foata normal form. 98/6321 useless extension candidates. Maximal degree in co-relation 36145. Up to 4981 conditions per place. [2024-06-27 17:57:46,330 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 284 selfloop transitions, 58 changer transitions 0/357 dead transitions. [2024-06-27 17:57:46,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 357 transitions, 5068 flow [2024-06-27 17:57:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 17:57:46,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 17:57:46,331 INFO L175 Difference]: Start difference. First operand has 285 places, 320 transitions, 4222 flow. Second operand 8 states and 230 transitions. [2024-06-27 17:57:46,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 357 transitions, 5068 flow [2024-06-27 17:57:47,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 357 transitions, 4895 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:47,236 INFO L231 Difference]: Finished difference. Result has 286 places, 321 transitions, 4195 flow [2024-06-27 17:57:47,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4195, PETRI_PLACES=286, PETRI_TRANSITIONS=321} [2024-06-27 17:57:47,236 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 237 predicate places. [2024-06-27 17:57:47,237 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 321 transitions, 4195 flow [2024-06-27 17:57:47,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:47,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:47,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:47,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 17:57:47,237 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:47,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:47,237 INFO L85 PathProgramCache]: Analyzing trace with hash -926589719, now seen corresponding path program 5 times [2024-06-27 17:57:47,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:47,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160988208] [2024-06-27 17:57:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:47,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:47,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:47,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160988208] [2024-06-27 17:57:47,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160988208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:47,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:47,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:47,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140419548] [2024-06-27 17:57:47,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:47,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:47,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:47,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:47,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:47,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:47,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 321 transitions, 4195 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:47,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:47,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:47,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:48,402 INFO L124 PetriNetUnfolderBase]: 4215/7176 cut-off events. [2024-06-27 17:57:48,402 INFO L125 PetriNetUnfolderBase]: For 382365/382387 co-relation queries the response was YES. [2024-06-27 17:57:48,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43143 conditions, 7176 events. 4215/7176 cut-off events. For 382365/382387 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 53178 event pairs, 1372 based on Foata normal form. 52/7153 useless extension candidates. Maximal degree in co-relation 43018. Up to 4899 conditions per place. [2024-06-27 17:57:48,615 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 290 selfloop transitions, 61 changer transitions 0/366 dead transitions. [2024-06-27 17:57:48,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 366 transitions, 5293 flow [2024-06-27 17:57:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 17:57:48,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-27 17:57:48,616 INFO L175 Difference]: Start difference. First operand has 286 places, 321 transitions, 4195 flow. Second operand 8 states and 235 transitions. [2024-06-27 17:57:48,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 366 transitions, 5293 flow [2024-06-27 17:57:49,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 366 transitions, 5173 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:49,677 INFO L231 Difference]: Finished difference. Result has 288 places, 323 transitions, 4248 flow [2024-06-27 17:57:49,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4248, PETRI_PLACES=288, PETRI_TRANSITIONS=323} [2024-06-27 17:57:49,677 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 239 predicate places. [2024-06-27 17:57:49,678 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 323 transitions, 4248 flow [2024-06-27 17:57:49,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:49,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:49,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:49,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 17:57:49,678 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:49,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash 685963601, now seen corresponding path program 6 times [2024-06-27 17:57:49,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:49,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608953873] [2024-06-27 17:57:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:49,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:49,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:49,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608953873] [2024-06-27 17:57:49,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608953873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:49,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:49,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:49,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763701087] [2024-06-27 17:57:49,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:49,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:49,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:49,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:49,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:49,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:49,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 323 transitions, 4248 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:49,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:49,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:49,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:50,841 INFO L124 PetriNetUnfolderBase]: 4146/7121 cut-off events. [2024-06-27 17:57:50,841 INFO L125 PetriNetUnfolderBase]: For 312846/312868 co-relation queries the response was YES. [2024-06-27 17:57:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40281 conditions, 7121 events. 4146/7121 cut-off events. For 312846/312868 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 52965 event pairs, 1560 based on Foata normal form. 56/7091 useless extension candidates. Maximal degree in co-relation 40155. Up to 5685 conditions per place. [2024-06-27 17:57:50,921 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 290 selfloop transitions, 60 changer transitions 0/365 dead transitions. [2024-06-27 17:57:50,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 365 transitions, 5106 flow [2024-06-27 17:57:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2024-06-27 17:57:50,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177777777777778 [2024-06-27 17:57:50,922 INFO L175 Difference]: Start difference. First operand has 288 places, 323 transitions, 4248 flow. Second operand 10 states and 278 transitions. [2024-06-27 17:57:50,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 365 transitions, 5106 flow [2024-06-27 17:57:51,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 365 transitions, 5020 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:51,983 INFO L231 Difference]: Finished difference. Result has 294 places, 323 transitions, 4290 flow [2024-06-27 17:57:51,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4162, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4290, PETRI_PLACES=294, PETRI_TRANSITIONS=323} [2024-06-27 17:57:51,983 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 245 predicate places. [2024-06-27 17:57:51,983 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 323 transitions, 4290 flow [2024-06-27 17:57:51,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:51,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:51,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:51,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 17:57:51,984 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:51,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash 463430663, now seen corresponding path program 1 times [2024-06-27 17:57:51,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:51,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983344420] [2024-06-27 17:57:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:51,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:52,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:52,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983344420] [2024-06-27 17:57:52,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983344420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:52,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:52,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:52,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565073703] [2024-06-27 17:57:52,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:52,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:52,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:52,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:52,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:52,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 323 transitions, 4290 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:52,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:52,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:52,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:53,237 INFO L124 PetriNetUnfolderBase]: 4352/7427 cut-off events. [2024-06-27 17:57:53,238 INFO L125 PetriNetUnfolderBase]: For 307746/307768 co-relation queries the response was YES. [2024-06-27 17:57:53,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41955 conditions, 7427 events. 4352/7427 cut-off events. For 307746/307768 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 55358 event pairs, 1466 based on Foata normal form. 52/7404 useless extension candidates. Maximal degree in co-relation 41827. Up to 5113 conditions per place. [2024-06-27 17:57:53,316 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 293 selfloop transitions, 66 changer transitions 0/374 dead transitions. [2024-06-27 17:57:53,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 374 transitions, 5278 flow [2024-06-27 17:57:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 282 transitions. [2024-06-27 17:57:53,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-27 17:57:53,321 INFO L175 Difference]: Start difference. First operand has 294 places, 323 transitions, 4290 flow. Second operand 10 states and 282 transitions. [2024-06-27 17:57:53,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 374 transitions, 5278 flow [2024-06-27 17:57:54,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 374 transitions, 5142 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 17:57:54,243 INFO L231 Difference]: Finished difference. Result has 296 places, 326 transitions, 4367 flow [2024-06-27 17:57:54,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4367, PETRI_PLACES=296, PETRI_TRANSITIONS=326} [2024-06-27 17:57:54,244 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 247 predicate places. [2024-06-27 17:57:54,244 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 326 transitions, 4367 flow [2024-06-27 17:57:54,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:54,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:54,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:54,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 17:57:54,244 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:54,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1991939125, now seen corresponding path program 8 times [2024-06-27 17:57:54,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:54,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512062334] [2024-06-27 17:57:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:54,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:54,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:54,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512062334] [2024-06-27 17:57:54,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512062334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:54,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:54,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:54,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014217476] [2024-06-27 17:57:54,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:54,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:54,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:54,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:54,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:54,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:54,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 326 transitions, 4367 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:54,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:54,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:54,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:55,465 INFO L124 PetriNetUnfolderBase]: 4363/7253 cut-off events. [2024-06-27 17:57:55,465 INFO L125 PetriNetUnfolderBase]: For 235694/235754 co-relation queries the response was YES. [2024-06-27 17:57:55,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42145 conditions, 7253 events. 4363/7253 cut-off events. For 235694/235754 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 53055 event pairs, 1101 based on Foata normal form. 61/7271 useless extension candidates. Maximal degree in co-relation 42015. Up to 5998 conditions per place. [2024-06-27 17:57:55,530 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 189 selfloop transitions, 160 changer transitions 0/364 dead transitions. [2024-06-27 17:57:55,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 364 transitions, 5519 flow [2024-06-27 17:57:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:55,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 17:57:55,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-27 17:57:55,531 INFO L175 Difference]: Start difference. First operand has 296 places, 326 transitions, 4367 flow. Second operand 8 states and 233 transitions. [2024-06-27 17:57:55,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 364 transitions, 5519 flow [2024-06-27 17:57:56,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 364 transitions, 5427 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:56,505 INFO L231 Difference]: Finished difference. Result has 298 places, 329 transitions, 4659 flow [2024-06-27 17:57:56,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4275, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4659, PETRI_PLACES=298, PETRI_TRANSITIONS=329} [2024-06-27 17:57:56,506 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 249 predicate places. [2024-06-27 17:57:56,506 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 329 transitions, 4659 flow [2024-06-27 17:57:56,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:56,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:56,506 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] [2024-06-27 17:57:56,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 17:57:56,506 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:56,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2061790287, now seen corresponding path program 9 times [2024-06-27 17:57:56,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:56,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194378411] [2024-06-27 17:57:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:56,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:56,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:56,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194378411] [2024-06-27 17:57:56,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194378411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:56,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:56,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:56,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687417555] [2024-06-27 17:57:56,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:56,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:56,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:56,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:56,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:56,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:56,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 329 transitions, 4659 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:56,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:56,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:56,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:57,644 INFO L124 PetriNetUnfolderBase]: 4388/7486 cut-off events. [2024-06-27 17:57:57,644 INFO L125 PetriNetUnfolderBase]: For 247303/247357 co-relation queries the response was YES. [2024-06-27 17:57:57,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43301 conditions, 7486 events. 4388/7486 cut-off events. For 247303/247357 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 55809 event pairs, 1276 based on Foata normal form. 55/7483 useless extension candidates. Maximal degree in co-relation 43169. Up to 6025 conditions per place. [2024-06-27 17:57:57,726 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 192 selfloop transitions, 161 changer transitions 0/368 dead transitions. [2024-06-27 17:57:57,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 368 transitions, 6041 flow [2024-06-27 17:57:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:57:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:57:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 17:57:57,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:57:57,727 INFO L175 Difference]: Start difference. First operand has 298 places, 329 transitions, 4659 flow. Second operand 8 states and 232 transitions. [2024-06-27 17:57:57,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 368 transitions, 6041 flow [2024-06-27 17:57:58,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 368 transitions, 5567 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:58,864 INFO L231 Difference]: Finished difference. Result has 300 places, 335 transitions, 4641 flow [2024-06-27 17:57:58,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4233, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4641, PETRI_PLACES=300, PETRI_TRANSITIONS=335} [2024-06-27 17:57:58,865 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 251 predicate places. [2024-06-27 17:57:58,865 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 335 transitions, 4641 flow [2024-06-27 17:57:58,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:58,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:58,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:58,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 17:57:58,866 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:58,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2007808971, now seen corresponding path program 10 times [2024-06-27 17:57:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:58,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353697973] [2024-06-27 17:57:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:58,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:58,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353697973] [2024-06-27 17:57:58,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353697973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:58,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:58,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:57:58,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346384959] [2024-06-27 17:57:58,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:58,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:57:58,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:58,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:57:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:57:58,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:57:58,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 335 transitions, 4641 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:58,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:58,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:57:58,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:00,147 INFO L124 PetriNetUnfolderBase]: 4385/7489 cut-off events. [2024-06-27 17:58:00,147 INFO L125 PetriNetUnfolderBase]: For 246402/246456 co-relation queries the response was YES. [2024-06-27 17:58:00,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43037 conditions, 7489 events. 4385/7489 cut-off events. For 246402/246456 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 55854 event pairs, 1282 based on Foata normal form. 55/7485 useless extension candidates. Maximal degree in co-relation 42904. Up to 6022 conditions per place. [2024-06-27 17:58:00,232 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 192 selfloop transitions, 160 changer transitions 0/367 dead transitions. [2024-06-27 17:58:00,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 367 transitions, 5741 flow [2024-06-27 17:58:00,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 17:58:00,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:58:00,233 INFO L175 Difference]: Start difference. First operand has 300 places, 335 transitions, 4641 flow. Second operand 8 states and 232 transitions. [2024-06-27 17:58:00,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 367 transitions, 5741 flow [2024-06-27 17:58:01,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 367 transitions, 5406 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:01,419 INFO L231 Difference]: Finished difference. Result has 304 places, 335 transitions, 4632 flow [2024-06-27 17:58:01,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4306, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4632, PETRI_PLACES=304, PETRI_TRANSITIONS=335} [2024-06-27 17:58:01,419 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 255 predicate places. [2024-06-27 17:58:01,420 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 335 transitions, 4632 flow [2024-06-27 17:58:01,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:01,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:01,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:01,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 17:58:01,420 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:01,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash -463590415, now seen corresponding path program 11 times [2024-06-27 17:58:01,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:01,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094266753] [2024-06-27 17:58:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:01,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:01,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:01,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094266753] [2024-06-27 17:58:01,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094266753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:01,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:01,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:01,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55251325] [2024-06-27 17:58:01,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:01,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:01,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:01,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:01,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 335 transitions, 4632 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:01,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:01,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:01,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:02,570 INFO L124 PetriNetUnfolderBase]: 4396/7427 cut-off events. [2024-06-27 17:58:02,570 INFO L125 PetriNetUnfolderBase]: For 249371/249392 co-relation queries the response was YES. [2024-06-27 17:58:02,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43140 conditions, 7427 events. 4396/7427 cut-off events. For 249371/249392 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 55150 event pairs, 1870 based on Foata normal form. 22/7388 useless extension candidates. Maximal degree in co-relation 43006. Up to 6555 conditions per place. [2024-06-27 17:58:02,656 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 322 selfloop transitions, 28 changer transitions 0/365 dead transitions. [2024-06-27 17:58:02,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 365 transitions, 5453 flow [2024-06-27 17:58:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:02,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 17:58:02,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-27 17:58:02,657 INFO L175 Difference]: Start difference. First operand has 304 places, 335 transitions, 4632 flow. Second operand 8 states and 217 transitions. [2024-06-27 17:58:02,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 365 transitions, 5453 flow [2024-06-27 17:58:04,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 365 transitions, 5119 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:04,143 INFO L231 Difference]: Finished difference. Result has 305 places, 338 transitions, 4415 flow [2024-06-27 17:58:04,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4304, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4415, PETRI_PLACES=305, PETRI_TRANSITIONS=338} [2024-06-27 17:58:04,143 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 256 predicate places. [2024-06-27 17:58:04,143 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 338 transitions, 4415 flow [2024-06-27 17:58:04,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:04,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:04,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:04,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 17:58:04,144 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:04,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash 757290289, now seen corresponding path program 12 times [2024-06-27 17:58:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:04,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006878594] [2024-06-27 17:58:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:04,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:04,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006878594] [2024-06-27 17:58:04,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006878594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:04,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:04,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:04,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533107611] [2024-06-27 17:58:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:04,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:04,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:04,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:04,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:04,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:04,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 338 transitions, 4415 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:04,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:04,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:04,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:05,257 INFO L124 PetriNetUnfolderBase]: 4421/7403 cut-off events. [2024-06-27 17:58:05,257 INFO L125 PetriNetUnfolderBase]: For 255382/255442 co-relation queries the response was YES. [2024-06-27 17:58:05,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42830 conditions, 7403 events. 4421/7403 cut-off events. For 255382/255442 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 54625 event pairs, 1125 based on Foata normal form. 61/7419 useless extension candidates. Maximal degree in co-relation 42695. Up to 6061 conditions per place. [2024-06-27 17:58:05,342 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 188 selfloop transitions, 170 changer transitions 0/373 dead transitions. [2024-06-27 17:58:05,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 373 transitions, 5625 flow [2024-06-27 17:58:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 17:58:05,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6361111111111111 [2024-06-27 17:58:05,343 INFO L175 Difference]: Start difference. First operand has 305 places, 338 transitions, 4415 flow. Second operand 8 states and 229 transitions. [2024-06-27 17:58:05,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 373 transitions, 5625 flow [2024-06-27 17:58:06,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 373 transitions, 5545 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:06,506 INFO L231 Difference]: Finished difference. Result has 307 places, 344 transitions, 4779 flow [2024-06-27 17:58:06,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4779, PETRI_PLACES=307, PETRI_TRANSITIONS=344} [2024-06-27 17:58:06,506 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 258 predicate places. [2024-06-27 17:58:06,506 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 344 transitions, 4779 flow [2024-06-27 17:58:06,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:06,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:06,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:06,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 17:58:06,507 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:06,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash -863443915, now seen corresponding path program 13 times [2024-06-27 17:58:06,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:06,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383875655] [2024-06-27 17:58:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:06,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:06,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:06,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383875655] [2024-06-27 17:58:06,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383875655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:06,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:06,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723416170] [2024-06-27 17:58:06,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:06,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:06,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:06,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:06,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:06,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:06,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 344 transitions, 4779 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:06,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:06,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:06,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:07,688 INFO L124 PetriNetUnfolderBase]: 4418/7399 cut-off events. [2024-06-27 17:58:07,688 INFO L125 PetriNetUnfolderBase]: For 259161/259221 co-relation queries the response was YES. [2024-06-27 17:58:07,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43332 conditions, 7399 events. 4418/7399 cut-off events. For 259161/259221 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 54577 event pairs, 1125 based on Foata normal form. 61/7415 useless extension candidates. Maximal degree in co-relation 43196. Up to 6058 conditions per place. [2024-06-27 17:58:07,763 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 186 selfloop transitions, 171 changer transitions 0/372 dead transitions. [2024-06-27 17:58:07,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 372 transitions, 5729 flow [2024-06-27 17:58:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:58:07,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 17:58:07,764 INFO L175 Difference]: Start difference. First operand has 307 places, 344 transitions, 4779 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:58:07,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 372 transitions, 5729 flow [2024-06-27 17:58:08,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 372 transitions, 5425 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:08,895 INFO L231 Difference]: Finished difference. Result has 311 places, 344 transitions, 4823 flow [2024-06-27 17:58:08,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4823, PETRI_PLACES=311, PETRI_TRANSITIONS=344} [2024-06-27 17:58:08,895 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 262 predicate places. [2024-06-27 17:58:08,895 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 344 transitions, 4823 flow [2024-06-27 17:58:08,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:08,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:08,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:08,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 17:58:08,896 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:08,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash 57996589, now seen corresponding path program 14 times [2024-06-27 17:58:08,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:08,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52812437] [2024-06-27 17:58:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:08,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:08,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52812437] [2024-06-27 17:58:08,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52812437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:08,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:08,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:08,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640359899] [2024-06-27 17:58:08,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:08,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:08,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:08,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:09,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:09,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 344 transitions, 4823 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:09,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:09,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:09,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:10,098 INFO L124 PetriNetUnfolderBase]: 4443/7481 cut-off events. [2024-06-27 17:58:10,098 INFO L125 PetriNetUnfolderBase]: For 270082/270136 co-relation queries the response was YES. [2024-06-27 17:58:10,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43780 conditions, 7481 events. 4443/7481 cut-off events. For 270082/270136 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55264 event pairs, 1364 based on Foata normal form. 55/7491 useless extension candidates. Maximal degree in co-relation 43643. Up to 6457 conditions per place. [2024-06-27 17:58:10,181 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 300 selfloop transitions, 73 changer transitions 0/388 dead transitions. [2024-06-27 17:58:10,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 388 transitions, 6113 flow [2024-06-27 17:58:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 17:58:10,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-27 17:58:10,182 INFO L175 Difference]: Start difference. First operand has 311 places, 344 transitions, 4823 flow. Second operand 7 states and 216 transitions. [2024-06-27 17:58:10,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 388 transitions, 6113 flow [2024-06-27 17:58:11,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 388 transitions, 5755 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:11,332 INFO L231 Difference]: Finished difference. Result has 312 places, 350 transitions, 4789 flow [2024-06-27 17:58:11,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4789, PETRI_PLACES=312, PETRI_TRANSITIONS=350} [2024-06-27 17:58:11,332 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 263 predicate places. [2024-06-27 17:58:11,332 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 350 transitions, 4789 flow [2024-06-27 17:58:11,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:11,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:11,332 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] [2024-06-27 17:58:11,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 17:58:11,333 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:11,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:11,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2125681363, now seen corresponding path program 15 times [2024-06-27 17:58:11,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:11,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086224745] [2024-06-27 17:58:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:11,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:11,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:11,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086224745] [2024-06-27 17:58:11,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086224745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:11,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:11,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:11,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585234446] [2024-06-27 17:58:11,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:11,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:11,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:11,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:11,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:11,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 350 transitions, 4789 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:11,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:11,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:11,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:12,522 INFO L124 PetriNetUnfolderBase]: 4440/7457 cut-off events. [2024-06-27 17:58:12,523 INFO L125 PetriNetUnfolderBase]: For 269264/269324 co-relation queries the response was YES. [2024-06-27 17:58:12,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43477 conditions, 7457 events. 4440/7457 cut-off events. For 269264/269324 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55008 event pairs, 1351 based on Foata normal form. 61/7475 useless extension candidates. Maximal degree in co-relation 43338. Up to 6454 conditions per place. [2024-06-27 17:58:12,606 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 305 selfloop transitions, 73 changer transitions 0/393 dead transitions. [2024-06-27 17:58:12,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 393 transitions, 5825 flow [2024-06-27 17:58:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-27 17:58:12,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-27 17:58:12,607 INFO L175 Difference]: Start difference. First operand has 312 places, 350 transitions, 4789 flow. Second operand 8 states and 243 transitions. [2024-06-27 17:58:12,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 393 transitions, 5825 flow [2024-06-27 17:58:13,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 393 transitions, 5575 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:13,874 INFO L231 Difference]: Finished difference. Result has 313 places, 350 transitions, 4699 flow [2024-06-27 17:58:13,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4699, PETRI_PLACES=313, PETRI_TRANSITIONS=350} [2024-06-27 17:58:13,875 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 264 predicate places. [2024-06-27 17:58:13,875 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 350 transitions, 4699 flow [2024-06-27 17:58:13,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:13,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:13,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:13,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 17:58:13,875 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:13,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:13,876 INFO L85 PathProgramCache]: Analyzing trace with hash 249027871, now seen corresponding path program 16 times [2024-06-27 17:58:13,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:13,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459985867] [2024-06-27 17:58:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:13,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:13,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:13,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459985867] [2024-06-27 17:58:13,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459985867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:13,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:13,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:13,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028466158] [2024-06-27 17:58:13,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:13,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:13,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:13,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:13,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:14,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:14,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 350 transitions, 4699 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:14,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:14,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:14,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:15,096 INFO L124 PetriNetUnfolderBase]: 4437/7595 cut-off events. [2024-06-27 17:58:15,096 INFO L125 PetriNetUnfolderBase]: For 272307/272329 co-relation queries the response was YES. [2024-06-27 17:58:15,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43509 conditions, 7595 events. 4437/7595 cut-off events. For 272307/272329 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 57104 event pairs, 1845 based on Foata normal form. 23/7527 useless extension candidates. Maximal degree in co-relation 43371. Up to 6550 conditions per place. [2024-06-27 17:58:15,330 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 324 selfloop transitions, 44 changer transitions 0/383 dead transitions. [2024-06-27 17:58:15,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 383 transitions, 5523 flow [2024-06-27 17:58:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 17:58:15,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 17:58:15,331 INFO L175 Difference]: Start difference. First operand has 313 places, 350 transitions, 4699 flow. Second operand 6 states and 185 transitions. [2024-06-27 17:58:15,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 383 transitions, 5523 flow [2024-06-27 17:58:16,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 383 transitions, 5330 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:16,360 INFO L231 Difference]: Finished difference. Result has 311 places, 350 transitions, 4613 flow [2024-06-27 17:58:16,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4613, PETRI_PLACES=311, PETRI_TRANSITIONS=350} [2024-06-27 17:58:16,360 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 262 predicate places. [2024-06-27 17:58:16,360 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 350 transitions, 4613 flow [2024-06-27 17:58:16,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:16,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:16,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:16,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 17:58:16,361 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:16,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:16,361 INFO L85 PathProgramCache]: Analyzing trace with hash -780670543, now seen corresponding path program 17 times [2024-06-27 17:58:16,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:16,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003476170] [2024-06-27 17:58:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:16,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003476170] [2024-06-27 17:58:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003476170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:16,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:16,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:16,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572702088] [2024-06-27 17:58:16,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:16,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:16,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:16,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:16,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:16,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:16,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 350 transitions, 4613 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:16,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:16,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:16,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:17,514 INFO L124 PetriNetUnfolderBase]: 4448/7392 cut-off events. [2024-06-27 17:58:17,514 INFO L125 PetriNetUnfolderBase]: For 269533/269593 co-relation queries the response was YES. [2024-06-27 17:58:17,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43170 conditions, 7392 events. 4448/7392 cut-off events. For 269533/269593 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 54292 event pairs, 1146 based on Foata normal form. 61/7404 useless extension candidates. Maximal degree in co-relation 43032. Up to 6260 conditions per place. [2024-06-27 17:58:17,596 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 243 selfloop transitions, 124 changer transitions 0/382 dead transitions. [2024-06-27 17:58:17,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 382 transitions, 5817 flow [2024-06-27 17:58:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:17,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:17,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:58:17,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-27 17:58:17,597 INFO L175 Difference]: Start difference. First operand has 311 places, 350 transitions, 4613 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:58:17,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 382 transitions, 5817 flow [2024-06-27 17:58:18,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 382 transitions, 5763 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:18,531 INFO L231 Difference]: Finished difference. Result has 315 places, 353 transitions, 4871 flow [2024-06-27 17:58:18,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4559, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4871, PETRI_PLACES=315, PETRI_TRANSITIONS=353} [2024-06-27 17:58:18,531 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 266 predicate places. [2024-06-27 17:58:18,531 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 353 transitions, 4871 flow [2024-06-27 17:58:18,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:18,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:18,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:18,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 17:58:18,532 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:18,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash -781026733, now seen corresponding path program 18 times [2024-06-27 17:58:18,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:18,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590434906] [2024-06-27 17:58:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:18,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:18,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:18,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590434906] [2024-06-27 17:58:18,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590434906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:18,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:18,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:18,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654572250] [2024-06-27 17:58:18,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:18,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:18,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:18,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:18,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:18,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 353 transitions, 4871 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:18,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:18,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:18,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:19,688 INFO L124 PetriNetUnfolderBase]: 4445/7388 cut-off events. [2024-06-27 17:58:19,689 INFO L125 PetriNetUnfolderBase]: For 273074/273134 co-relation queries the response was YES. [2024-06-27 17:58:19,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43488 conditions, 7388 events. 4445/7388 cut-off events. For 273074/273134 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 54314 event pairs, 1146 based on Foata normal form. 61/7400 useless extension candidates. Maximal degree in co-relation 43349. Up to 6257 conditions per place. [2024-06-27 17:58:19,771 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 243 selfloop transitions, 126 changer transitions 0/384 dead transitions. [2024-06-27 17:58:19,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 384 transitions, 5861 flow [2024-06-27 17:58:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:58:19,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-27 17:58:19,772 INFO L175 Difference]: Start difference. First operand has 315 places, 353 transitions, 4871 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:58:19,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 384 transitions, 5861 flow [2024-06-27 17:58:20,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 384 transitions, 5366 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:20,928 INFO L231 Difference]: Finished difference. Result has 315 places, 353 transitions, 4634 flow [2024-06-27 17:58:20,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4376, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4634, PETRI_PLACES=315, PETRI_TRANSITIONS=353} [2024-06-27 17:58:20,928 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 266 predicate places. [2024-06-27 17:58:20,929 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 353 transitions, 4634 flow [2024-06-27 17:58:20,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:20,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:20,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:20,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 17:58:20,929 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:20,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:20,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1806130767, now seen corresponding path program 19 times [2024-06-27 17:58:20,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:20,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122610777] [2024-06-27 17:58:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:20,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:21,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:21,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122610777] [2024-06-27 17:58:21,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122610777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:21,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:21,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:21,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229184718] [2024-06-27 17:58:21,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:21,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:21,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:21,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:21,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:21,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:21,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 353 transitions, 4634 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:21,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:21,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:21,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:22,166 INFO L124 PetriNetUnfolderBase]: 4470/7822 cut-off events. [2024-06-27 17:58:22,166 INFO L125 PetriNetUnfolderBase]: For 280771/280831 co-relation queries the response was YES. [2024-06-27 17:58:22,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43985 conditions, 7822 events. 4470/7822 cut-off events. For 280771/280831 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 59198 event pairs, 1325 based on Foata normal form. 61/7842 useless extension candidates. Maximal degree in co-relation 43846. Up to 6284 conditions per place. [2024-06-27 17:58:22,263 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 250 selfloop transitions, 138 changer transitions 0/403 dead transitions. [2024-06-27 17:58:22,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 403 transitions, 5992 flow [2024-06-27 17:58:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2024-06-27 17:58:22,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654320987654321 [2024-06-27 17:58:22,264 INFO L175 Difference]: Start difference. First operand has 315 places, 353 transitions, 4634 flow. Second operand 9 states and 265 transitions. [2024-06-27 17:58:22,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 403 transitions, 5992 flow [2024-06-27 17:58:23,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 403 transitions, 5682 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:23,951 INFO L231 Difference]: Finished difference. Result has 317 places, 359 transitions, 4732 flow [2024-06-27 17:58:23,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4336, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4732, PETRI_PLACES=317, PETRI_TRANSITIONS=359} [2024-06-27 17:58:23,951 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 268 predicate places. [2024-06-27 17:58:23,951 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 359 transitions, 4732 flow [2024-06-27 17:58:23,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:23,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:23,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:23,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 17:58:23,952 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:23,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1806486957, now seen corresponding path program 20 times [2024-06-27 17:58:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:23,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046624108] [2024-06-27 17:58:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:23,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:24,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:24,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046624108] [2024-06-27 17:58:24,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046624108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:24,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:24,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:24,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730946977] [2024-06-27 17:58:24,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:24,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:24,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:24,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:24,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:24,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:24,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 359 transitions, 4732 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:24,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:24,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:24,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:25,131 INFO L124 PetriNetUnfolderBase]: 4467/7449 cut-off events. [2024-06-27 17:58:25,131 INFO L125 PetriNetUnfolderBase]: For 279396/279458 co-relation queries the response was YES. [2024-06-27 17:58:25,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43559 conditions, 7449 events. 4467/7449 cut-off events. For 279396/279458 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 54761 event pairs, 1112 based on Foata normal form. 63/7473 useless extension candidates. Maximal degree in co-relation 43419. Up to 6281 conditions per place. [2024-06-27 17:58:25,220 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 250 selfloop transitions, 140 changer transitions 0/405 dead transitions. [2024-06-27 17:58:25,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 405 transitions, 5808 flow [2024-06-27 17:58:25,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 268 transitions. [2024-06-27 17:58:25,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6617283950617284 [2024-06-27 17:58:25,221 INFO L175 Difference]: Start difference. First operand has 317 places, 359 transitions, 4732 flow. Second operand 9 states and 268 transitions. [2024-06-27 17:58:25,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 405 transitions, 5808 flow [2024-06-27 17:58:26,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 405 transitions, 5472 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:26,458 INFO L231 Difference]: Finished difference. Result has 319 places, 359 transitions, 4688 flow [2024-06-27 17:58:26,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4398, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4688, PETRI_PLACES=319, PETRI_TRANSITIONS=359} [2024-06-27 17:58:26,458 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 270 predicate places. [2024-06-27 17:58:26,458 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 359 transitions, 4688 flow [2024-06-27 17:58:26,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:26,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:26,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:26,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 17:58:26,459 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:26,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:26,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1800768387, now seen corresponding path program 21 times [2024-06-27 17:58:26,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:26,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87843322] [2024-06-27 17:58:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:26,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:26,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:26,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87843322] [2024-06-27 17:58:26,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87843322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:26,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:26,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:26,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870629964] [2024-06-27 17:58:26,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:26,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:26,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:26,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:26,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 359 transitions, 4688 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:26,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:26,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:26,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,797 INFO L124 PetriNetUnfolderBase]: 4464/7420 cut-off events. [2024-06-27 17:58:27,797 INFO L125 PetriNetUnfolderBase]: For 274540/274604 co-relation queries the response was YES. [2024-06-27 17:58:27,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43328 conditions, 7420 events. 4464/7420 cut-off events. For 274540/274604 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 54333 event pairs, 1097 based on Foata normal form. 65/7449 useless extension candidates. Maximal degree in co-relation 43188. Up to 6278 conditions per place. [2024-06-27 17:58:27,882 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 242 selfloop transitions, 144 changer transitions 0/401 dead transitions. [2024-06-27 17:58:27,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 401 transitions, 5572 flow [2024-06-27 17:58:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:58:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:58:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 283 transitions. [2024-06-27 17:58:27,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6288888888888889 [2024-06-27 17:58:27,883 INFO L175 Difference]: Start difference. First operand has 319 places, 359 transitions, 4688 flow. Second operand 10 states and 283 transitions. [2024-06-27 17:58:27,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 401 transitions, 5572 flow [2024-06-27 17:58:29,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 401 transitions, 5236 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 17:58:29,941 INFO L231 Difference]: Finished difference. Result has 320 places, 359 transitions, 4650 flow [2024-06-27 17:58:29,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4352, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4650, PETRI_PLACES=320, PETRI_TRANSITIONS=359} [2024-06-27 17:58:29,942 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 271 predicate places. [2024-06-27 17:58:29,942 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 359 transitions, 4650 flow [2024-06-27 17:58:29,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:29,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:29,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:29,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 17:58:29,943 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:29,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:29,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1954188813, now seen corresponding path program 4 times [2024-06-27 17:58:29,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:29,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458607697] [2024-06-27 17:58:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:29,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:30,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:30,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458607697] [2024-06-27 17:58:30,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458607697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:30,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:30,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:30,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062039353] [2024-06-27 17:58:30,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:30,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:30,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:30,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:30,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:30,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:30,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 359 transitions, 4650 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:30,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:30,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:30,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:31,117 INFO L124 PetriNetUnfolderBase]: 4451/7495 cut-off events. [2024-06-27 17:58:31,117 INFO L125 PetriNetUnfolderBase]: For 270597/270661 co-relation queries the response was YES. [2024-06-27 17:58:31,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42750 conditions, 7495 events. 4451/7495 cut-off events. For 270597/270661 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 54964 event pairs, 1013 based on Foata normal form. 70/7530 useless extension candidates. Maximal degree in co-relation 42610. Up to 5965 conditions per place. [2024-06-27 17:58:31,200 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 328 selfloop transitions, 59 changer transitions 0/402 dead transitions. [2024-06-27 17:58:31,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 402 transitions, 5574 flow [2024-06-27 17:58:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 17:58:31,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730158730158731 [2024-06-27 17:58:31,201 INFO L175 Difference]: Start difference. First operand has 320 places, 359 transitions, 4650 flow. Second operand 7 states and 212 transitions. [2024-06-27 17:58:31,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 402 transitions, 5574 flow [2024-06-27 17:58:32,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 402 transitions, 5174 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-27 17:58:32,905 INFO L231 Difference]: Finished difference. Result has 316 places, 359 transitions, 4378 flow [2024-06-27 17:58:32,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4250, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4378, PETRI_PLACES=316, PETRI_TRANSITIONS=359} [2024-06-27 17:58:32,906 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 267 predicate places. [2024-06-27 17:58:32,906 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 359 transitions, 4378 flow [2024-06-27 17:58:32,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:32,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:32,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:32,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 17:58:32,906 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:32,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:32,906 INFO L85 PathProgramCache]: Analyzing trace with hash -475781453, now seen corresponding path program 7 times [2024-06-27 17:58:32,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:32,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154569698] [2024-06-27 17:58:32,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:32,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:32,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:32,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154569698] [2024-06-27 17:58:32,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154569698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:32,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:32,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:32,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997680099] [2024-06-27 17:58:32,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:32,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:32,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:32,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:32,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:33,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:33,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 359 transitions, 4378 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:33,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:33,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:33,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:34,167 INFO L124 PetriNetUnfolderBase]: 4579/7727 cut-off events. [2024-06-27 17:58:34,167 INFO L125 PetriNetUnfolderBase]: For 304365/304423 co-relation queries the response was YES. [2024-06-27 17:58:34,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44490 conditions, 7727 events. 4579/7727 cut-off events. For 304365/304423 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 57587 event pairs, 1282 based on Foata normal form. 64/7742 useless extension candidates. Maximal degree in co-relation 44350. Up to 6365 conditions per place. [2024-06-27 17:58:34,250 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 298 selfloop transitions, 90 changer transitions 0/403 dead transitions. [2024-06-27 17:58:34,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 403 transitions, 5520 flow [2024-06-27 17:58:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 17:58:34,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-27 17:58:34,251 INFO L175 Difference]: Start difference. First operand has 316 places, 359 transitions, 4378 flow. Second operand 8 states and 233 transitions. [2024-06-27 17:58:34,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 403 transitions, 5520 flow [2024-06-27 17:58:35,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 403 transitions, 5399 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:35,363 INFO L231 Difference]: Finished difference. Result has 318 places, 361 transitions, 4491 flow [2024-06-27 17:58:35,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4491, PETRI_PLACES=318, PETRI_TRANSITIONS=361} [2024-06-27 17:58:35,363 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 269 predicate places. [2024-06-27 17:58:35,363 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 361 transitions, 4491 flow [2024-06-27 17:58:35,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:35,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:35,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:35,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 17:58:35,364 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:35,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1610894139, now seen corresponding path program 8 times [2024-06-27 17:58:35,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:35,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789892693] [2024-06-27 17:58:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:35,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:35,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:35,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789892693] [2024-06-27 17:58:35,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789892693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:35,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:35,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:35,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576441957] [2024-06-27 17:58:35,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:35,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:35,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:35,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:35,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:35,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 361 transitions, 4491 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:35,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:35,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:35,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:36,592 INFO L124 PetriNetUnfolderBase]: 4643/7862 cut-off events. [2024-06-27 17:58:36,592 INFO L125 PetriNetUnfolderBase]: For 298212/298270 co-relation queries the response was YES. [2024-06-27 17:58:36,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44949 conditions, 7862 events. 4643/7862 cut-off events. For 298212/298270 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 58985 event pairs, 1328 based on Foata normal form. 66/7877 useless extension candidates. Maximal degree in co-relation 44810. Up to 6669 conditions per place. [2024-06-27 17:58:36,680 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 297 selfloop transitions, 84 changer transitions 0/396 dead transitions. [2024-06-27 17:58:36,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 396 transitions, 5397 flow [2024-06-27 17:58:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:58:36,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-27 17:58:36,681 INFO L175 Difference]: Start difference. First operand has 318 places, 361 transitions, 4491 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:58:36,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 396 transitions, 5397 flow [2024-06-27 17:58:37,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 396 transitions, 5275 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:37,982 INFO L231 Difference]: Finished difference. Result has 322 places, 362 transitions, 4566 flow [2024-06-27 17:58:37,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4373, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4566, PETRI_PLACES=322, PETRI_TRANSITIONS=362} [2024-06-27 17:58:37,983 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 273 predicate places. [2024-06-27 17:58:37,983 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 362 transitions, 4566 flow [2024-06-27 17:58:37,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:37,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:37,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:37,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 17:58:37,983 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:37,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2007593707, now seen corresponding path program 9 times [2024-06-27 17:58:37,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:37,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553568247] [2024-06-27 17:58:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:37,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:38,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553568247] [2024-06-27 17:58:38,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553568247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:38,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:38,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:38,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116745080] [2024-06-27 17:58:38,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:38,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:38,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:38,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:38,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:38,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 362 transitions, 4566 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:38,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:38,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:38,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:39,261 INFO L124 PetriNetUnfolderBase]: 4689/7931 cut-off events. [2024-06-27 17:58:39,261 INFO L125 PetriNetUnfolderBase]: For 295766/295824 co-relation queries the response was YES. [2024-06-27 17:58:39,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45466 conditions, 7931 events. 4689/7931 cut-off events. For 295766/295824 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 59555 event pairs, 1326 based on Foata normal form. 64/7944 useless extension candidates. Maximal degree in co-relation 45325. Up to 6671 conditions per place. [2024-06-27 17:58:39,345 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 299 selfloop transitions, 86 changer transitions 0/400 dead transitions. [2024-06-27 17:58:39,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 400 transitions, 5496 flow [2024-06-27 17:58:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 17:58:39,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6361111111111111 [2024-06-27 17:58:39,347 INFO L175 Difference]: Start difference. First operand has 322 places, 362 transitions, 4566 flow. Second operand 8 states and 229 transitions. [2024-06-27 17:58:39,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 400 transitions, 5496 flow [2024-06-27 17:58:40,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 400 transitions, 5323 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:40,680 INFO L231 Difference]: Finished difference. Result has 324 places, 363 transitions, 4591 flow [2024-06-27 17:58:40,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4591, PETRI_PLACES=324, PETRI_TRANSITIONS=363} [2024-06-27 17:58:40,680 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 275 predicate places. [2024-06-27 17:58:40,680 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 363 transitions, 4591 flow [2024-06-27 17:58:40,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:40,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:40,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:40,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 17:58:40,681 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:40,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:40,681 INFO L85 PathProgramCache]: Analyzing trace with hash 166856465, now seen corresponding path program 10 times [2024-06-27 17:58:40,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:40,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238607221] [2024-06-27 17:58:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:40,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:40,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238607221] [2024-06-27 17:58:40,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238607221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:40,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:40,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:40,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530261368] [2024-06-27 17:58:40,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:40,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:40,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:40,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:40,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:40,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:40,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 363 transitions, 4591 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:40,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:40,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:40,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:41,951 INFO L124 PetriNetUnfolderBase]: 4794/8026 cut-off events. [2024-06-27 17:58:41,951 INFO L125 PetriNetUnfolderBase]: For 323868/323926 co-relation queries the response was YES. [2024-06-27 17:58:42,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46985 conditions, 8026 events. 4794/8026 cut-off events. For 323868/323926 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 59953 event pairs, 1208 based on Foata normal form. 64/8045 useless extension candidates. Maximal degree in co-relation 46843. Up to 5382 conditions per place. [2024-06-27 17:58:42,047 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 284 selfloop transitions, 113 changer transitions 0/412 dead transitions. [2024-06-27 17:58:42,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 412 transitions, 5969 flow [2024-06-27 17:58:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:58:42,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 17:58:42,048 INFO L175 Difference]: Start difference. First operand has 324 places, 363 transitions, 4591 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:58:42,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 412 transitions, 5969 flow [2024-06-27 17:58:43,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 412 transitions, 5785 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:43,573 INFO L231 Difference]: Finished difference. Result has 326 places, 365 transitions, 4683 flow [2024-06-27 17:58:43,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4407, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4683, PETRI_PLACES=326, PETRI_TRANSITIONS=365} [2024-06-27 17:58:43,574 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 277 predicate places. [2024-06-27 17:58:43,574 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 365 transitions, 4683 flow [2024-06-27 17:58:43,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:43,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:43,574 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] [2024-06-27 17:58:43,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 17:58:43,574 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:43,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:43,574 INFO L85 PathProgramCache]: Analyzing trace with hash 739397137, now seen corresponding path program 11 times [2024-06-27 17:58:43,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:43,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409760800] [2024-06-27 17:58:43,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:43,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:43,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:43,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409760800] [2024-06-27 17:58:43,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409760800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:43,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:43,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:43,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690407388] [2024-06-27 17:58:43,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:43,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:43,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:43,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:43,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:43,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:43,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 365 transitions, 4683 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:43,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:43,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:43,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:44,854 INFO L124 PetriNetUnfolderBase]: 4899/8174 cut-off events. [2024-06-27 17:58:44,854 INFO L125 PetriNetUnfolderBase]: For 357080/357142 co-relation queries the response was YES. [2024-06-27 17:58:44,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49065 conditions, 8174 events. 4899/8174 cut-off events. For 357080/357142 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 61126 event pairs, 1182 based on Foata normal form. 68/8202 useless extension candidates. Maximal degree in co-relation 48922. Up to 5436 conditions per place. [2024-06-27 17:58:44,946 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 284 selfloop transitions, 113 changer transitions 0/412 dead transitions. [2024-06-27 17:58:44,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 412 transitions, 6053 flow [2024-06-27 17:58:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 17:58:44,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-27 17:58:44,947 INFO L175 Difference]: Start difference. First operand has 326 places, 365 transitions, 4683 flow. Second operand 8 states and 235 transitions. [2024-06-27 17:58:44,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 412 transitions, 6053 flow [2024-06-27 17:58:46,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 412 transitions, 5800 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:46,724 INFO L231 Difference]: Finished difference. Result has 329 places, 367 transitions, 4708 flow [2024-06-27 17:58:46,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4708, PETRI_PLACES=329, PETRI_TRANSITIONS=367} [2024-06-27 17:58:46,725 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 280 predicate places. [2024-06-27 17:58:46,725 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 367 transitions, 4708 flow [2024-06-27 17:58:46,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:46,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:46,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:46,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 17:58:46,726 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:46,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:46,726 INFO L85 PathProgramCache]: Analyzing trace with hash -153954771, now seen corresponding path program 12 times [2024-06-27 17:58:46,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:46,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106215134] [2024-06-27 17:58:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:46,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:46,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106215134] [2024-06-27 17:58:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106215134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:46,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:46,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:46,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114541078] [2024-06-27 17:58:46,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:46,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:46,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:46,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:46,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:46,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 367 transitions, 4708 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:46,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:46,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:46,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:48,022 INFO L124 PetriNetUnfolderBase]: 4886/8202 cut-off events. [2024-06-27 17:58:48,022 INFO L125 PetriNetUnfolderBase]: For 336864/336928 co-relation queries the response was YES. [2024-06-27 17:58:48,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48397 conditions, 8202 events. 4886/8202 cut-off events. For 336864/336928 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 61631 event pairs, 1298 based on Foata normal form. 70/8235 useless extension candidates. Maximal degree in co-relation 48253. Up to 6950 conditions per place. [2024-06-27 17:58:48,116 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 363 selfloop transitions, 30 changer transitions 0/408 dead transitions. [2024-06-27 17:58:48,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 408 transitions, 5654 flow [2024-06-27 17:58:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:58:48,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-27 17:58:48,117 INFO L175 Difference]: Start difference. First operand has 329 places, 367 transitions, 4708 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:58:48,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 408 transitions, 5654 flow [2024-06-27 17:58:50,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 408 transitions, 5475 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:50,212 INFO L231 Difference]: Finished difference. Result has 333 places, 367 transitions, 4593 flow [2024-06-27 17:58:50,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4529, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4593, PETRI_PLACES=333, PETRI_TRANSITIONS=367} [2024-06-27 17:58:50,212 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 284 predicate places. [2024-06-27 17:58:50,212 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 367 transitions, 4593 flow [2024-06-27 17:58:50,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:50,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:50,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:50,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 17:58:50,213 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:50,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:50,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1022858733, now seen corresponding path program 13 times [2024-06-27 17:58:50,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:50,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53336313] [2024-06-27 17:58:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:50,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:50,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:50,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53336313] [2024-06-27 17:58:50,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53336313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:50,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:50,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:50,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277632012] [2024-06-27 17:58:50,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:50,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:50,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:50,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:50,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:50,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:50,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 367 transitions, 4593 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:50,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:50,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:50,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:51,608 INFO L124 PetriNetUnfolderBase]: 4978/8335 cut-off events. [2024-06-27 17:58:51,609 INFO L125 PetriNetUnfolderBase]: For 342561/342625 co-relation queries the response was YES. [2024-06-27 17:58:51,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48451 conditions, 8335 events. 4978/8335 cut-off events. For 342561/342625 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 62819 event pairs, 1434 based on Foata normal form. 70/8364 useless extension candidates. Maximal degree in co-relation 48306. Up to 7230 conditions per place. [2024-06-27 17:58:51,713 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 365 selfloop transitions, 26 changer transitions 0/406 dead transitions. [2024-06-27 17:58:51,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 406 transitions, 5559 flow [2024-06-27 17:58:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 17:58:51,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-06-27 17:58:51,714 INFO L175 Difference]: Start difference. First operand has 333 places, 367 transitions, 4593 flow. Second operand 8 states and 223 transitions. [2024-06-27 17:58:51,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 406 transitions, 5559 flow [2024-06-27 17:58:53,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 406 transitions, 5476 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:53,474 INFO L231 Difference]: Finished difference. Result has 334 places, 369 transitions, 4602 flow [2024-06-27 17:58:53,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4602, PETRI_PLACES=334, PETRI_TRANSITIONS=369} [2024-06-27 17:58:53,475 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 285 predicate places. [2024-06-27 17:58:53,475 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 369 transitions, 4602 flow [2024-06-27 17:58:53,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:53,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:53,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:53,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 17:58:53,475 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:53,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1022846643, now seen corresponding path program 14 times [2024-06-27 17:58:53,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:53,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732328758] [2024-06-27 17:58:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:53,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:53,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:53,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732328758] [2024-06-27 17:58:53,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732328758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:53,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:53,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:53,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915589098] [2024-06-27 17:58:53,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:53,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:53,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:53,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:53,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 369 transitions, 4602 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:53,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:53,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:53,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:54,961 INFO L124 PetriNetUnfolderBase]: 5188/8687 cut-off events. [2024-06-27 17:58:54,961 INFO L125 PetriNetUnfolderBase]: For 418286/418348 co-relation queries the response was YES. [2024-06-27 17:58:55,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51899 conditions, 8687 events. 5188/8687 cut-off events. For 418286/418348 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 66269 event pairs, 1389 based on Foata normal form. 68/8713 useless extension candidates. Maximal degree in co-relation 51753. Up to 6768 conditions per place. [2024-06-27 17:58:55,066 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 302 selfloop transitions, 95 changer transitions 0/412 dead transitions. [2024-06-27 17:58:55,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 412 transitions, 5999 flow [2024-06-27 17:58:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:58:55,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 17:58:55,067 INFO L175 Difference]: Start difference. First operand has 334 places, 369 transitions, 4602 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:58:55,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 412 transitions, 5999 flow [2024-06-27 17:58:57,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 412 transitions, 5931 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:57,071 INFO L231 Difference]: Finished difference. Result has 338 places, 372 transitions, 4822 flow [2024-06-27 17:58:57,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4822, PETRI_PLACES=338, PETRI_TRANSITIONS=372} [2024-06-27 17:58:57,071 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 289 predicate places. [2024-06-27 17:58:57,071 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 372 transitions, 4822 flow [2024-06-27 17:58:57,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:57,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:57,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:57,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 17:58:57,071 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:57,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:57,072 INFO L85 PathProgramCache]: Analyzing trace with hash 757149363, now seen corresponding path program 15 times [2024-06-27 17:58:57,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:57,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912613234] [2024-06-27 17:58:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:57,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:57,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:57,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912613234] [2024-06-27 17:58:57,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912613234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:57,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:57,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:57,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366216184] [2024-06-27 17:58:57,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:57,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:57,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:57,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:57,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:58:57,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 372 transitions, 4822 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:57,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:57,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:58:57,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:58,554 INFO L124 PetriNetUnfolderBase]: 5234/8953 cut-off events. [2024-06-27 17:58:58,554 INFO L125 PetriNetUnfolderBase]: For 431745/431803 co-relation queries the response was YES. [2024-06-27 17:58:58,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53324 conditions, 8953 events. 5234/8953 cut-off events. For 431745/431803 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 69534 event pairs, 1588 based on Foata normal form. 64/8963 useless extension candidates. Maximal degree in co-relation 53176. Up to 7468 conditions per place. [2024-06-27 17:58:58,674 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 308 selfloop transitions, 85 changer transitions 0/408 dead transitions. [2024-06-27 17:58:58,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 408 transitions, 5950 flow [2024-06-27 17:58:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:58:58,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 17:58:58,675 INFO L175 Difference]: Start difference. First operand has 338 places, 372 transitions, 4822 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:58:58,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 408 transitions, 5950 flow [2024-06-27 17:59:00,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 408 transitions, 5845 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 17:59:00,792 INFO L231 Difference]: Finished difference. Result has 343 places, 373 transitions, 4917 flow [2024-06-27 17:59:00,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4717, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4917, PETRI_PLACES=343, PETRI_TRANSITIONS=373} [2024-06-27 17:59:00,792 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 294 predicate places. [2024-06-27 17:59:00,793 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 373 transitions, 4917 flow [2024-06-27 17:59:00,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:00,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:00,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:00,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 17:59:00,793 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:00,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash -863080781, now seen corresponding path program 16 times [2024-06-27 17:59:00,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:00,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498400979] [2024-06-27 17:59:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:00,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:00,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:00,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498400979] [2024-06-27 17:59:00,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498400979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:00,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:00,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:00,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788174500] [2024-06-27 17:59:00,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:00,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:00,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:00,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:00,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:00,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:00,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 373 transitions, 4917 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:00,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:00,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:00,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:02,227 INFO L124 PetriNetUnfolderBase]: 5298/9076 cut-off events. [2024-06-27 17:59:02,228 INFO L125 PetriNetUnfolderBase]: For 450694/450752 co-relation queries the response was YES. [2024-06-27 17:59:02,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54408 conditions, 9076 events. 5298/9076 cut-off events. For 450694/450752 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 70649 event pairs, 1620 based on Foata normal form. 66/9088 useless extension candidates. Maximal degree in co-relation 54258. Up to 7658 conditions per place. [2024-06-27 17:59:02,339 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 307 selfloop transitions, 83 changer transitions 0/405 dead transitions. [2024-06-27 17:59:02,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 405 transitions, 5839 flow [2024-06-27 17:59:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 17:59:02,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:59:02,340 INFO L175 Difference]: Start difference. First operand has 343 places, 373 transitions, 4917 flow. Second operand 8 states and 224 transitions. [2024-06-27 17:59:02,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 405 transitions, 5839 flow [2024-06-27 17:59:03,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 405 transitions, 5635 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:03,903 INFO L231 Difference]: Finished difference. Result has 345 places, 374 transitions, 4914 flow [2024-06-27 17:59:03,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4914, PETRI_PLACES=345, PETRI_TRANSITIONS=374} [2024-06-27 17:59:03,904 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 296 predicate places. [2024-06-27 17:59:03,904 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 374 transitions, 4914 flow [2024-06-27 17:59:03,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:03,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:03,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:03,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 17:59:03,905 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:03,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:03,905 INFO L85 PathProgramCache]: Analyzing trace with hash -593837411, now seen corresponding path program 17 times [2024-06-27 17:59:03,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:03,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251512338] [2024-06-27 17:59:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:03,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:03,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:03,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251512338] [2024-06-27 17:59:03,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251512338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:03,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:03,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:03,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599577311] [2024-06-27 17:59:03,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:03,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:03,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:03,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:03,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:04,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:04,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 374 transitions, 4914 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:04,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:04,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:04,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:05,524 INFO L124 PetriNetUnfolderBase]: 5280/8904 cut-off events. [2024-06-27 17:59:05,524 INFO L125 PetriNetUnfolderBase]: For 419013/419077 co-relation queries the response was YES. [2024-06-27 17:59:05,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53172 conditions, 8904 events. 5280/8904 cut-off events. For 419013/419077 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 68289 event pairs, 1605 based on Foata normal form. 72/8935 useless extension candidates. Maximal degree in co-relation 53021. Up to 7815 conditions per place. [2024-06-27 17:59:05,618 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 364 selfloop transitions, 26 changer transitions 0/405 dead transitions. [2024-06-27 17:59:05,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 405 transitions, 5808 flow [2024-06-27 17:59:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-27 17:59:05,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 17:59:05,618 INFO L175 Difference]: Start difference. First operand has 345 places, 374 transitions, 4914 flow. Second operand 8 states and 219 transitions. [2024-06-27 17:59:05,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 405 transitions, 5808 flow [2024-06-27 17:59:07,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 405 transitions, 5623 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:07,302 INFO L231 Difference]: Finished difference. Result has 347 places, 374 transitions, 4786 flow [2024-06-27 17:59:07,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4729, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4786, PETRI_PLACES=347, PETRI_TRANSITIONS=374} [2024-06-27 17:59:07,303 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 298 predicate places. [2024-06-27 17:59:07,303 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 374 transitions, 4786 flow [2024-06-27 17:59:07,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:07,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:07,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:07,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 17:59:07,303 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:07,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:07,303 INFO L85 PathProgramCache]: Analyzing trace with hash -455012591, now seen corresponding path program 18 times [2024-06-27 17:59:07,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:07,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810336119] [2024-06-27 17:59:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:07,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:07,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:07,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810336119] [2024-06-27 17:59:07,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810336119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:07,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:07,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:07,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139347774] [2024-06-27 17:59:07,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:07,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:07,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:07,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:07,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:07,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:07,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 374 transitions, 4786 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:07,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:07,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:07,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:08,812 INFO L124 PetriNetUnfolderBase]: 5262/8918 cut-off events. [2024-06-27 17:59:08,812 INFO L125 PetriNetUnfolderBase]: For 388141/388162 co-relation queries the response was YES. [2024-06-27 17:59:08,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51923 conditions, 8918 events. 5262/8918 cut-off events. For 388141/388162 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 68846 event pairs, 2246 based on Foata normal form. 29/8878 useless extension candidates. Maximal degree in co-relation 51771. Up to 7621 conditions per place. [2024-06-27 17:59:08,926 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 369 selfloop transitions, 28 changer transitions 0/412 dead transitions. [2024-06-27 17:59:08,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 412 transitions, 5744 flow [2024-06-27 17:59:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:59:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:59:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-27 17:59:08,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074074074074074 [2024-06-27 17:59:08,927 INFO L175 Difference]: Start difference. First operand has 347 places, 374 transitions, 4786 flow. Second operand 9 states and 246 transitions. [2024-06-27 17:59:08,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 412 transitions, 5744 flow [2024-06-27 17:59:10,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 412 transitions, 5676 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:10,642 INFO L231 Difference]: Finished difference. Result has 349 places, 374 transitions, 4778 flow [2024-06-27 17:59:10,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4718, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4778, PETRI_PLACES=349, PETRI_TRANSITIONS=374} [2024-06-27 17:59:10,642 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 300 predicate places. [2024-06-27 17:59:10,642 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 374 transitions, 4778 flow [2024-06-27 17:59:10,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:10,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:10,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:10,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 17:59:10,642 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:10,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash 58003533, now seen corresponding path program 19 times [2024-06-27 17:59:10,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:10,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205824827] [2024-06-27 17:59:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:10,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:10,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:10,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205824827] [2024-06-27 17:59:10,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205824827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:10,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:10,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548297752] [2024-06-27 17:59:10,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:10,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:10,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 374 transitions, 4778 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:10,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:10,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:10,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:12,205 INFO L124 PetriNetUnfolderBase]: 5326/8886 cut-off events. [2024-06-27 17:59:12,205 INFO L125 PetriNetUnfolderBase]: For 396372/396434 co-relation queries the response was YES. [2024-06-27 17:59:12,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52405 conditions, 8886 events. 5326/8886 cut-off events. For 396372/396434 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 67882 event pairs, 1628 based on Foata normal form. 70/8911 useless extension candidates. Maximal degree in co-relation 52252. Up to 7788 conditions per place. [2024-06-27 17:59:12,323 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 352 selfloop transitions, 48 changer transitions 0/415 dead transitions. [2024-06-27 17:59:12,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 415 transitions, 5742 flow [2024-06-27 17:59:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 17:59:12,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793650793650794 [2024-06-27 17:59:12,324 INFO L175 Difference]: Start difference. First operand has 349 places, 374 transitions, 4778 flow. Second operand 7 states and 214 transitions. [2024-06-27 17:59:12,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 415 transitions, 5742 flow [2024-06-27 17:59:14,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 415 transitions, 5681 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:14,158 INFO L231 Difference]: Finished difference. Result has 349 places, 375 transitions, 4852 flow [2024-06-27 17:59:14,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4717, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4852, PETRI_PLACES=349, PETRI_TRANSITIONS=375} [2024-06-27 17:59:14,159 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 300 predicate places. [2024-06-27 17:59:14,159 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 375 transitions, 4852 flow [2024-06-27 17:59:14,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:14,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:14,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:14,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 17:59:14,159 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:14,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:14,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2125674419, now seen corresponding path program 20 times [2024-06-27 17:59:14,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:14,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431823020] [2024-06-27 17:59:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:14,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:14,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:14,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431823020] [2024-06-27 17:59:14,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431823020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:14,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:14,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:14,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749420562] [2024-06-27 17:59:14,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:14,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:14,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:14,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:14,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:14,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:14,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 375 transitions, 4852 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:14,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:14,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:14,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:15,873 INFO L124 PetriNetUnfolderBase]: 5390/9004 cut-off events. [2024-06-27 17:59:15,873 INFO L125 PetriNetUnfolderBase]: For 406185/406247 co-relation queries the response was YES. [2024-06-27 17:59:15,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53228 conditions, 9004 events. 5390/9004 cut-off events. For 406185/406247 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 68969 event pairs, 1645 based on Foata normal form. 70/9026 useless extension candidates. Maximal degree in co-relation 53074. Up to 7884 conditions per place. [2024-06-27 17:59:15,967 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 359 selfloop transitions, 48 changer transitions 0/422 dead transitions. [2024-06-27 17:59:15,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 422 transitions, 5845 flow [2024-06-27 17:59:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-06-27 17:59:15,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-06-27 17:59:15,968 INFO L175 Difference]: Start difference. First operand has 349 places, 375 transitions, 4852 flow. Second operand 8 states and 242 transitions. [2024-06-27 17:59:15,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 422 transitions, 5845 flow [2024-06-27 17:59:18,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 422 transitions, 5744 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:18,180 INFO L231 Difference]: Finished difference. Result has 352 places, 376 transitions, 4885 flow [2024-06-27 17:59:18,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4751, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4885, PETRI_PLACES=352, PETRI_TRANSITIONS=376} [2024-06-27 17:59:18,181 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 303 predicate places. [2024-06-27 17:59:18,181 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 376 transitions, 4885 flow [2024-06-27 17:59:18,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:18,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:18,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:18,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 17:59:18,181 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:18,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:18,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2117103539, now seen corresponding path program 21 times [2024-06-27 17:59:18,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:18,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932417595] [2024-06-27 17:59:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:18,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:18,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:18,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932417595] [2024-06-27 17:59:18,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932417595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:18,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:18,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:18,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999050878] [2024-06-27 17:59:18,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:18,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:18,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:18,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:18,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:18,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 376 transitions, 4885 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:18,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:18,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:18,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:19,766 INFO L124 PetriNetUnfolderBase]: 5477/9163 cut-off events. [2024-06-27 17:59:19,767 INFO L125 PetriNetUnfolderBase]: For 402500/402564 co-relation queries the response was YES. [2024-06-27 17:59:19,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53786 conditions, 9163 events. 5477/9163 cut-off events. For 402500/402564 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 70370 event pairs, 1440 based on Foata normal form. 72/9192 useless extension candidates. Maximal degree in co-relation 53631. Up to 7659 conditions per place. [2024-06-27 17:59:19,885 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 350 selfloop transitions, 63 changer transitions 0/428 dead transitions. [2024-06-27 17:59:19,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 428 transitions, 5943 flow [2024-06-27 17:59:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-06-27 17:59:19,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-06-27 17:59:19,886 INFO L175 Difference]: Start difference. First operand has 352 places, 376 transitions, 4885 flow. Second operand 8 states and 245 transitions. [2024-06-27 17:59:19,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 428 transitions, 5943 flow [2024-06-27 17:59:22,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 428 transitions, 5838 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:22,256 INFO L231 Difference]: Finished difference. Result has 354 places, 378 transitions, 4983 flow [2024-06-27 17:59:22,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4983, PETRI_PLACES=354, PETRI_TRANSITIONS=378} [2024-06-27 17:59:22,256 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 305 predicate places. [2024-06-27 17:59:22,256 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 378 transitions, 4983 flow [2024-06-27 17:59:22,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:22,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:22,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:22,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 17:59:22,257 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:22,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -780663599, now seen corresponding path program 22 times [2024-06-27 17:59:22,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:22,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278503101] [2024-06-27 17:59:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:22,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:22,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:22,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278503101] [2024-06-27 17:59:22,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278503101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:22,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:22,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:22,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741026128] [2024-06-27 17:59:22,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:22,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:22,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:22,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:22,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 378 transitions, 4983 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:22,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:22,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:22,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:23,820 INFO L124 PetriNetUnfolderBase]: 5518/9212 cut-off events. [2024-06-27 17:59:23,820 INFO L125 PetriNetUnfolderBase]: For 400807/400867 co-relation queries the response was YES. [2024-06-27 17:59:23,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54345 conditions, 9212 events. 5518/9212 cut-off events. For 400807/400867 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 70909 event pairs, 1514 based on Foata normal form. 68/9229 useless extension candidates. Maximal degree in co-relation 54189. Up to 7913 conditions per place. [2024-06-27 17:59:23,938 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 296 selfloop transitions, 99 changer transitions 0/410 dead transitions. [2024-06-27 17:59:23,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 410 transitions, 5914 flow [2024-06-27 17:59:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 17:59:23,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-27 17:59:23,940 INFO L175 Difference]: Start difference. First operand has 354 places, 378 transitions, 4983 flow. Second operand 7 states and 204 transitions. [2024-06-27 17:59:23,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 410 transitions, 5914 flow [2024-06-27 17:59:26,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 410 transitions, 5807 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:26,337 INFO L231 Difference]: Finished difference. Result has 355 places, 379 transitions, 5108 flow [2024-06-27 17:59:26,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5108, PETRI_PLACES=355, PETRI_TRANSITIONS=379} [2024-06-27 17:59:26,337 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 306 predicate places. [2024-06-27 17:59:26,337 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 379 transitions, 5108 flow [2024-06-27 17:59:26,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:26,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:26,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:26,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 17:59:26,338 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:26,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:26,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1806123823, now seen corresponding path program 23 times [2024-06-27 17:59:26,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:26,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835076462] [2024-06-27 17:59:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:26,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:26,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835076462] [2024-06-27 17:59:26,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835076462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:26,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:26,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:26,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045338788] [2024-06-27 17:59:26,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:26,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:26,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:26,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 379 transitions, 5108 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:26,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:26,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:26,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:28,128 INFO L124 PetriNetUnfolderBase]: 5760/9927 cut-off events. [2024-06-27 17:59:28,128 INFO L125 PetriNetUnfolderBase]: For 530719/530779 co-relation queries the response was YES. [2024-06-27 17:59:28,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56822 conditions, 9927 events. 5760/9927 cut-off events. For 530719/530779 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 78341 event pairs, 1758 based on Foata normal form. 94/9978 useless extension candidates. Maximal degree in co-relation 56666. Up to 7631 conditions per place. [2024-06-27 17:59:28,235 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 307 selfloop transitions, 106 changer transitions 0/428 dead transitions. [2024-06-27 17:59:28,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 428 transitions, 6136 flow [2024-06-27 17:59:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:59:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:59:28,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2024-06-27 17:59:28,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6567901234567901 [2024-06-27 17:59:28,236 INFO L175 Difference]: Start difference. First operand has 355 places, 379 transitions, 5108 flow. Second operand 9 states and 266 transitions. [2024-06-27 17:59:28,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 428 transitions, 6136 flow [2024-06-27 17:59:30,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 428 transitions, 5925 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:30,243 INFO L231 Difference]: Finished difference. Result has 359 places, 380 transitions, 5153 flow [2024-06-27 17:59:30,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4897, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5153, PETRI_PLACES=359, PETRI_TRANSITIONS=380} [2024-06-27 17:59:30,244 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 310 predicate places. [2024-06-27 17:59:30,244 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 380 transitions, 5153 flow [2024-06-27 17:59:30,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:30,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:30,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:30,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 17:59:30,244 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:30,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1606822033, now seen corresponding path program 24 times [2024-06-27 17:59:30,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:30,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677324707] [2024-06-27 17:59:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:30,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:30,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677324707] [2024-06-27 17:59:30,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677324707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:30,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:30,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:30,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787707995] [2024-06-27 17:59:30,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:30,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:30,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:30,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:30,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:30,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:30,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 380 transitions, 5153 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:30,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:30,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:30,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:31,923 INFO L124 PetriNetUnfolderBase]: 5979/9992 cut-off events. [2024-06-27 17:59:31,924 INFO L125 PetriNetUnfolderBase]: For 531258/531320 co-relation queries the response was YES. [2024-06-27 17:59:32,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58177 conditions, 9992 events. 5979/9992 cut-off events. For 531258/531320 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 77998 event pairs, 1677 based on Foata normal form. 96/10049 useless extension candidates. Maximal degree in co-relation 58020. Up to 7976 conditions per place. [2024-06-27 17:59:32,048 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 303 selfloop transitions, 111 changer transitions 0/429 dead transitions. [2024-06-27 17:59:32,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 429 transitions, 6185 flow [2024-06-27 17:59:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:59:32,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:59:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 287 transitions. [2024-06-27 17:59:32,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6377777777777778 [2024-06-27 17:59:32,049 INFO L175 Difference]: Start difference. First operand has 359 places, 380 transitions, 5153 flow. Second operand 10 states and 287 transitions. [2024-06-27 17:59:32,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 429 transitions, 6185 flow [2024-06-27 17:59:34,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 429 transitions, 5967 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:34,590 INFO L231 Difference]: Finished difference. Result has 362 places, 381 transitions, 5203 flow [2024-06-27 17:59:34,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4937, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5203, PETRI_PLACES=362, PETRI_TRANSITIONS=381} [2024-06-27 17:59:34,591 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 313 predicate places. [2024-06-27 17:59:34,591 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 381 transitions, 5203 flow [2024-06-27 17:59:34,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:34,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:34,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:34,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 17:59:34,592 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:34,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1806271693, now seen corresponding path program 25 times [2024-06-27 17:59:34,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:34,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758597359] [2024-06-27 17:59:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:34,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:34,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758597359] [2024-06-27 17:59:34,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758597359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:34,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:34,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:34,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982906158] [2024-06-27 17:59:34,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:34,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:34,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:34,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:34,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:34,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:34,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 381 transitions, 5203 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:34,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:34,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:34,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:37,066 INFO L124 PetriNetUnfolderBase]: 6355/10624 cut-off events. [2024-06-27 17:59:37,067 INFO L125 PetriNetUnfolderBase]: For 610880/610942 co-relation queries the response was YES. [2024-06-27 17:59:37,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62869 conditions, 10624 events. 6355/10624 cut-off events. For 610880/610942 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 83973 event pairs, 1656 based on Foata normal form. 92/10673 useless extension candidates. Maximal degree in co-relation 62711. Up to 6407 conditions per place. [2024-06-27 17:59:37,180 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 308 selfloop transitions, 116 changer transitions 0/439 dead transitions. [2024-06-27 17:59:37,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 439 transitions, 6493 flow [2024-06-27 17:59:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:59:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:59:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 275 transitions. [2024-06-27 17:59:37,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6790123456790124 [2024-06-27 17:59:37,181 INFO L175 Difference]: Start difference. First operand has 362 places, 381 transitions, 5203 flow. Second operand 9 states and 275 transitions. [2024-06-27 17:59:37,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 439 transitions, 6493 flow [2024-06-27 17:59:39,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 439 transitions, 6247 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 17:59:39,860 INFO L231 Difference]: Finished difference. Result has 361 places, 381 transitions, 5199 flow [2024-06-27 17:59:39,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4959, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5199, PETRI_PLACES=361, PETRI_TRANSITIONS=381} [2024-06-27 17:59:39,861 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 312 predicate places. [2024-06-27 17:59:39,861 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 381 transitions, 5199 flow [2024-06-27 17:59:39,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:39,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:39,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:39,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 17:59:39,861 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:39,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash -754052399, now seen corresponding path program 26 times [2024-06-27 17:59:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:39,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477916223] [2024-06-27 17:59:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:39,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477916223] [2024-06-27 17:59:39,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477916223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:39,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:39,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:39,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867336197] [2024-06-27 17:59:39,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:39,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:39,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:39,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:39,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 381 transitions, 5199 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:39,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:39,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:39,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:42,077 INFO L124 PetriNetUnfolderBase]: 6342/10755 cut-off events. [2024-06-27 17:59:42,077 INFO L125 PetriNetUnfolderBase]: For 471874/471928 co-relation queries the response was YES. [2024-06-27 17:59:42,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62284 conditions, 10755 events. 6342/10755 cut-off events. For 471874/471928 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 85689 event pairs, 2111 based on Foata normal form. 60/10742 useless extension candidates. Maximal degree in co-relation 62127. Up to 9051 conditions per place. [2024-06-27 17:59:42,194 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 299 selfloop transitions, 104 changer transitions 0/418 dead transitions. [2024-06-27 17:59:42,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 418 transitions, 6145 flow [2024-06-27 17:59:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 17:59:42,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:59:42,195 INFO L175 Difference]: Start difference. First operand has 361 places, 381 transitions, 5199 flow. Second operand 7 states and 210 transitions. [2024-06-27 17:59:42,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 418 transitions, 6145 flow [2024-06-27 17:59:45,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 418 transitions, 5831 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 17:59:45,017 INFO L231 Difference]: Finished difference. Result has 359 places, 381 transitions, 5097 flow [2024-06-27 17:59:45,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4885, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5097, PETRI_PLACES=359, PETRI_TRANSITIONS=381} [2024-06-27 17:59:45,017 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 310 predicate places. [2024-06-27 17:59:45,017 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 381 transitions, 5097 flow [2024-06-27 17:59:45,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:45,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:45,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:45,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 17:59:45,018 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:45,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash -531452557, now seen corresponding path program 27 times [2024-06-27 17:59:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:45,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485413999] [2024-06-27 17:59:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:45,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:45,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485413999] [2024-06-27 17:59:45,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485413999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:45,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:45,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:45,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485604363] [2024-06-27 17:59:45,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:45,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:45,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:45,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 381 transitions, 5097 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:45,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:45,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:45,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:47,251 INFO L124 PetriNetUnfolderBase]: 6388/10684 cut-off events. [2024-06-27 17:59:47,251 INFO L125 PetriNetUnfolderBase]: For 467359/467413 co-relation queries the response was YES. [2024-06-27 17:59:47,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61917 conditions, 10684 events. 6388/10684 cut-off events. For 467359/467413 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 84647 event pairs, 1663 based on Foata normal form. 60/10675 useless extension candidates. Maximal degree in co-relation 61761. Up to 5783 conditions per place. [2024-06-27 17:59:47,365 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 288 selfloop transitions, 124 changer transitions 0/427 dead transitions. [2024-06-27 17:59:47,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 427 transitions, 6544 flow [2024-06-27 17:59:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-27 17:59:47,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 17:59:47,365 INFO L175 Difference]: Start difference. First operand has 359 places, 381 transitions, 5097 flow. Second operand 7 states and 217 transitions. [2024-06-27 17:59:47,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 427 transitions, 6544 flow [2024-06-27 17:59:50,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 427 transitions, 6266 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:50,384 INFO L231 Difference]: Finished difference. Result has 359 places, 382 transitions, 5096 flow [2024-06-27 17:59:50,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4819, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5096, PETRI_PLACES=359, PETRI_TRANSITIONS=382} [2024-06-27 17:59:50,384 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 310 predicate places. [2024-06-27 17:59:50,384 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 382 transitions, 5096 flow [2024-06-27 17:59:50,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:50,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:50,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:50,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 17:59:50,384 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:50,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash -514698479, now seen corresponding path program 28 times [2024-06-27 17:59:50,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:50,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119762539] [2024-06-27 17:59:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:50,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:50,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119762539] [2024-06-27 17:59:50,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119762539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:50,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:50,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:50,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558779090] [2024-06-27 17:59:50,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:50,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:50,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:50,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 382 transitions, 5096 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:50,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:50,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:50,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:52,683 INFO L124 PetriNetUnfolderBase]: 6375/10609 cut-off events. [2024-06-27 17:59:52,683 INFO L125 PetriNetUnfolderBase]: For 443696/443760 co-relation queries the response was YES. [2024-06-27 17:59:52,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61111 conditions, 10609 events. 6375/10609 cut-off events. For 443696/443760 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 83555 event pairs, 1873 based on Foata normal form. 70/10636 useless extension candidates. Maximal degree in co-relation 60955. Up to 9388 conditions per place. [2024-06-27 17:59:52,790 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 381 selfloop transitions, 23 changer transitions 0/419 dead transitions. [2024-06-27 17:59:52,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 419 transitions, 6054 flow [2024-06-27 17:59:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:59:52,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 17:59:52,791 INFO L175 Difference]: Start difference. First operand has 359 places, 382 transitions, 5096 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:59:52,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 419 transitions, 6054 flow [2024-06-27 17:59:55,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 419 transitions, 5628 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:55,107 INFO L231 Difference]: Finished difference. Result has 359 places, 382 transitions, 4720 flow [2024-06-27 17:59:55,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4720, PETRI_PLACES=359, PETRI_TRANSITIONS=382} [2024-06-27 17:59:55,107 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 310 predicate places. [2024-06-27 17:59:55,107 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 382 transitions, 4720 flow [2024-06-27 17:59:55,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:55,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:55,107 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] [2024-06-27 17:59:55,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 17:59:55,108 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:55,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:55,108 INFO L85 PathProgramCache]: Analyzing trace with hash 65628045, now seen corresponding path program 2 times [2024-06-27 17:59:55,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:55,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749290204] [2024-06-27 17:59:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:55,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:55,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749290204] [2024-06-27 17:59:55,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749290204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:55,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:55,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:55,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057552525] [2024-06-27 17:59:55,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:55,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:55,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:55,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:55,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 382 transitions, 4720 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:55,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:55,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:55,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:57,330 INFO L124 PetriNetUnfolderBase]: 6192/10428 cut-off events. [2024-06-27 17:59:57,330 INFO L125 PetriNetUnfolderBase]: For 311075/311134 co-relation queries the response was YES. [2024-06-27 17:59:57,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55571 conditions, 10428 events. 6192/10428 cut-off events. For 311075/311134 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 82557 event pairs, 2069 based on Foata normal form. 65/10437 useless extension candidates. Maximal degree in co-relation 55415. Up to 8966 conditions per place. [2024-06-27 17:59:57,433 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 357 selfloop transitions, 53 changer transitions 0/425 dead transitions. [2024-06-27 17:59:57,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 425 transitions, 5756 flow [2024-06-27 17:59:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:59:57,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 17:59:57,434 INFO L175 Difference]: Start difference. First operand has 359 places, 382 transitions, 4720 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:59:57,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 425 transitions, 5756 flow [2024-06-27 17:59:58,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 425 transitions, 5552 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 17:59:58,894 INFO L231 Difference]: Finished difference. Result has 358 places, 385 transitions, 4709 flow [2024-06-27 17:59:58,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4516, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4709, PETRI_PLACES=358, PETRI_TRANSITIONS=385} [2024-06-27 17:59:58,895 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 309 predicate places. [2024-06-27 17:59:58,895 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 385 transitions, 4709 flow [2024-06-27 17:59:58,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:58,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:58,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:58,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 17:59:58,896 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:58,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 908418957, now seen corresponding path program 3 times [2024-06-27 17:59:58,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:58,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257306944] [2024-06-27 17:59:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:59,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:59,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257306944] [2024-06-27 17:59:59,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257306944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:59,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:59,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:59,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295657206] [2024-06-27 17:59:59,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:59,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:59,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:59,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:59,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:59:59,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 385 transitions, 4709 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:59,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:59,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:59:59,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:00,913 INFO L124 PetriNetUnfolderBase]: 6297/10682 cut-off events. [2024-06-27 18:00:00,913 INFO L125 PetriNetUnfolderBase]: For 349175/349235 co-relation queries the response was YES. [2024-06-27 18:00:00,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56927 conditions, 10682 events. 6297/10682 cut-off events. For 349175/349235 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 85471 event pairs, 1854 based on Foata normal form. 66/10701 useless extension candidates. Maximal degree in co-relation 56772. Up to 8652 conditions per place. [2024-06-27 18:00:01,027 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 357 selfloop transitions, 67 changer transitions 0/439 dead transitions. [2024-06-27 18:00:01,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 439 transitions, 6033 flow [2024-06-27 18:00:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-06-27 18:00:01,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-06-27 18:00:01,028 INFO L175 Difference]: Start difference. First operand has 358 places, 385 transitions, 4709 flow. Second operand 8 states and 245 transitions. [2024-06-27 18:00:01,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 439 transitions, 6033 flow [2024-06-27 18:00:05,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 439 transitions, 5960 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 18:00:05,167 INFO L231 Difference]: Finished difference. Result has 364 places, 388 transitions, 4846 flow [2024-06-27 18:00:05,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4846, PETRI_PLACES=364, PETRI_TRANSITIONS=388} [2024-06-27 18:00:05,168 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 315 predicate places. [2024-06-27 18:00:05,168 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 388 transitions, 4846 flow [2024-06-27 18:00:05,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:05,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:05,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:05,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 18:00:05,168 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:05,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:05,169 INFO L85 PathProgramCache]: Analyzing trace with hash 915085197, now seen corresponding path program 4 times [2024-06-27 18:00:05,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:05,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506492685] [2024-06-27 18:00:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:05,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:05,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:05,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506492685] [2024-06-27 18:00:05,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506492685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:05,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:05,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:05,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593940706] [2024-06-27 18:00:05,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:05,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:05,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:05,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:05,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:05,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:00:05,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 388 transitions, 4846 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:05,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:05,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:00:05,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:08,129 INFO L124 PetriNetUnfolderBase]: 6284/10647 cut-off events. [2024-06-27 18:00:08,129 INFO L125 PetriNetUnfolderBase]: For 325385/325445 co-relation queries the response was YES. [2024-06-27 18:00:08,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56729 conditions, 10647 events. 6284/10647 cut-off events. For 325385/325445 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 84955 event pairs, 1880 based on Foata normal form. 66/10666 useless extension candidates. Maximal degree in co-relation 56571. Up to 8646 conditions per place. [2024-06-27 18:00:08,288 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 354 selfloop transitions, 66 changer transitions 0/435 dead transitions. [2024-06-27 18:00:08,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 435 transitions, 5907 flow [2024-06-27 18:00:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 18:00:08,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-27 18:00:08,290 INFO L175 Difference]: Start difference. First operand has 364 places, 388 transitions, 4846 flow. Second operand 8 states and 238 transitions. [2024-06-27 18:00:08,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 435 transitions, 5907 flow [2024-06-27 18:00:10,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 435 transitions, 5751 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 18:00:10,015 INFO L231 Difference]: Finished difference. Result has 367 places, 389 transitions, 4853 flow [2024-06-27 18:00:10,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4700, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4853, PETRI_PLACES=367, PETRI_TRANSITIONS=389} [2024-06-27 18:00:10,016 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 318 predicate places. [2024-06-27 18:00:10,016 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 389 transitions, 4853 flow [2024-06-27 18:00:10,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:10,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:10,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:10,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 18:00:10,016 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:10,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:10,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1599197521, now seen corresponding path program 5 times [2024-06-27 18:00:10,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:10,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295982940] [2024-06-27 18:00:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:10,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:10,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:10,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295982940] [2024-06-27 18:00:10,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295982940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:10,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:10,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:10,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225882211] [2024-06-27 18:00:10,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:10,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:10,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:10,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:10,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:00:10,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 389 transitions, 4853 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:10,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:10,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:00:10,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:13,389 INFO L124 PetriNetUnfolderBase]: 6431/10958 cut-off events. [2024-06-27 18:00:13,389 INFO L125 PetriNetUnfolderBase]: For 421401/421461 co-relation queries the response was YES. [2024-06-27 18:00:13,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57111 conditions, 10958 events. 6431/10958 cut-off events. For 421401/421461 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 87882 event pairs, 1794 based on Foata normal form. 90/11008 useless extension candidates. Maximal degree in co-relation 56952. Up to 6928 conditions per place. [2024-06-27 18:00:13,894 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 307 selfloop transitions, 123 changer transitions 0/445 dead transitions. [2024-06-27 18:00:13,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 445 transitions, 5987 flow [2024-06-27 18:00:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:00:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:00:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-06-27 18:00:13,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2024-06-27 18:00:13,895 INFO L175 Difference]: Start difference. First operand has 367 places, 389 transitions, 4853 flow. Second operand 10 states and 291 transitions. [2024-06-27 18:00:13,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 445 transitions, 5987 flow [2024-06-27 18:00:15,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 445 transitions, 5887 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 18:00:15,679 INFO L231 Difference]: Finished difference. Result has 373 places, 391 transitions, 5090 flow [2024-06-27 18:00:15,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5090, PETRI_PLACES=373, PETRI_TRANSITIONS=391} [2024-06-27 18:00:15,680 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 324 predicate places. [2024-06-27 18:00:15,680 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 391 transitions, 5090 flow [2024-06-27 18:00:15,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:15,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:15,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:15,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 18:00:15,680 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:15,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:15,680 INFO L85 PathProgramCache]: Analyzing trace with hash 441786745, now seen corresponding path program 1 times [2024-06-27 18:00:15,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:15,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765160597] [2024-06-27 18:00:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:15,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:15,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:15,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765160597] [2024-06-27 18:00:15,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765160597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:15,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:15,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:00:15,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733497138] [2024-06-27 18:00:15,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:15,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:00:15,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:00:15,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:00:15,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 45 [2024-06-27 18:00:15,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 391 transitions, 5090 flow. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:15,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:15,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 45 [2024-06-27 18:00:15,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:17,620 INFO L124 PetriNetUnfolderBase]: 3582/7157 cut-off events. [2024-06-27 18:00:17,620 INFO L125 PetriNetUnfolderBase]: For 301079/302917 co-relation queries the response was YES. [2024-06-27 18:00:17,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33613 conditions, 7157 events. 3582/7157 cut-off events. For 301079/302917 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 66941 event pairs, 859 based on Foata normal form. 405/6810 useless extension candidates. Maximal degree in co-relation 33452. Up to 1929 conditions per place. [2024-06-27 18:00:17,717 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 41 selfloop transitions, 108 changer transitions 57/491 dead transitions. [2024-06-27 18:00:17,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 491 transitions, 6746 flow [2024-06-27 18:00:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 18:00:17,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6694444444444444 [2024-06-27 18:00:17,718 INFO L175 Difference]: Start difference. First operand has 373 places, 391 transitions, 5090 flow. Second operand 8 states and 241 transitions. [2024-06-27 18:00:17,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 491 transitions, 6746 flow [2024-06-27 18:00:20,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 491 transitions, 6412 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 18:00:20,973 INFO L231 Difference]: Finished difference. Result has 373 places, 412 transitions, 5302 flow [2024-06-27 18:00:20,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4824, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5302, PETRI_PLACES=373, PETRI_TRANSITIONS=412} [2024-06-27 18:00:20,973 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 324 predicate places. [2024-06-27 18:00:20,973 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 412 transitions, 5302 flow [2024-06-27 18:00:20,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:20,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:20,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:20,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 18:00:20,974 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:20,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:20,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1917438462, now seen corresponding path program 1 times [2024-06-27 18:00:20,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:20,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450761845] [2024-06-27 18:00:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:20,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:21,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:21,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450761845] [2024-06-27 18:00:21,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450761845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:21,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:21,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:21,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500751081] [2024-06-27 18:00:21,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:21,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:21,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:21,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:00:21,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 412 transitions, 5302 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:21,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:21,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:00:21,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:23,409 INFO L124 PetriNetUnfolderBase]: 5234/8790 cut-off events. [2024-06-27 18:00:23,409 INFO L125 PetriNetUnfolderBase]: For 510890/511130 co-relation queries the response was YES. [2024-06-27 18:00:23,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52272 conditions, 8790 events. 5234/8790 cut-off events. For 510890/511130 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 66320 event pairs, 1579 based on Foata normal form. 88/8809 useless extension candidates. Maximal degree in co-relation 52111. Up to 7450 conditions per place. [2024-06-27 18:00:23,508 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 361 selfloop transitions, 30 changer transitions 58/465 dead transitions. [2024-06-27 18:00:23,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 465 transitions, 6655 flow [2024-06-27 18:00:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 18:00:23,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 18:00:23,509 INFO L175 Difference]: Start difference. First operand has 373 places, 412 transitions, 5302 flow. Second operand 8 states and 237 transitions. [2024-06-27 18:00:23,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 465 transitions, 6655 flow [2024-06-27 18:00:26,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 465 transitions, 6355 flow, removed 39 selfloop flow, removed 12 redundant places. [2024-06-27 18:00:26,419 INFO L231 Difference]: Finished difference. Result has 369 places, 359 transitions, 4266 flow [2024-06-27 18:00:26,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4266, PETRI_PLACES=369, PETRI_TRANSITIONS=359} [2024-06-27 18:00:26,419 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 320 predicate places. [2024-06-27 18:00:26,419 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 359 transitions, 4266 flow [2024-06-27 18:00:26,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:26,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:26,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:26,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 18:00:26,420 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:26,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:26,420 INFO L85 PathProgramCache]: Analyzing trace with hash 93166138, now seen corresponding path program 2 times [2024-06-27 18:00:26,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:26,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387790012] [2024-06-27 18:00:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:26,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:26,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:26,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387790012] [2024-06-27 18:00:26,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387790012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:26,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:26,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:26,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207632946] [2024-06-27 18:00:26,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:26,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:26,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:26,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:26,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:26,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:00:26,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 359 transitions, 4266 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:26,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:26,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:00:26,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:28,159 INFO L124 PetriNetUnfolderBase]: 4487/7709 cut-off events. [2024-06-27 18:00:28,159 INFO L125 PetriNetUnfolderBase]: For 525498/525643 co-relation queries the response was YES. [2024-06-27 18:00:28,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46073 conditions, 7709 events. 4487/7709 cut-off events. For 525498/525643 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 58167 event pairs, 1576 based on Foata normal form. 8/7680 useless extension candidates. Maximal degree in co-relation 45913. Up to 6093 conditions per place. [2024-06-27 18:00:28,256 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 359 selfloop transitions, 42 changer transitions 0/417 dead transitions. [2024-06-27 18:00:28,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 417 transitions, 5738 flow [2024-06-27 18:00:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:00:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:00:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-06-27 18:00:28,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6493827160493827 [2024-06-27 18:00:28,257 INFO L175 Difference]: Start difference. First operand has 369 places, 359 transitions, 4266 flow. Second operand 9 states and 263 transitions. [2024-06-27 18:00:28,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 417 transitions, 5738 flow [2024-06-27 18:00:31,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 417 transitions, 5662 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 18:00:31,725 INFO L231 Difference]: Finished difference. Result has 368 places, 361 transitions, 4316 flow [2024-06-27 18:00:31,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4316, PETRI_PLACES=368, PETRI_TRANSITIONS=361} [2024-06-27 18:00:31,725 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 319 predicate places. [2024-06-27 18:00:31,725 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 361 transitions, 4316 flow [2024-06-27 18:00:31,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:31,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:31,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:31,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 18:00:31,726 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:31,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:31,726 INFO L85 PathProgramCache]: Analyzing trace with hash -763254392, now seen corresponding path program 3 times [2024-06-27 18:00:31,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:31,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951720921] [2024-06-27 18:00:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:31,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:31,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:31,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951720921] [2024-06-27 18:00:31,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951720921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:31,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:31,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:31,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713574729] [2024-06-27 18:00:31,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:31,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:31,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:31,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:31,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:31,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:00:31,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 361 transitions, 4316 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:31,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:31,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:00:31,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:33,215 INFO L124 PetriNetUnfolderBase]: 4474/7647 cut-off events. [2024-06-27 18:00:33,216 INFO L125 PetriNetUnfolderBase]: For 500462/500617 co-relation queries the response was YES. [2024-06-27 18:00:33,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45266 conditions, 7647 events. 4474/7647 cut-off events. For 500462/500617 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 57623 event pairs, 1400 based on Foata normal form. 8/7619 useless extension candidates. Maximal degree in co-relation 45108. Up to 6596 conditions per place. [2024-06-27 18:00:33,298 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 348 selfloop transitions, 33 changer transitions 2/399 dead transitions. [2024-06-27 18:00:33,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 399 transitions, 5194 flow [2024-06-27 18:00:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 18:00:33,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-06-27 18:00:33,299 INFO L175 Difference]: Start difference. First operand has 368 places, 361 transitions, 4316 flow. Second operand 8 states and 223 transitions. [2024-06-27 18:00:33,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 399 transitions, 5194 flow [2024-06-27 18:00:36,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 399 transitions, 5105 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 18:00:36,326 INFO L231 Difference]: Finished difference. Result has 370 places, 361 transitions, 4297 flow [2024-06-27 18:00:36,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4227, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4297, PETRI_PLACES=370, PETRI_TRANSITIONS=361} [2024-06-27 18:00:36,327 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 321 predicate places. [2024-06-27 18:00:36,327 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 361 transitions, 4297 flow [2024-06-27 18:00:36,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:36,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:36,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:36,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 18:00:36,327 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:36,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1448644038, now seen corresponding path program 4 times [2024-06-27 18:00:36,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:36,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506184051] [2024-06-27 18:00:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:36,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:36,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:36,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506184051] [2024-06-27 18:00:36,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506184051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:36,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:36,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:36,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817579651] [2024-06-27 18:00:36,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:36,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:36,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:00:36,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 361 transitions, 4297 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:36,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:36,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:00:36,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:38,146 INFO L124 PetriNetUnfolderBase]: 4456/7646 cut-off events. [2024-06-27 18:00:38,146 INFO L125 PetriNetUnfolderBase]: For 475249/475404 co-relation queries the response was YES. [2024-06-27 18:00:38,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44074 conditions, 7646 events. 4456/7646 cut-off events. For 475249/475404 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 57851 event pairs, 1557 based on Foata normal form. 10/7622 useless extension candidates. Maximal degree in co-relation 43915. Up to 6596 conditions per place. [2024-06-27 18:00:38,257 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 355 selfloop transitions, 29 changer transitions 0/400 dead transitions. [2024-06-27 18:00:38,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 400 transitions, 5199 flow [2024-06-27 18:00:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 18:00:38,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 18:00:38,258 INFO L175 Difference]: Start difference. First operand has 370 places, 361 transitions, 4297 flow. Second operand 8 states and 225 transitions. [2024-06-27 18:00:38,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 400 transitions, 5199 flow [2024-06-27 18:00:42,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 400 transitions, 5112 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 18:00:42,488 INFO L231 Difference]: Finished difference. Result has 371 places, 361 transitions, 4273 flow [2024-06-27 18:00:42,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4210, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4273, PETRI_PLACES=371, PETRI_TRANSITIONS=361} [2024-06-27 18:00:42,488 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 322 predicate places. [2024-06-27 18:00:42,489 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 361 transitions, 4273 flow [2024-06-27 18:00:42,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:42,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:42,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:42,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 18:00:42,489 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:42,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1373246694, now seen corresponding path program 5 times [2024-06-27 18:00:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:42,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463187556] [2024-06-27 18:00:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:42,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:42,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463187556] [2024-06-27 18:00:42,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463187556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:42,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:42,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:42,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364466301] [2024-06-27 18:00:42,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:42,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:42,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:42,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:42,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:42,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:00:42,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 361 transitions, 4273 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:42,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:42,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:00:42,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:44,391 INFO L124 PetriNetUnfolderBase]: 4666/8087 cut-off events. [2024-06-27 18:00:44,392 INFO L125 PetriNetUnfolderBase]: For 576142/576300 co-relation queries the response was YES. [2024-06-27 18:00:44,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47739 conditions, 8087 events. 4666/8087 cut-off events. For 576142/576300 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 61990 event pairs, 1301 based on Foata normal form. 10/8063 useless extension candidates. Maximal degree in co-relation 47579. Up to 6458 conditions per place. [2024-06-27 18:00:44,516 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 317 selfloop transitions, 78 changer transitions 0/411 dead transitions. [2024-06-27 18:00:44,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 411 transitions, 5507 flow [2024-06-27 18:00:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 18:00:44,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638888888888889 [2024-06-27 18:00:44,517 INFO L175 Difference]: Start difference. First operand has 371 places, 361 transitions, 4273 flow. Second operand 8 states and 239 transitions. [2024-06-27 18:00:44,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 411 transitions, 5507 flow [2024-06-27 18:00:48,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 411 transitions, 5416 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 18:00:48,685 INFO L231 Difference]: Finished difference. Result has 370 places, 363 transitions, 4376 flow [2024-06-27 18:00:48,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4182, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4376, PETRI_PLACES=370, PETRI_TRANSITIONS=363} [2024-06-27 18:00:48,686 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 321 predicate places. [2024-06-27 18:00:48,686 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 363 transitions, 4376 flow [2024-06-27 18:00:48,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:48,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:48,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:48,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 18:00:48,687 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:48,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:48,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1380865254, now seen corresponding path program 6 times [2024-06-27 18:00:48,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:48,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632649873] [2024-06-27 18:00:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:48,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:48,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:48,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632649873] [2024-06-27 18:00:48,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632649873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:48,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:48,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:48,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940660371] [2024-06-27 18:00:48,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:48,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:48,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:00:48,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 363 transitions, 4376 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:48,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:48,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:00:48,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:50,608 INFO L124 PetriNetUnfolderBase]: 4730/8171 cut-off events. [2024-06-27 18:00:50,608 INFO L125 PetriNetUnfolderBase]: For 588547/588716 co-relation queries the response was YES. [2024-06-27 18:00:50,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48618 conditions, 8171 events. 4730/8171 cut-off events. For 588547/588716 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 62576 event pairs, 1278 based on Foata normal form. 10/8149 useless extension candidates. Maximal degree in co-relation 48458. Up to 6856 conditions per place. [2024-06-27 18:00:50,964 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 311 selfloop transitions, 77 changer transitions 0/404 dead transitions. [2024-06-27 18:00:50,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 404 transitions, 5312 flow [2024-06-27 18:00:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 18:00:50,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 18:00:50,966 INFO L175 Difference]: Start difference. First operand has 370 places, 363 transitions, 4376 flow. Second operand 8 states and 232 transitions. [2024-06-27 18:00:50,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 404 transitions, 5312 flow [2024-06-27 18:00:54,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 404 transitions, 5208 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 18:00:54,413 INFO L231 Difference]: Finished difference. Result has 374 places, 364 transitions, 4451 flow [2024-06-27 18:00:54,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4276, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4451, PETRI_PLACES=374, PETRI_TRANSITIONS=364} [2024-06-27 18:00:54,413 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 325 predicate places. [2024-06-27 18:00:54,414 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 364 transitions, 4451 flow [2024-06-27 18:00:54,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:54,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:54,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:54,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 18:00:54,414 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:54,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1373735402, now seen corresponding path program 7 times [2024-06-27 18:00:54,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:54,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994042438] [2024-06-27 18:00:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:54,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:54,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:54,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994042438] [2024-06-27 18:00:54,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994042438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:54,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:54,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:00:54,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838111318] [2024-06-27 18:00:54,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:54,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:00:54,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:54,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:00:54,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:00:54,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:00:54,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 364 transitions, 4451 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:54,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:54,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:00:54,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:56,178 INFO L124 PetriNetUnfolderBase]: 4712/8173 cut-off events. [2024-06-27 18:00:56,178 INFO L125 PetriNetUnfolderBase]: For 550801/550967 co-relation queries the response was YES. [2024-06-27 18:00:56,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47794 conditions, 8173 events. 4712/8173 cut-off events. For 550801/550967 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 62760 event pairs, 1339 based on Foata normal form. 10/8148 useless extension candidates. Maximal degree in co-relation 47632. Up to 6830 conditions per place. [2024-06-27 18:00:56,259 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 309 selfloop transitions, 76 changer transitions 0/401 dead transitions. [2024-06-27 18:00:56,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 401 transitions, 5367 flow [2024-06-27 18:00:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:00:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:00:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 18:00:56,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 18:00:56,260 INFO L175 Difference]: Start difference. First operand has 374 places, 364 transitions, 4451 flow. Second operand 8 states and 228 transitions. [2024-06-27 18:00:56,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 401 transitions, 5367 flow [2024-06-27 18:01:00,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 401 transitions, 5214 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 18:01:00,711 INFO L231 Difference]: Finished difference. Result has 376 places, 365 transitions, 4473 flow [2024-06-27 18:01:00,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4298, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4473, PETRI_PLACES=376, PETRI_TRANSITIONS=365} [2024-06-27 18:01:00,712 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 327 predicate places. [2024-06-27 18:01:00,712 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 365 transitions, 4473 flow [2024-06-27 18:01:00,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:00,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:00,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:00,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 18:01:00,712 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:00,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1068390536, now seen corresponding path program 8 times [2024-06-27 18:01:00,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:00,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933912288] [2024-06-27 18:01:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:00,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:00,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933912288] [2024-06-27 18:01:00,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933912288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:00,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:00,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:01:00,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719765939] [2024-06-27 18:01:00,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:00,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:01:00,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:00,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:01:00,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:01:00,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:01:00,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 365 transitions, 4473 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:00,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:00,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:01:00,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:02,475 INFO L124 PetriNetUnfolderBase]: 4758/8164 cut-off events. [2024-06-27 18:01:02,475 INFO L125 PetriNetUnfolderBase]: For 560891/561060 co-relation queries the response was YES. [2024-06-27 18:01:02,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48329 conditions, 8164 events. 4758/8164 cut-off events. For 560891/561060 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 62449 event pairs, 1958 based on Foata normal form. 10/8136 useless extension candidates. Maximal degree in co-relation 48166. Up to 7078 conditions per place. [2024-06-27 18:01:02,583 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 346 selfloop transitions, 28 changer transitions 4/394 dead transitions. [2024-06-27 18:01:02,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 394 transitions, 5349 flow [2024-06-27 18:01:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:01:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:01:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-27 18:01:02,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 18:01:02,584 INFO L175 Difference]: Start difference. First operand has 376 places, 365 transitions, 4473 flow. Second operand 8 states and 216 transitions. [2024-06-27 18:01:02,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 394 transitions, 5349 flow [2024-06-27 18:01:06,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 394 transitions, 5196 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:01:06,763 INFO L231 Difference]: Finished difference. Result has 378 places, 366 transitions, 4401 flow [2024-06-27 18:01:06,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4320, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4401, PETRI_PLACES=378, PETRI_TRANSITIONS=366} [2024-06-27 18:01:06,763 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 329 predicate places. [2024-06-27 18:01:06,763 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 366 transitions, 4401 flow [2024-06-27 18:01:06,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:06,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:06,763 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] [2024-06-27 18:01:06,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 18:01:06,763 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:06,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash 50875802, now seen corresponding path program 1 times [2024-06-27 18:01:06,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:06,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779500658] [2024-06-27 18:01:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:06,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:07,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:07,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779500658] [2024-06-27 18:01:07,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779500658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:07,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:07,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:01:07,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578837971] [2024-06-27 18:01:07,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:07,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:01:07,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:01:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:01:07,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:01:07,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 366 transitions, 4401 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:07,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:07,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:01:07,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:08,733 INFO L124 PetriNetUnfolderBase]: 4909/8481 cut-off events. [2024-06-27 18:01:08,733 INFO L125 PetriNetUnfolderBase]: For 631968/632141 co-relation queries the response was YES. [2024-06-27 18:01:08,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50859 conditions, 8481 events. 4909/8481 cut-off events. For 631968/632141 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 65231 event pairs, 1246 based on Foata normal form. 8/8445 useless extension candidates. Maximal degree in co-relation 50695. Up to 6110 conditions per place. [2024-06-27 18:01:08,828 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 313 selfloop transitions, 90 changer transitions 0/419 dead transitions. [2024-06-27 18:01:08,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 419 transitions, 5885 flow [2024-06-27 18:01:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:01:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:01:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 18:01:08,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6694444444444444 [2024-06-27 18:01:08,829 INFO L175 Difference]: Start difference. First operand has 378 places, 366 transitions, 4401 flow. Second operand 8 states and 241 transitions. [2024-06-27 18:01:08,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 419 transitions, 5885 flow [2024-06-27 18:01:13,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 419 transitions, 5814 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 18:01:13,092 INFO L231 Difference]: Finished difference. Result has 379 places, 368 transitions, 4552 flow [2024-06-27 18:01:13,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4552, PETRI_PLACES=379, PETRI_TRANSITIONS=368} [2024-06-27 18:01:13,092 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 330 predicate places. [2024-06-27 18:01:13,092 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 368 transitions, 4552 flow [2024-06-27 18:01:13,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:13,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:13,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:13,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 18:01:13,093 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:13,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:13,093 INFO L85 PathProgramCache]: Analyzing trace with hash 60399002, now seen corresponding path program 2 times [2024-06-27 18:01:13,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:13,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685744413] [2024-06-27 18:01:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:13,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:13,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:13,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685744413] [2024-06-27 18:01:13,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685744413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:13,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:13,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:01:13,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738495043] [2024-06-27 18:01:13,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:13,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:01:13,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:13,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:01:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:01:13,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 18:01:13,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 368 transitions, 4552 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:13,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:13,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 18:01:13,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand