./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-5.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/fib_safe-5.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/fib_safe-5.i ./goblint.2024-06-19_11-23-25.files/protection/fib_safe-5.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 17:47:08,349 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:47:08,430 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:47:08,436 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:47:08,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:47:08,470 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:47:08,471 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:47:08,472 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:47:08,472 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:47:08,476 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:47:08,476 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:47:08,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:47:08,477 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:47:08,479 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:47:08,479 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:47:08,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:47:08,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:47:08,480 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:47:08,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:47:08,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:47:08,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:47:08,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:47:08,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:47:08,481 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:47:08,482 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:47:08,482 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:47:08,482 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:47:08,482 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:47:08,483 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:47:08,483 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:47:08,484 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:47:08,484 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:47:08,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:47:08,485 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:47:08,485 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:47:08,485 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:47:08,485 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:47:08,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:47:08,486 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:47:08,486 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:47:08,486 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:47:08,486 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:47:08,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:47:08,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:47:08,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:47:08,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:47:08,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:47:08,797 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:47:08,797 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:47:08,798 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-5.i [2024-06-27 17:47:09,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:47:10,216 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:47:10,220 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-5.i [2024-06-27 17:47:10,242 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1517f5ce/338c110d8a0341ad88d8c6b3a8291ce7/FLAGff1570c5e [2024-06-27 17:47:10,528 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1517f5ce/338c110d8a0341ad88d8c6b3a8291ce7 [2024-06-27 17:47:10,530 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:47:10,531 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:47:10,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/fib_safe-5.yml/witness.yml [2024-06-27 17:47:10,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:47:10,660 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:47:10,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:47:10,661 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:47:10,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:47:10,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:47:10" (1/2) ... [2024-06-27 17:47:10,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b560432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10, skipping insertion in model container [2024-06-27 17:47:10,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:47:10" (1/2) ... [2024-06-27 17:47:10,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f88e946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10, skipping insertion in model container [2024-06-27 17:47:10,670 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:47:10" (2/2) ... [2024-06-27 17:47:10,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b560432 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:10, skipping insertion in model container [2024-06-27 17:47:10,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:47:10" (2/2) ... [2024-06-27 17:47:10,671 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:47:10,708 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:47:10,709 INFO L97 edCorrectnessWitness]: Location invariant before [L722-L722] (((((((! multithreaded || 0 <= next) && (! multithreaded || 0 <= q)) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 0 <= cur)) && (! multithreaded || 1 <= j)) && (! multithreaded || 1 <= i) [2024-06-27 17:47:10,709 INFO L97 edCorrectnessWitness]: Location invariant before [L721-L721] (((((((! multithreaded || 0 <= next) && (! multithreaded || 0 <= q)) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 0 <= cur)) && (! multithreaded || 1 <= j)) && (! multithreaded || 1 <= i) [2024-06-27 17:47:10,710 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:47:10,710 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-06-27 17:47:10,752 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:47:11,111 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/fib_safe-5.i[30241,30254] [2024-06-27 17:47:11,136 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:47:11,146 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:47:11,204 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/fib_safe-5.i[30241,30254] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:47:11,229 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:47:11,255 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:47:11,255 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11 WrapperNode [2024-06-27 17:47:11,255 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:47:11,256 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:47:11,256 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:47:11,256 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:47:11,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,295 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-06-27 17:47:11,295 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:47:11,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:47:11,299 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:47:11,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:47:11,309 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,313 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,326 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 17:47:11,326 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,326 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,336 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,348 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,359 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:47:11,360 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:47:11,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:47:11,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:47:11,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (1/1) ... [2024-06-27 17:47:11,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:47:11,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:11,410 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 17:47:11,433 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 17:47:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-27 17:47:11,450 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-27 17:47:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-27 17:47:11,450 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-27 17:47:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:47:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:47:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:47:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:47:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:47:11,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:47:11,453 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 17:47:11,597 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:47:11,599 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:47:11,819 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:47:11,819 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:47:11,917 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:47:11,917 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 17:47:11,918 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:47:11 BoogieIcfgContainer [2024-06-27 17:47:11,918 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:47:11,921 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:47:11,921 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:47:11,924 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:47:11,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:47:10" (1/4) ... [2024-06-27 17:47:11,925 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116817bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:47:11, skipping insertion in model container [2024-06-27 17:47:11,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:47:10" (2/4) ... [2024-06-27 17:47:11,926 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116817bf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:47:11, skipping insertion in model container [2024-06-27 17:47:11,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:11" (3/4) ... [2024-06-27 17:47:11,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116817bf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:47:11, skipping insertion in model container [2024-06-27 17:47:11,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:47:11" (4/4) ... [2024-06-27 17:47:11,929 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-5.i [2024-06-27 17:47:11,946 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:47:11,947 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 17:47:11,947 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:47:11,984 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:47:12,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 34 transitions, 76 flow [2024-06-27 17:47:12,053 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-06-27 17:47:12,053 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:47:12,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 4/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-06-27 17:47:12,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 34 transitions, 76 flow [2024-06-27 17:47:12,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 70 flow [2024-06-27 17:47:12,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:47:12,083 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;@598ccf23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:47:12,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 17:47:12,091 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:47:12,091 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-27 17:47:12,091 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:47:12,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:12,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:12,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:12,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:12,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1002670089, now seen corresponding path program 1 times [2024-06-27 17:47:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:12,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110636422] [2024-06-27 17:47:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:12,767 INFO 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 17:47:12,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:12,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110636422] [2024-06-27 17:47:12,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110636422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:12,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:12,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:47:12,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451892726] [2024-06-27 17:47:12,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:12,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:47:12,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:47:12,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:47:12,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:12,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:12,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:12,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:12,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:13,091 INFO L124 PetriNetUnfolderBase]: 354/619 cut-off events. [2024-06-27 17:47:13,091 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 17:47:13,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 619 events. 354/619 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2648 event pairs, 51 based on Foata normal form. 33/585 useless extension candidates. Maximal degree in co-relation 1165. Up to 343 conditions per place. [2024-06-27 17:47:13,098 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 41 selfloop transitions, 11 changer transitions 1/60 dead transitions. [2024-06-27 17:47:13,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 235 flow [2024-06-27 17:47:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:47:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:47:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 17:47:13,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2024-06-27 17:47:13,111 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 70 flow. Second operand 5 states and 106 transitions. [2024-06-27 17:47:13,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 235 flow [2024-06-27 17:47:13,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 60 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:47:13,117 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 142 flow [2024-06-27 17:47:13,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-06-27 17:47:13,122 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-06-27 17:47:13,122 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 142 flow [2024-06-27 17:47:13,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:13,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:13,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:13,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:47:13,123 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:13,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:13,124 INFO L85 PathProgramCache]: Analyzing trace with hash -936565413, now seen corresponding path program 1 times [2024-06-27 17:47:13,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:13,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735920142] [2024-06-27 17:47:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:13,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:13,456 INFO 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 17:47:13,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:13,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735920142] [2024-06-27 17:47:13,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735920142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:13,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:13,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:47:13,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487389243] [2024-06-27 17:47:13,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:13,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:47:13,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:47:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:47:13,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:13,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:13,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:13,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:13,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:13,699 INFO L124 PetriNetUnfolderBase]: 322/569 cut-off events. [2024-06-27 17:47:13,699 INFO L125 PetriNetUnfolderBase]: For 236/236 co-relation queries the response was YES. [2024-06-27 17:47:13,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 569 events. 322/569 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2457 event pairs, 30 based on Foata normal form. 12/565 useless extension candidates. Maximal degree in co-relation 1465. Up to 295 conditions per place. [2024-06-27 17:47:13,709 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 51 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-06-27 17:47:13,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 380 flow [2024-06-27 17:47:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:47:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:47:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 17:47:13,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630252100840336 [2024-06-27 17:47:13,715 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 142 flow. Second operand 7 states and 134 transitions. [2024-06-27 17:47:13,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 380 flow [2024-06-27 17:47:13,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 75 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:47:13,723 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 224 flow [2024-06-27 17:47:13,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=224, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-06-27 17:47:13,724 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2024-06-27 17:47:13,725 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 224 flow [2024-06-27 17:47:13,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:13,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:13,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:13,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:47:13,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:13,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:13,730 INFO L85 PathProgramCache]: Analyzing trace with hash 544161191, now seen corresponding path program 1 times [2024-06-27 17:47:13,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:13,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515126868] [2024-06-27 17:47:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:13,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:14,086 INFO 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 17:47:14,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:14,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515126868] [2024-06-27 17:47:14,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515126868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:14,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:14,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:47:14,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963913719] [2024-06-27 17:47:14,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:14,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:47:14,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:14,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:47:14,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:47:14,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:14,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 224 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:14,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:14,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:14,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:14,324 INFO L124 PetriNetUnfolderBase]: 307/544 cut-off events. [2024-06-27 17:47:14,324 INFO L125 PetriNetUnfolderBase]: For 512/515 co-relation queries the response was YES. [2024-06-27 17:47:14,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1701 conditions, 544 events. 307/544 cut-off events. For 512/515 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2306 event pairs, 20 based on Foata normal form. 11/539 useless extension candidates. Maximal degree in co-relation 1670. Up to 295 conditions per place. [2024-06-27 17:47:14,330 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 54 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-27 17:47:14,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 481 flow [2024-06-27 17:47:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:47:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:47:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 17:47:14,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404411764705882 [2024-06-27 17:47:14,332 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 224 flow. Second operand 8 states and 147 transitions. [2024-06-27 17:47:14,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 481 flow [2024-06-27 17:47:14,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 80 transitions, 449 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 17:47:14,338 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 244 flow [2024-06-27 17:47:14,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 17:47:14,339 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2024-06-27 17:47:14,339 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 244 flow [2024-06-27 17:47:14,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:14,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:14,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:14,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:47:14,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:14,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash 587817960, now seen corresponding path program 1 times [2024-06-27 17:47:14,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:14,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549062651] [2024-06-27 17:47:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:14,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:14,632 INFO 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 17:47:14,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:14,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549062651] [2024-06-27 17:47:14,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549062651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:14,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:14,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:47:14,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404807689] [2024-06-27 17:47:14,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:14,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:47:14,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:14,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:47:14,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:47:14,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:14,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:14,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:14,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:14,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:14,799 INFO L124 PetriNetUnfolderBase]: 373/652 cut-off events. [2024-06-27 17:47:14,800 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-06-27 17:47:14,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2129 conditions, 652 events. 373/652 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2868 event pairs, 62 based on Foata normal form. 21/658 useless extension candidates. Maximal degree in co-relation 2097. Up to 245 conditions per place. [2024-06-27 17:47:14,806 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 51 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2024-06-27 17:47:14,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 79 transitions, 538 flow [2024-06-27 17:47:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:47:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:47:14,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 17:47:14,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2024-06-27 17:47:14,807 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 244 flow. Second operand 7 states and 128 transitions. [2024-06-27 17:47:14,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 79 transitions, 538 flow [2024-06-27 17:47:14,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 494 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:14,812 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 323 flow [2024-06-27 17:47:14,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=323, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-27 17:47:14,813 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 20 predicate places. [2024-06-27 17:47:14,813 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 323 flow [2024-06-27 17:47:14,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:14,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:14,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:14,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:47:14,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:14,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:14,815 INFO L85 PathProgramCache]: Analyzing trace with hash 460670153, now seen corresponding path program 1 times [2024-06-27 17:47:14,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:14,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244519446] [2024-06-27 17:47:14,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:14,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:15,076 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 17:47:15,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:15,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244519446] [2024-06-27 17:47:15,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244519446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:15,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:15,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:47:15,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155606456] [2024-06-27 17:47:15,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:15,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:47:15,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:15,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:47:15,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:47:15,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:15,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 323 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 17:47:15,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:15,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:15,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:15,286 INFO L124 PetriNetUnfolderBase]: 355/621 cut-off events. [2024-06-27 17:47:15,287 INFO L125 PetriNetUnfolderBase]: For 1110/1110 co-relation queries the response was YES. [2024-06-27 17:47:15,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 621 events. 355/621 cut-off events. For 1110/1110 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2683 event pairs, 58 based on Foata normal form. 9/615 useless extension candidates. Maximal degree in co-relation 2170. Up to 242 conditions per place. [2024-06-27 17:47:15,291 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 50 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-06-27 17:47:15,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 567 flow [2024-06-27 17:47:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:47:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:47:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 17:47:15,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2024-06-27 17:47:15,293 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 323 flow. Second operand 8 states and 134 transitions. [2024-06-27 17:47:15,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 567 flow [2024-06-27 17:47:15,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 560 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:47:15,298 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 363 flow [2024-06-27 17:47:15,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-06-27 17:47:15,299 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 27 predicate places. [2024-06-27 17:47:15,299 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 363 flow [2024-06-27 17:47:15,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 17:47:15,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:15,300 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 17:47:15,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:47:15,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:15,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1780842470, now seen corresponding path program 1 times [2024-06-27 17:47:15,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:15,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152631226] [2024-06-27 17:47:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:15,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:15,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:15,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152631226] [2024-06-27 17:47:15,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152631226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:15,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:15,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:47:15,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943842420] [2024-06-27 17:47:15,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:15,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:47:15,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:15,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:47:15,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:47:15,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:15,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 363 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:15,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:15,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:15,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:15,821 INFO L124 PetriNetUnfolderBase]: 367/640 cut-off events. [2024-06-27 17:47:15,821 INFO L125 PetriNetUnfolderBase]: For 1371/1376 co-relation queries the response was YES. [2024-06-27 17:47:15,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2383 conditions, 640 events. 367/640 cut-off events. For 1371/1376 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2765 event pairs, 60 based on Foata normal form. 5/630 useless extension candidates. Maximal degree in co-relation 2341. Up to 232 conditions per place. [2024-06-27 17:47:15,827 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 57 selfloop transitions, 29 changer transitions 0/93 dead transitions. [2024-06-27 17:47:15,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 699 flow [2024-06-27 17:47:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:47:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:47:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 17:47:15,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163398692810458 [2024-06-27 17:47:15,828 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 363 flow. Second operand 9 states and 158 transitions. [2024-06-27 17:47:15,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 699 flow [2024-06-27 17:47:15,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 647 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 17:47:15,834 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 434 flow [2024-06-27 17:47:15,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=434, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-27 17:47:15,835 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 30 predicate places. [2024-06-27 17:47:15,835 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 434 flow [2024-06-27 17:47:15,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:15,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:15,836 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 17:47:15,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:47:15,836 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:15,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash 148751756, now seen corresponding path program 2 times [2024-06-27 17:47:15,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:15,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84670287] [2024-06-27 17:47:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:15,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:16,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:16,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84670287] [2024-06-27 17:47:16,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84670287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:16,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:16,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:47:16,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836541587] [2024-06-27 17:47:16,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:16,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:47:16,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:16,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:47:16,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:47:16,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:16,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 434 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:16,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:16,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:16,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:16,361 INFO L124 PetriNetUnfolderBase]: 385/670 cut-off events. [2024-06-27 17:47:16,361 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-06-27 17:47:16,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2643 conditions, 670 events. 385/670 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2933 event pairs, 61 based on Foata normal form. 4/659 useless extension candidates. Maximal degree in co-relation 2600. Up to 267 conditions per place. [2024-06-27 17:47:16,367 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 57 selfloop transitions, 32 changer transitions 0/96 dead transitions. [2024-06-27 17:47:16,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 807 flow [2024-06-27 17:47:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:47:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:47:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 17:47:16,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-06-27 17:47:16,369 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 434 flow. Second operand 9 states and 152 transitions. [2024-06-27 17:47:16,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 807 flow [2024-06-27 17:47:16,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 736 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:16,378 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 549 flow [2024-06-27 17:47:16,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=549, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-27 17:47:16,380 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 35 predicate places. [2024-06-27 17:47:16,380 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 549 flow [2024-06-27 17:47:16,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:16,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:16,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:16,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:47:16,381 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:16,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash -622892136, now seen corresponding path program 3 times [2024-06-27 17:47:16,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:16,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914206250] [2024-06-27 17:47:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:16,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:16,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:16,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914206250] [2024-06-27 17:47:16,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914206250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:16,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:16,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:47:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043758720] [2024-06-27 17:47:16,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:16,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:47:16,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:16,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:47:16,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:47:16,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:16,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 549 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:16,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:16,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:16,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:16,898 INFO L124 PetriNetUnfolderBase]: 397/688 cut-off events. [2024-06-27 17:47:16,898 INFO L125 PetriNetUnfolderBase]: For 1934/1944 co-relation queries the response was YES. [2024-06-27 17:47:16,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2883 conditions, 688 events. 397/688 cut-off events. For 1934/1944 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3020 event pairs, 60 based on Foata normal form. 9/682 useless extension candidates. Maximal degree in co-relation 2837. Up to 278 conditions per place. [2024-06-27 17:47:16,904 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 63 selfloop transitions, 36 changer transitions 0/106 dead transitions. [2024-06-27 17:47:16,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 922 flow [2024-06-27 17:47:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:47:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:47:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 17:47:16,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032679738562091 [2024-06-27 17:47:16,906 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 549 flow. Second operand 9 states and 154 transitions. [2024-06-27 17:47:16,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 922 flow [2024-06-27 17:47:16,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 882 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:47:16,914 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 670 flow [2024-06-27 17:47:16,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-27 17:47:16,917 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2024-06-27 17:47:16,917 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 670 flow [2024-06-27 17:47:16,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:16,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:16,918 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 17:47:16,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:47:16,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:16,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:16,919 INFO L85 PathProgramCache]: Analyzing trace with hash 149346402, now seen corresponding path program 4 times [2024-06-27 17:47:16,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:16,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287714014] [2024-06-27 17:47:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:16,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:17,167 INFO 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 17:47:17,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:17,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287714014] [2024-06-27 17:47:17,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287714014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:17,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:17,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:47:17,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369043435] [2024-06-27 17:47:17,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:17,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:47:17,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:17,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:47:17,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:47:17,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:17,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 670 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:17,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:17,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:17,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:17,411 INFO L124 PetriNetUnfolderBase]: 409/709 cut-off events. [2024-06-27 17:47:17,411 INFO L125 PetriNetUnfolderBase]: For 2414/2414 co-relation queries the response was YES. [2024-06-27 17:47:17,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3149 conditions, 709 events. 409/709 cut-off events. For 2414/2414 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3140 event pairs, 57 based on Foata normal form. 4/698 useless extension candidates. Maximal degree in co-relation 3098. Up to 294 conditions per place. [2024-06-27 17:47:17,419 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 67 selfloop transitions, 38 changer transitions 0/112 dead transitions. [2024-06-27 17:47:17,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 1062 flow [2024-06-27 17:47:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:47:17,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:47:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 17:47:17,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065359477124183 [2024-06-27 17:47:17,424 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 670 flow. Second operand 9 states and 155 transitions. [2024-06-27 17:47:17,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 1062 flow [2024-06-27 17:47:17,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 112 transitions, 1003 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:47:17,440 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 771 flow [2024-06-27 17:47:17,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=771, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2024-06-27 17:47:17,441 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2024-06-27 17:47:17,442 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 771 flow [2024-06-27 17:47:17,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:17,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:17,452 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 17:47:17,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:47:17,454 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:17,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:17,455 INFO L85 PathProgramCache]: Analyzing trace with hash 314779076, now seen corresponding path program 5 times [2024-06-27 17:47:17,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:17,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25881404] [2024-06-27 17:47:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:17,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:17,709 INFO 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 17:47:17,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:17,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25881404] [2024-06-27 17:47:17,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25881404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:17,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:17,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:47:17,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767027212] [2024-06-27 17:47:17,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:17,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:47:17,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:17,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:47:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:47:17,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:17,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 771 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:17,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:17,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:17,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:17,943 INFO L124 PetriNetUnfolderBase]: 415/714 cut-off events. [2024-06-27 17:47:17,944 INFO L125 PetriNetUnfolderBase]: For 2955/2955 co-relation queries the response was YES. [2024-06-27 17:47:17,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3364 conditions, 714 events. 415/714 cut-off events. For 2955/2955 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3165 event pairs, 60 based on Foata normal form. 1/700 useless extension candidates. Maximal degree in co-relation 3310. Up to 297 conditions per place. [2024-06-27 17:47:17,952 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 66 selfloop transitions, 41 changer transitions 0/114 dead transitions. [2024-06-27 17:47:17,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1159 flow [2024-06-27 17:47:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:47:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:47:17,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 17:47:17,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934640522875817 [2024-06-27 17:47:17,954 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 771 flow. Second operand 9 states and 151 transitions. [2024-06-27 17:47:17,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1159 flow [2024-06-27 17:47:17,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 114 transitions, 1103 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:47:17,970 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 873 flow [2024-06-27 17:47:17,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=873, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2024-06-27 17:47:17,972 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 55 predicate places. [2024-06-27 17:47:17,973 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 873 flow [2024-06-27 17:47:17,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:17,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:17,973 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 17:47:17,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:47:17,973 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:17,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:17,974 INFO L85 PathProgramCache]: Analyzing trace with hash 322135376, now seen corresponding path program 6 times [2024-06-27 17:47:17,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:17,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179136127] [2024-06-27 17:47:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:17,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:18,237 INFO 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 17:47:18,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:18,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179136127] [2024-06-27 17:47:18,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179136127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:18,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:18,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:47:18,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312572318] [2024-06-27 17:47:18,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:18,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:47:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:47:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:47:18,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:18,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 873 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:18,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:18,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:18,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:18,479 INFO L124 PetriNetUnfolderBase]: 415/714 cut-off events. [2024-06-27 17:47:18,480 INFO L125 PetriNetUnfolderBase]: For 3553/3559 co-relation queries the response was YES. [2024-06-27 17:47:18,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3485 conditions, 714 events. 415/714 cut-off events. For 3553/3559 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3160 event pairs, 64 based on Foata normal form. 4/703 useless extension candidates. Maximal degree in co-relation 3427. Up to 310 conditions per place. [2024-06-27 17:47:18,489 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 68 selfloop transitions, 45 changer transitions 0/120 dead transitions. [2024-06-27 17:47:18,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1285 flow [2024-06-27 17:47:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:47:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:47:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 17:47:18,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:18,491 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 873 flow. Second operand 9 states and 153 transitions. [2024-06-27 17:47:18,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1285 flow [2024-06-27 17:47:18,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 1207 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 17:47:18,505 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 985 flow [2024-06-27 17:47:18,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=985, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2024-06-27 17:47:18,506 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 61 predicate places. [2024-06-27 17:47:18,506 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 985 flow [2024-06-27 17:47:18,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:18,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:18,507 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 17:47:18,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:47:18,507 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:18,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash 485330931, now seen corresponding path program 1 times [2024-06-27 17:47:18,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:18,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883541282] [2024-06-27 17:47:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:18,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:18,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:18,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883541282] [2024-06-27 17:47:18,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883541282] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:18,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462232791] [2024-06-27 17:47:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:18,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:18,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:18,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:18,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:47:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:18,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 17:47:18,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:18,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:18,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462232791] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:18,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:18,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-06-27 17:47:18,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788253303] [2024-06-27 17:47:18,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:18,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:47:18,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:47:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:47:18,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 17:47:18,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:18,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:18,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 17:47:18,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:18,921 INFO L124 PetriNetUnfolderBase]: 396/727 cut-off events. [2024-06-27 17:47:18,922 INFO L125 PetriNetUnfolderBase]: For 4964/5041 co-relation queries the response was YES. [2024-06-27 17:47:18,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 727 events. 396/727 cut-off events. For 4964/5041 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3283 event pairs, 80 based on Foata normal form. 61/736 useless extension candidates. Maximal degree in co-relation 3535. Up to 258 conditions per place. [2024-06-27 17:47:18,933 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 67 selfloop transitions, 27 changer transitions 0/120 dead transitions. [2024-06-27 17:47:18,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1383 flow [2024-06-27 17:47:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:47:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:47:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 17:47:18,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-06-27 17:47:18,935 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 985 flow. Second operand 6 states and 138 transitions. [2024-06-27 17:47:18,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1383 flow [2024-06-27 17:47:18,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 1293 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 17:47:18,950 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 1003 flow [2024-06-27 17:47:18,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1003, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2024-06-27 17:47:18,951 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 64 predicate places. [2024-06-27 17:47:18,951 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 1003 flow [2024-06-27 17:47:18,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:18,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:18,952 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 17:47:18,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 17:47:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 17:47:19,168 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:19,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:19,168 INFO L85 PathProgramCache]: Analyzing trace with hash 392354368, now seen corresponding path program 1 times [2024-06-27 17:47:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:19,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787582508] [2024-06-27 17:47:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:19,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:19,477 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 17:47:19,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:19,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787582508] [2024-06-27 17:47:19,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787582508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:19,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:19,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:19,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36588408] [2024-06-27 17:47:19,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:19,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:19,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:19,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:19,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:19,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 1003 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:19,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:19,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:19,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:19,844 INFO L124 PetriNetUnfolderBase]: 547/951 cut-off events. [2024-06-27 17:47:19,844 INFO L125 PetriNetUnfolderBase]: For 6044/6049 co-relation queries the response was YES. [2024-06-27 17:47:19,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4804 conditions, 951 events. 547/951 cut-off events. For 6044/6049 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4367 event pairs, 60 based on Foata normal form. 7/941 useless extension candidates. Maximal degree in co-relation 4740. Up to 341 conditions per place. [2024-06-27 17:47:19,856 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 86 selfloop transitions, 51 changer transitions 0/144 dead transitions. [2024-06-27 17:47:19,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 144 transitions, 1582 flow [2024-06-27 17:47:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 17:47:19,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235294117647059 [2024-06-27 17:47:19,887 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 1003 flow. Second operand 10 states and 178 transitions. [2024-06-27 17:47:19,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 144 transitions, 1582 flow [2024-06-27 17:47:19,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 144 transitions, 1516 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 17:47:19,903 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 1120 flow [2024-06-27 17:47:19,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1120, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2024-06-27 17:47:19,904 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 73 predicate places. [2024-06-27 17:47:19,904 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 1120 flow [2024-06-27 17:47:19,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:19,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:19,904 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 17:47:19,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:47:19,905 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:19,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:19,905 INFO L85 PathProgramCache]: Analyzing trace with hash 991216414, now seen corresponding path program 2 times [2024-06-27 17:47:19,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:19,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886322313] [2024-06-27 17:47:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:19,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:20,207 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 17:47:20,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:20,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886322313] [2024-06-27 17:47:20,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886322313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:20,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:20,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:20,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690969041] [2024-06-27 17:47:20,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:20,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:20,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:20,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:20,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:20,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:20,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 1120 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:20,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:20,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:20,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:20,578 INFO L124 PetriNetUnfolderBase]: 583/1011 cut-off events. [2024-06-27 17:47:20,578 INFO L125 PetriNetUnfolderBase]: For 7361/7361 co-relation queries the response was YES. [2024-06-27 17:47:20,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5257 conditions, 1011 events. 583/1011 cut-off events. For 7361/7361 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4743 event pairs, 86 based on Foata normal form. 3/997 useless extension candidates. Maximal degree in co-relation 5189. Up to 347 conditions per place. [2024-06-27 17:47:20,590 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 86 selfloop transitions, 52 changer transitions 0/145 dead transitions. [2024-06-27 17:47:20,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 145 transitions, 1667 flow [2024-06-27 17:47:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 17:47:20,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176470588235295 [2024-06-27 17:47:20,592 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 1120 flow. Second operand 10 states and 176 transitions. [2024-06-27 17:47:20,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 145 transitions, 1667 flow [2024-06-27 17:47:20,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 145 transitions, 1581 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:20,613 INFO L231 Difference]: Finished difference. Result has 113 places, 105 transitions, 1215 flow [2024-06-27 17:47:20,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1215, PETRI_PLACES=113, PETRI_TRANSITIONS=105} [2024-06-27 17:47:20,613 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 78 predicate places. [2024-06-27 17:47:20,614 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 105 transitions, 1215 flow [2024-06-27 17:47:20,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:20,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:20,614 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 17:47:20,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:47:20,615 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:20,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash 991220134, now seen corresponding path program 3 times [2024-06-27 17:47:20,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:20,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979705599] [2024-06-27 17:47:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:20,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:20,932 INFO 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 17:47:20,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:20,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979705599] [2024-06-27 17:47:20,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979705599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:20,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:20,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391272972] [2024-06-27 17:47:20,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:20,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:20,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:20,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 105 transitions, 1215 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:20,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:20,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:20,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:21,258 INFO L124 PetriNetUnfolderBase]: 601/1038 cut-off events. [2024-06-27 17:47:21,258 INFO L125 PetriNetUnfolderBase]: For 8196/8201 co-relation queries the response was YES. [2024-06-27 17:47:21,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1038 events. 601/1038 cut-off events. For 8196/8201 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4851 event pairs, 98 based on Foata normal form. 7/1028 useless extension candidates. Maximal degree in co-relation 5477. Up to 386 conditions per place. [2024-06-27 17:47:21,271 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 83 selfloop transitions, 54 changer transitions 0/144 dead transitions. [2024-06-27 17:47:21,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 144 transitions, 1699 flow [2024-06-27 17:47:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:21,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 17:47:21,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117647058823529 [2024-06-27 17:47:21,273 INFO L175 Difference]: Start difference. First operand has 113 places, 105 transitions, 1215 flow. Second operand 10 states and 174 transitions. [2024-06-27 17:47:21,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 144 transitions, 1699 flow [2024-06-27 17:47:21,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 144 transitions, 1622 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:21,298 INFO L231 Difference]: Finished difference. Result has 117 places, 107 transitions, 1291 flow [2024-06-27 17:47:21,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1291, PETRI_PLACES=117, PETRI_TRANSITIONS=107} [2024-06-27 17:47:21,299 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 82 predicate places. [2024-06-27 17:47:21,299 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 107 transitions, 1291 flow [2024-06-27 17:47:21,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:21,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:21,300 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 17:47:21,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:47:21,300 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:21,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:21,301 INFO L85 PathProgramCache]: Analyzing trace with hash 991220289, now seen corresponding path program 1 times [2024-06-27 17:47:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:21,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497749176] [2024-06-27 17:47:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:21,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:21,620 INFO 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 17:47:21,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497749176] [2024-06-27 17:47:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497749176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:21,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:21,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:21,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85768153] [2024-06-27 17:47:21,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:21,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:21,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:21,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:21,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:21,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 107 transitions, 1291 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:21,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:21,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:21,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:22,015 INFO L124 PetriNetUnfolderBase]: 619/1071 cut-off events. [2024-06-27 17:47:22,015 INFO L125 PetriNetUnfolderBase]: For 9365/9370 co-relation queries the response was YES. [2024-06-27 17:47:22,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5787 conditions, 1071 events. 619/1071 cut-off events. For 9365/9370 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5100 event pairs, 92 based on Foata normal form. 7/1061 useless extension candidates. Maximal degree in co-relation 5714. Up to 410 conditions per place. [2024-06-27 17:47:22,034 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 84 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-06-27 17:47:22,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 146 transitions, 1758 flow [2024-06-27 17:47:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 17:47:22,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117647058823529 [2024-06-27 17:47:22,036 INFO L175 Difference]: Start difference. First operand has 117 places, 107 transitions, 1291 flow. Second operand 10 states and 174 transitions. [2024-06-27 17:47:22,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 146 transitions, 1758 flow [2024-06-27 17:47:22,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 146 transitions, 1646 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 17:47:22,061 INFO L231 Difference]: Finished difference. Result has 119 places, 109 transitions, 1329 flow [2024-06-27 17:47:22,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1329, PETRI_PLACES=119, PETRI_TRANSITIONS=109} [2024-06-27 17:47:22,062 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 84 predicate places. [2024-06-27 17:47:22,062 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 1329 flow [2024-06-27 17:47:22,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:22,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:22,063 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 17:47:22,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:47:22,064 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:22,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:22,064 INFO L85 PathProgramCache]: Analyzing trace with hash 328371713, now seen corresponding path program 2 times [2024-06-27 17:47:22,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:22,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387556100] [2024-06-27 17:47:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:22,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:22,366 INFO 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 17:47:22,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:22,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387556100] [2024-06-27 17:47:22,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387556100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:22,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:22,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:22,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755808804] [2024-06-27 17:47:22,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:22,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:22,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:22,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:22,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:22,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 109 transitions, 1329 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:22,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:22,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:22,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:22,735 INFO L124 PetriNetUnfolderBase]: 637/1098 cut-off events. [2024-06-27 17:47:22,735 INFO L125 PetriNetUnfolderBase]: For 10073/10078 co-relation queries the response was YES. [2024-06-27 17:47:22,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6023 conditions, 1098 events. 637/1098 cut-off events. For 10073/10078 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5220 event pairs, 98 based on Foata normal form. 7/1088 useless extension candidates. Maximal degree in co-relation 5949. Up to 455 conditions per place. [2024-06-27 17:47:22,747 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 87 selfloop transitions, 51 changer transitions 0/145 dead transitions. [2024-06-27 17:47:22,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 145 transitions, 1790 flow [2024-06-27 17:47:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 17:47:22,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:22,749 INFO L175 Difference]: Start difference. First operand has 119 places, 109 transitions, 1329 flow. Second operand 10 states and 170 transitions. [2024-06-27 17:47:22,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 145 transitions, 1790 flow [2024-06-27 17:47:22,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 145 transitions, 1697 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 17:47:22,779 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1380 flow [2024-06-27 17:47:22,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1380, PETRI_PLACES=122, PETRI_TRANSITIONS=111} [2024-06-27 17:47:22,779 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 87 predicate places. [2024-06-27 17:47:22,779 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1380 flow [2024-06-27 17:47:22,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:22,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:22,780 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 17:47:22,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:47:22,780 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:22,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:22,781 INFO L85 PathProgramCache]: Analyzing trace with hash 328367838, now seen corresponding path program 4 times [2024-06-27 17:47:22,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:22,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651630338] [2024-06-27 17:47:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:22,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:23,077 INFO 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 17:47:23,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651630338] [2024-06-27 17:47:23,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651630338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:23,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:23,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:23,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890058867] [2024-06-27 17:47:23,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:23,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:23,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:23,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:23,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:23,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:23,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1380 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:23,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:23,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:23,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:23,436 INFO L124 PetriNetUnfolderBase]: 673/1158 cut-off events. [2024-06-27 17:47:23,436 INFO L125 PetriNetUnfolderBase]: For 12189/12194 co-relation queries the response was YES. [2024-06-27 17:47:23,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6503 conditions, 1158 events. 673/1158 cut-off events. For 12189/12194 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5601 event pairs, 92 based on Foata normal form. 7/1148 useless extension candidates. Maximal degree in co-relation 6427. Up to 484 conditions per place. [2024-06-27 17:47:23,448 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 52 changer transitions 0/152 dead transitions. [2024-06-27 17:47:23,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 152 transitions, 1955 flow [2024-06-27 17:47:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 17:47:23,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058823529411764 [2024-06-27 17:47:23,450 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1380 flow. Second operand 10 states and 172 transitions. [2024-06-27 17:47:23,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 152 transitions, 1955 flow [2024-06-27 17:47:23,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 152 transitions, 1837 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 17:47:23,483 INFO L231 Difference]: Finished difference. Result has 125 places, 115 transitions, 1453 flow [2024-06-27 17:47:23,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1453, PETRI_PLACES=125, PETRI_TRANSITIONS=115} [2024-06-27 17:47:23,484 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 90 predicate places. [2024-06-27 17:47:23,484 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 115 transitions, 1453 flow [2024-06-27 17:47:23,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:23,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:23,485 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 17:47:23,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:47:23,485 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:23,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash 187162218, now seen corresponding path program 5 times [2024-06-27 17:47:23,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:23,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868139205] [2024-06-27 17:47:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:23,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:23,746 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 17:47:23,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:23,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868139205] [2024-06-27 17:47:23,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868139205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:23,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:23,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:23,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449992548] [2024-06-27 17:47:23,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:23,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:23,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:23,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:23,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:23,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:23,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 115 transitions, 1453 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:23,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:23,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:23,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:24,133 INFO L124 PetriNetUnfolderBase]: 691/1188 cut-off events. [2024-06-27 17:47:24,134 INFO L125 PetriNetUnfolderBase]: For 13282/13282 co-relation queries the response was YES. [2024-06-27 17:47:24,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6739 conditions, 1188 events. 691/1188 cut-off events. For 13282/13282 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5794 event pairs, 98 based on Foata normal form. 3/1174 useless extension candidates. Maximal degree in co-relation 6661. Up to 527 conditions per place. [2024-06-27 17:47:24,178 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 90 selfloop transitions, 54 changer transitions 0/151 dead transitions. [2024-06-27 17:47:24,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 151 transitions, 1957 flow [2024-06-27 17:47:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 17:47:24,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:24,180 INFO L175 Difference]: Start difference. First operand has 125 places, 115 transitions, 1453 flow. Second operand 10 states and 170 transitions. [2024-06-27 17:47:24,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 151 transitions, 1957 flow [2024-06-27 17:47:24,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 151 transitions, 1879 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:24,214 INFO L231 Difference]: Finished difference. Result has 129 places, 117 transitions, 1534 flow [2024-06-27 17:47:24,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1534, PETRI_PLACES=129, PETRI_TRANSITIONS=117} [2024-06-27 17:47:24,215 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 94 predicate places. [2024-06-27 17:47:24,215 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 117 transitions, 1534 flow [2024-06-27 17:47:24,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:24,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:24,216 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 17:47:24,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:47:24,216 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:24,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:24,217 INFO L85 PathProgramCache]: Analyzing trace with hash 334771818, now seen corresponding path program 6 times [2024-06-27 17:47:24,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:24,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717769248] [2024-06-27 17:47:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:24,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:24,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:24,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717769248] [2024-06-27 17:47:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717769248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:24,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:24,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311021474] [2024-06-27 17:47:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:24,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:24,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:24,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 117 transitions, 1534 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:24,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:24,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:24,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:24,858 INFO L124 PetriNetUnfolderBase]: 709/1215 cut-off events. [2024-06-27 17:47:24,858 INFO L125 PetriNetUnfolderBase]: For 14795/14795 co-relation queries the response was YES. [2024-06-27 17:47:24,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7023 conditions, 1215 events. 709/1215 cut-off events. For 14795/14795 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5932 event pairs, 96 based on Foata normal form. 3/1201 useless extension candidates. Maximal degree in co-relation 6943. Up to 556 conditions per place. [2024-06-27 17:47:24,871 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 92 selfloop transitions, 54 changer transitions 0/153 dead transitions. [2024-06-27 17:47:24,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 153 transitions, 2045 flow [2024-06-27 17:47:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 17:47:24,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:24,872 INFO L175 Difference]: Start difference. First operand has 129 places, 117 transitions, 1534 flow. Second operand 10 states and 170 transitions. [2024-06-27 17:47:24,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 153 transitions, 2045 flow [2024-06-27 17:47:24,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1962 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 17:47:24,907 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 1613 flow [2024-06-27 17:47:24,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1613, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-06-27 17:47:24,907 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 97 predicate places. [2024-06-27 17:47:24,908 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 1613 flow [2024-06-27 17:47:24,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:24,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:24,908 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 17:47:24,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:47:24,908 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:24,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:24,909 INFO L85 PathProgramCache]: Analyzing trace with hash 335008193, now seen corresponding path program 3 times [2024-06-27 17:47:24,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:24,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555239333] [2024-06-27 17:47:24,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:24,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:25,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:25,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555239333] [2024-06-27 17:47:25,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555239333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:25,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:25,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:25,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398421370] [2024-06-27 17:47:25,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:25,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:25,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:25,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:25,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 1613 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:25,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:25,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:25,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:25,607 INFO L124 PetriNetUnfolderBase]: 745/1275 cut-off events. [2024-06-27 17:47:25,607 INFO L125 PetriNetUnfolderBase]: For 16389/16394 co-relation queries the response was YES. [2024-06-27 17:47:25,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7460 conditions, 1275 events. 745/1275 cut-off events. For 16389/16394 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6327 event pairs, 98 based on Foata normal form. 16/1274 useless extension candidates. Maximal degree in co-relation 7378. Up to 588 conditions per place. [2024-06-27 17:47:25,622 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 98 selfloop transitions, 55 changer transitions 0/160 dead transitions. [2024-06-27 17:47:25,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 160 transitions, 2165 flow [2024-06-27 17:47:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 17:47:25,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088235294117647 [2024-06-27 17:47:25,624 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 1613 flow. Second operand 10 states and 173 transitions. [2024-06-27 17:47:25,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 160 transitions, 2165 flow [2024-06-27 17:47:25,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 160 transitions, 2043 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 17:47:25,666 INFO L231 Difference]: Finished difference. Result has 135 places, 123 transitions, 1689 flow [2024-06-27 17:47:25,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1689, PETRI_PLACES=135, PETRI_TRANSITIONS=123} [2024-06-27 17:47:25,667 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 100 predicate places. [2024-06-27 17:47:25,667 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 1689 flow [2024-06-27 17:47:25,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:25,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:25,668 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 17:47:25,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:47:25,668 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:25,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:25,668 INFO L85 PathProgramCache]: Analyzing trace with hash 334771973, now seen corresponding path program 4 times [2024-06-27 17:47:25,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:25,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845753034] [2024-06-27 17:47:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:25,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:25,961 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 17:47:25,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:25,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845753034] [2024-06-27 17:47:25,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845753034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:25,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:25,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:25,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337023816] [2024-06-27 17:47:25,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:25,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:25,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:25,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:26,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:26,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 123 transitions, 1689 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:26,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:26,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:26,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:26,348 INFO L124 PetriNetUnfolderBase]: 763/1305 cut-off events. [2024-06-27 17:47:26,349 INFO L125 PetriNetUnfolderBase]: For 18011/18016 co-relation queries the response was YES. [2024-06-27 17:47:26,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7794 conditions, 1305 events. 763/1305 cut-off events. For 18011/18016 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6527 event pairs, 98 based on Foata normal form. 7/1295 useless extension candidates. Maximal degree in co-relation 7710. Up to 613 conditions per place. [2024-06-27 17:47:26,363 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 58 changer transitions 0/159 dead transitions. [2024-06-27 17:47:26,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 159 transitions, 2193 flow [2024-06-27 17:47:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 17:47:26,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:26,365 INFO L175 Difference]: Start difference. First operand has 135 places, 123 transitions, 1689 flow. Second operand 10 states and 170 transitions. [2024-06-27 17:47:26,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 159 transitions, 2193 flow [2024-06-27 17:47:26,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 159 transitions, 2103 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:26,409 INFO L231 Difference]: Finished difference. Result has 139 places, 125 transitions, 1764 flow [2024-06-27 17:47:26,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1764, PETRI_PLACES=139, PETRI_TRANSITIONS=125} [2024-06-27 17:47:26,409 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 104 predicate places. [2024-06-27 17:47:26,410 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 125 transitions, 1764 flow [2024-06-27 17:47:26,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:26,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:26,410 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 17:47:26,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:47:26,410 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:26,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash 316337792, now seen corresponding path program 7 times [2024-06-27 17:47:26,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:26,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039707343] [2024-06-27 17:47:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:26,703 INFO 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 17:47:26,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:26,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039707343] [2024-06-27 17:47:26,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039707343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:26,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:26,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:26,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242394826] [2024-06-27 17:47:26,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:26,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:26,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:26,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:26,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:26,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 125 transitions, 1764 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:26,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:26,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:26,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:27,122 INFO L124 PetriNetUnfolderBase]: 781/1331 cut-off events. [2024-06-27 17:47:27,122 INFO L125 PetriNetUnfolderBase]: For 20951/20957 co-relation queries the response was YES. [2024-06-27 17:47:27,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8129 conditions, 1331 events. 781/1331 cut-off events. For 20951/20957 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6675 event pairs, 101 based on Foata normal form. 9/1323 useless extension candidates. Maximal degree in co-relation 8043. Up to 637 conditions per place. [2024-06-27 17:47:27,138 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 92 selfloop transitions, 59 changer transitions 0/158 dead transitions. [2024-06-27 17:47:27,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 158 transitions, 2295 flow [2024-06-27 17:47:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 17:47:27,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 17:47:27,140 INFO L175 Difference]: Start difference. First operand has 139 places, 125 transitions, 1764 flow. Second operand 10 states and 167 transitions. [2024-06-27 17:47:27,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 158 transitions, 2295 flow [2024-06-27 17:47:27,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 2198 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 17:47:27,188 INFO L231 Difference]: Finished difference. Result has 142 places, 127 transitions, 1843 flow [2024-06-27 17:47:27,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1843, PETRI_PLACES=142, PETRI_TRANSITIONS=127} [2024-06-27 17:47:27,189 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 107 predicate places. [2024-06-27 17:47:27,189 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 127 transitions, 1843 flow [2024-06-27 17:47:27,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:27,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:27,190 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 17:47:27,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:47:27,190 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:27,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:27,191 INFO L85 PathProgramCache]: Analyzing trace with hash 316337947, now seen corresponding path program 5 times [2024-06-27 17:47:27,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:27,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276110141] [2024-06-27 17:47:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:27,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:27,457 INFO 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 17:47:27,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:27,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276110141] [2024-06-27 17:47:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276110141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:27,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:27,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:27,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702615518] [2024-06-27 17:47:27,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:27,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:27,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:27,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:27,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 127 transitions, 1843 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:27,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:27,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:27,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:27,804 INFO L124 PetriNetUnfolderBase]: 799/1358 cut-off events. [2024-06-27 17:47:27,804 INFO L125 PetriNetUnfolderBase]: For 22219/22225 co-relation queries the response was YES. [2024-06-27 17:47:27,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8317 conditions, 1358 events. 799/1358 cut-off events. For 22219/22225 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6789 event pairs, 99 based on Foata normal form. 9/1350 useless extension candidates. Maximal degree in co-relation 8229. Up to 661 conditions per place. [2024-06-27 17:47:27,819 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 60 changer transitions 0/160 dead transitions. [2024-06-27 17:47:27,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 160 transitions, 2347 flow [2024-06-27 17:47:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 17:47:27,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 17:47:27,821 INFO L175 Difference]: Start difference. First operand has 142 places, 127 transitions, 1843 flow. Second operand 10 states and 167 transitions. [2024-06-27 17:47:27,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 160 transitions, 2347 flow [2024-06-27 17:47:27,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 160 transitions, 2217 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 17:47:27,870 INFO L231 Difference]: Finished difference. Result has 144 places, 129 transitions, 1886 flow [2024-06-27 17:47:27,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1886, PETRI_PLACES=144, PETRI_TRANSITIONS=129} [2024-06-27 17:47:27,871 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 109 predicate places. [2024-06-27 17:47:27,871 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 129 transitions, 1886 flow [2024-06-27 17:47:27,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:27,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:27,872 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 17:47:27,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:47:27,872 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:27,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:27,873 INFO L85 PathProgramCache]: Analyzing trace with hash 316574167, now seen corresponding path program 6 times [2024-06-27 17:47:27,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:27,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241725017] [2024-06-27 17:47:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:27,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:28,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:28,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241725017] [2024-06-27 17:47:28,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241725017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:28,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:28,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:28,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006432509] [2024-06-27 17:47:28,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:28,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:28,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:28,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:28,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:28,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 129 transitions, 1886 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:28,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:28,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:28,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:28,512 INFO L124 PetriNetUnfolderBase]: 835/1421 cut-off events. [2024-06-27 17:47:28,513 INFO L125 PetriNetUnfolderBase]: For 24198/24198 co-relation queries the response was YES. [2024-06-27 17:47:28,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8817 conditions, 1421 events. 835/1421 cut-off events. For 24198/24198 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7253 event pairs, 107 based on Foata normal form. 12/1416 useless extension candidates. Maximal degree in co-relation 8728. Up to 693 conditions per place. [2024-06-27 17:47:28,528 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 99 selfloop transitions, 61 changer transitions 0/167 dead transitions. [2024-06-27 17:47:28,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 167 transitions, 2464 flow [2024-06-27 17:47:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 17:47:28,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:28,530 INFO L175 Difference]: Start difference. First operand has 144 places, 129 transitions, 1886 flow. Second operand 10 states and 170 transitions. [2024-06-27 17:47:28,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 167 transitions, 2464 flow [2024-06-27 17:47:28,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 167 transitions, 2360 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 17:47:28,586 INFO L231 Difference]: Finished difference. Result has 148 places, 133 transitions, 2002 flow [2024-06-27 17:47:28,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2002, PETRI_PLACES=148, PETRI_TRANSITIONS=133} [2024-06-27 17:47:28,587 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 113 predicate places. [2024-06-27 17:47:28,587 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 133 transitions, 2002 flow [2024-06-27 17:47:28,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:28,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:28,587 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 17:47:28,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:47:28,588 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:28,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash 168728192, now seen corresponding path program 8 times [2024-06-27 17:47:28,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:28,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248626192] [2024-06-27 17:47:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:28,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:28,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:28,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248626192] [2024-06-27 17:47:28,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248626192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:28,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:28,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:28,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113927] [2024-06-27 17:47:28,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:28,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:28,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:28,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:28,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:28,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:28,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 133 transitions, 2002 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:28,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:28,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:28,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:29,208 INFO L124 PetriNetUnfolderBase]: 853/1448 cut-off events. [2024-06-27 17:47:29,208 INFO L125 PetriNetUnfolderBase]: For 27567/27567 co-relation queries the response was YES. [2024-06-27 17:47:29,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9257 conditions, 1448 events. 853/1448 cut-off events. For 27567/27567 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7399 event pairs, 113 based on Foata normal form. 3/1434 useless extension candidates. Maximal degree in co-relation 9165. Up to 713 conditions per place. [2024-06-27 17:47:29,223 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 65 changer transitions 0/166 dead transitions. [2024-06-27 17:47:29,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 166 transitions, 2567 flow [2024-06-27 17:47:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 17:47:29,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 17:47:29,226 INFO L175 Difference]: Start difference. First operand has 148 places, 133 transitions, 2002 flow. Second operand 10 states and 167 transitions. [2024-06-27 17:47:29,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 166 transitions, 2567 flow [2024-06-27 17:47:29,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 166 transitions, 2464 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:29,289 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 2091 flow [2024-06-27 17:47:29,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2091, PETRI_PLACES=152, PETRI_TRANSITIONS=135} [2024-06-27 17:47:29,290 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 117 predicate places. [2024-06-27 17:47:29,291 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 2091 flow [2024-06-27 17:47:29,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:29,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:29,291 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 17:47:29,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:47:29,291 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:29,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:29,292 INFO L85 PathProgramCache]: Analyzing trace with hash 168728347, now seen corresponding path program 7 times [2024-06-27 17:47:29,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:29,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205629152] [2024-06-27 17:47:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:29,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:29,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:29,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205629152] [2024-06-27 17:47:29,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205629152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:29,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:29,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:29,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15347075] [2024-06-27 17:47:29,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:29,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:29,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:29,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:29,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:29,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 135 transitions, 2091 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:29,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:29,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:29,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:30,022 INFO L124 PetriNetUnfolderBase]: 871/1475 cut-off events. [2024-06-27 17:47:30,022 INFO L125 PetriNetUnfolderBase]: For 29257/29263 co-relation queries the response was YES. [2024-06-27 17:47:30,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9463 conditions, 1475 events. 871/1475 cut-off events. For 29257/29263 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7542 event pairs, 111 based on Foata normal form. 9/1467 useless extension candidates. Maximal degree in co-relation 9369. Up to 737 conditions per place. [2024-06-27 17:47:30,035 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 66 changer transitions 0/168 dead transitions. [2024-06-27 17:47:30,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 168 transitions, 2625 flow [2024-06-27 17:47:30,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 17:47:30,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 17:47:30,039 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 2091 flow. Second operand 10 states and 167 transitions. [2024-06-27 17:47:30,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 168 transitions, 2625 flow [2024-06-27 17:47:30,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 168 transitions, 2481 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 17:47:30,097 INFO L231 Difference]: Finished difference. Result has 154 places, 137 transitions, 2138 flow [2024-06-27 17:47:30,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2138, PETRI_PLACES=154, PETRI_TRANSITIONS=137} [2024-06-27 17:47:30,098 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 119 predicate places. [2024-06-27 17:47:30,098 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 137 transitions, 2138 flow [2024-06-27 17:47:30,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:30,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:30,098 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 17:47:30,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:47:30,099 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:30,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:30,099 INFO L85 PathProgramCache]: Analyzing trace with hash 168666812, now seen corresponding path program 9 times [2024-06-27 17:47:30,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:30,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848614672] [2024-06-27 17:47:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:30,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:30,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:30,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848614672] [2024-06-27 17:47:30,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848614672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:30,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:30,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:30,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523398995] [2024-06-27 17:47:30,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:30,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:30,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:30,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:30,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 137 transitions, 2138 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:30,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:30,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:30,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:30,717 INFO L124 PetriNetUnfolderBase]: 889/1505 cut-off events. [2024-06-27 17:47:30,717 INFO L125 PetriNetUnfolderBase]: For 31950/31956 co-relation queries the response was YES. [2024-06-27 17:47:30,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9801 conditions, 1505 events. 889/1505 cut-off events. For 31950/31956 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7759 event pairs, 105 based on Foata normal form. 9/1497 useless extension candidates. Maximal degree in co-relation 9706. Up to 742 conditions per place. [2024-06-27 17:47:30,734 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 100 selfloop transitions, 67 changer transitions 0/174 dead transitions. [2024-06-27 17:47:30,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 174 transitions, 2804 flow [2024-06-27 17:47:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 17:47:30,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970588235294118 [2024-06-27 17:47:30,736 INFO L175 Difference]: Start difference. First operand has 154 places, 137 transitions, 2138 flow. Second operand 10 states and 169 transitions. [2024-06-27 17:47:30,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 174 transitions, 2804 flow [2024-06-27 17:47:30,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 174 transitions, 2694 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:30,801 INFO L231 Difference]: Finished difference. Result has 158 places, 140 transitions, 2253 flow [2024-06-27 17:47:30,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2253, PETRI_PLACES=158, PETRI_TRANSITIONS=140} [2024-06-27 17:47:30,806 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 123 predicate places. [2024-06-27 17:47:30,807 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 140 transitions, 2253 flow [2024-06-27 17:47:30,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:30,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:30,807 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 17:47:30,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:47:30,807 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:30,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1404542661, now seen corresponding path program 8 times [2024-06-27 17:47:30,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:30,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951545162] [2024-06-27 17:47:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:30,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:31,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:31,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951545162] [2024-06-27 17:47:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951545162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:31,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:31,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:31,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557763056] [2024-06-27 17:47:31,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:31,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:31,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:31,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:31,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 140 transitions, 2253 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:31,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:31,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:31,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:31,406 INFO L124 PetriNetUnfolderBase]: 925/1565 cut-off events. [2024-06-27 17:47:31,407 INFO L125 PetriNetUnfolderBase]: For 34162/34168 co-relation queries the response was YES. [2024-06-27 17:47:31,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10283 conditions, 1565 events. 925/1565 cut-off events. For 34162/34168 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8142 event pairs, 105 based on Foata normal form. 12/1560 useless extension candidates. Maximal degree in co-relation 10186. Up to 798 conditions per place. [2024-06-27 17:47:31,421 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 98 selfloop transitions, 71 changer transitions 0/176 dead transitions. [2024-06-27 17:47:31,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 176 transitions, 2863 flow [2024-06-27 17:47:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 17:47:31,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2024-06-27 17:47:31,423 INFO L175 Difference]: Start difference. First operand has 158 places, 140 transitions, 2253 flow. Second operand 10 states and 166 transitions. [2024-06-27 17:47:31,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 176 transitions, 2863 flow [2024-06-27 17:47:31,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 176 transitions, 2743 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:31,495 INFO L231 Difference]: Finished difference. Result has 161 places, 145 transitions, 2402 flow [2024-06-27 17:47:31,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2402, PETRI_PLACES=161, PETRI_TRANSITIONS=145} [2024-06-27 17:47:31,498 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2024-06-27 17:47:31,498 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 145 transitions, 2402 flow [2024-06-27 17:47:31,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:31,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:31,499 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 17:47:31,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:47:31,499 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:31,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:31,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1396268451, now seen corresponding path program 9 times [2024-06-27 17:47:31,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:31,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554491496] [2024-06-27 17:47:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:31,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:31,762 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 17:47:31,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:31,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554491496] [2024-06-27 17:47:31,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554491496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:31,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:31,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970454542] [2024-06-27 17:47:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:31,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:31,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:31,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:31,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 145 transitions, 2402 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:31,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:31,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:31,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:32,132 INFO L124 PetriNetUnfolderBase]: 925/1565 cut-off events. [2024-06-27 17:47:32,132 INFO L125 PetriNetUnfolderBase]: For 38341/38347 co-relation queries the response was YES. [2024-06-27 17:47:32,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10605 conditions, 1565 events. 925/1565 cut-off events. For 38341/38347 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8149 event pairs, 107 based on Foata normal form. 12/1560 useless extension candidates. Maximal degree in co-relation 10506. Up to 822 conditions per place. [2024-06-27 17:47:32,149 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 100 selfloop transitions, 73 changer transitions 0/180 dead transitions. [2024-06-27 17:47:32,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 180 transitions, 2984 flow [2024-06-27 17:47:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 17:47:32,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:32,151 INFO L175 Difference]: Start difference. First operand has 161 places, 145 transitions, 2402 flow. Second operand 10 states and 170 transitions. [2024-06-27 17:47:32,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 180 transitions, 2984 flow [2024-06-27 17:47:32,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 180 transitions, 2859 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:32,238 INFO L231 Difference]: Finished difference. Result has 166 places, 148 transitions, 2507 flow [2024-06-27 17:47:32,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2507, PETRI_PLACES=166, PETRI_TRANSITIONS=148} [2024-06-27 17:47:32,238 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 131 predicate places. [2024-06-27 17:47:32,239 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 148 transitions, 2507 flow [2024-06-27 17:47:32,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:32,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:32,239 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 17:47:32,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:47:32,240 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:32,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1396262716, now seen corresponding path program 10 times [2024-06-27 17:47:32,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:32,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556483909] [2024-06-27 17:47:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:32,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:32,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:32,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556483909] [2024-06-27 17:47:32,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556483909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:32,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:32,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:32,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570820687] [2024-06-27 17:47:32,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:32,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:32,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:32,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:32,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:32,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 148 transitions, 2507 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:32,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:32,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:32,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:32,831 INFO L124 PetriNetUnfolderBase]: 919/1556 cut-off events. [2024-06-27 17:47:32,831 INFO L125 PetriNetUnfolderBase]: For 39801/39807 co-relation queries the response was YES. [2024-06-27 17:47:32,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10565 conditions, 1556 events. 919/1556 cut-off events. For 39801/39807 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8058 event pairs, 105 based on Foata normal form. 3/1542 useless extension candidates. Maximal degree in co-relation 10463. Up to 814 conditions per place. [2024-06-27 17:47:32,842 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 75 changer transitions 0/177 dead transitions. [2024-06-27 17:47:32,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 177 transitions, 3039 flow [2024-06-27 17:47:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 17:47:32,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 17:47:32,843 INFO L175 Difference]: Start difference. First operand has 166 places, 148 transitions, 2507 flow. Second operand 10 states and 167 transitions. [2024-06-27 17:47:32,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 177 transitions, 3039 flow [2024-06-27 17:47:32,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 177 transitions, 2929 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 17:47:32,908 INFO L231 Difference]: Finished difference. Result has 171 places, 148 transitions, 2552 flow [2024-06-27 17:47:32,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2552, PETRI_PLACES=171, PETRI_TRANSITIONS=148} [2024-06-27 17:47:32,909 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 136 predicate places. [2024-06-27 17:47:32,909 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 148 transitions, 2552 flow [2024-06-27 17:47:32,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:32,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:32,909 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 17:47:32,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:47:32,910 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:32,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:32,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1396262871, now seen corresponding path program 10 times [2024-06-27 17:47:32,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:32,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437695757] [2024-06-27 17:47:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:32,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:33,137 INFO 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 17:47:33,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:33,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437695757] [2024-06-27 17:47:33,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437695757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:33,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:33,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:47:33,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953497123] [2024-06-27 17:47:33,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:33,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:47:33,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:33,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:47:33,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:47:33,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:33,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 148 transitions, 2552 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:33,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:33,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:33,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:33,521 INFO L124 PetriNetUnfolderBase]: 937/1586 cut-off events. [2024-06-27 17:47:33,522 INFO L125 PetriNetUnfolderBase]: For 42420/42426 co-relation queries the response was YES. [2024-06-27 17:47:33,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10778 conditions, 1586 events. 937/1586 cut-off events. For 42420/42426 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8272 event pairs, 117 based on Foata normal form. 3/1572 useless extension candidates. Maximal degree in co-relation 10673. Up to 838 conditions per place. [2024-06-27 17:47:33,536 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 96 selfloop transitions, 76 changer transitions 0/179 dead transitions. [2024-06-27 17:47:33,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 179 transitions, 3108 flow [2024-06-27 17:47:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:47:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:47:33,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 17:47:33,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-27 17:47:33,538 INFO L175 Difference]: Start difference. First operand has 171 places, 148 transitions, 2552 flow. Second operand 10 states and 167 transitions. [2024-06-27 17:47:33,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 179 transitions, 3108 flow [2024-06-27 17:47:33,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 179 transitions, 2896 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:33,636 INFO L231 Difference]: Finished difference. Result has 172 places, 150 transitions, 2561 flow [2024-06-27 17:47:33,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2561, PETRI_PLACES=172, PETRI_TRANSITIONS=150} [2024-06-27 17:47:33,637 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 137 predicate places. [2024-06-27 17:47:33,637 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 150 transitions, 2561 flow [2024-06-27 17:47:33,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:33,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:33,637 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 17:47:33,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:47:33,638 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:33,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:33,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1963042471, now seen corresponding path program 1 times [2024-06-27 17:47:33,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:33,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969255806] [2024-06-27 17:47:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:33,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:33,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:33,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969255806] [2024-06-27 17:47:33,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969255806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:33,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:33,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:33,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517941533] [2024-06-27 17:47:33,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:33,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:33,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:33,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:33,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 150 transitions, 2561 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:33,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:33,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:33,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:34,383 INFO L124 PetriNetUnfolderBase]: 991/1680 cut-off events. [2024-06-27 17:47:34,383 INFO L125 PetriNetUnfolderBase]: For 48161/48166 co-relation queries the response was YES. [2024-06-27 17:47:34,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11274 conditions, 1680 events. 991/1680 cut-off events. For 48161/48166 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8885 event pairs, 60 based on Foata normal form. 13/1676 useless extension candidates. Maximal degree in co-relation 11169. Up to 685 conditions per place. [2024-06-27 17:47:34,397 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 82 changer transitions 0/200 dead transitions. [2024-06-27 17:47:34,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 200 transitions, 3395 flow [2024-06-27 17:47:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-27 17:47:34,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213903743315508 [2024-06-27 17:47:34,398 INFO L175 Difference]: Start difference. First operand has 172 places, 150 transitions, 2561 flow. Second operand 11 states and 195 transitions. [2024-06-27 17:47:34,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 200 transitions, 3395 flow [2024-06-27 17:47:34,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 200 transitions, 3262 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 17:47:34,469 INFO L231 Difference]: Finished difference. Result has 176 places, 151 transitions, 2624 flow [2024-06-27 17:47:34,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2624, PETRI_PLACES=176, PETRI_TRANSITIONS=151} [2024-06-27 17:47:34,470 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 141 predicate places. [2024-06-27 17:47:34,470 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 151 transitions, 2624 flow [2024-06-27 17:47:34,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:34,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:34,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:34,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:47:34,471 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:34,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash 662938569, now seen corresponding path program 2 times [2024-06-27 17:47:34,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:34,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260993757] [2024-06-27 17:47:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:34,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:34,749 INFO 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 17:47:34,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:34,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260993757] [2024-06-27 17:47:34,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260993757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:34,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:34,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:34,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039619946] [2024-06-27 17:47:34,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:34,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:34,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:34,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:34,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:34,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:34,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 151 transitions, 2624 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:34,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:34,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:34,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:35,197 INFO L124 PetriNetUnfolderBase]: 1045/1767 cut-off events. [2024-06-27 17:47:35,197 INFO L125 PetriNetUnfolderBase]: For 53897/53902 co-relation queries the response was YES. [2024-06-27 17:47:35,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11789 conditions, 1767 events. 1045/1767 cut-off events. For 53897/53902 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9484 event pairs, 126 based on Foata normal form. 13/1763 useless extension candidates. Maximal degree in co-relation 11682. Up to 856 conditions per place. [2024-06-27 17:47:35,211 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 80 changer transitions 0/198 dead transitions. [2024-06-27 17:47:35,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 198 transitions, 3393 flow [2024-06-27 17:47:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 17:47:35,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516042780748663 [2024-06-27 17:47:35,213 INFO L175 Difference]: Start difference. First operand has 176 places, 151 transitions, 2624 flow. Second operand 11 states and 193 transitions. [2024-06-27 17:47:35,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 198 transitions, 3393 flow [2024-06-27 17:47:35,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 198 transitions, 3242 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:47:35,288 INFO L231 Difference]: Finished difference. Result has 180 places, 152 transitions, 2666 flow [2024-06-27 17:47:35,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2666, PETRI_PLACES=180, PETRI_TRANSITIONS=152} [2024-06-27 17:47:35,289 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 145 predicate places. [2024-06-27 17:47:35,289 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 152 transitions, 2666 flow [2024-06-27 17:47:35,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:35,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:35,289 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 17:47:35,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:47:35,290 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:35,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:35,290 INFO L85 PathProgramCache]: Analyzing trace with hash 663058539, now seen corresponding path program 3 times [2024-06-27 17:47:35,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:35,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641468880] [2024-06-27 17:47:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:35,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:35,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:35,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641468880] [2024-06-27 17:47:35,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641468880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:35,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:35,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:35,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732143366] [2024-06-27 17:47:35,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:35,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:35,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:35,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:35,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:35,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 152 transitions, 2666 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:35,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:35,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:35,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:36,025 INFO L124 PetriNetUnfolderBase]: 1099/1860 cut-off events. [2024-06-27 17:47:36,025 INFO L125 PetriNetUnfolderBase]: For 58599/58599 co-relation queries the response was YES. [2024-06-27 17:47:36,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12315 conditions, 1860 events. 1099/1860 cut-off events. For 58599/58599 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10121 event pairs, 150 based on Foata normal form. 9/1852 useless extension candidates. Maximal degree in co-relation 12207. Up to 947 conditions per place. [2024-06-27 17:47:36,040 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 82 changer transitions 0/196 dead transitions. [2024-06-27 17:47:36,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 196 transitions, 3325 flow [2024-06-27 17:47:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-27 17:47:36,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106951871657754 [2024-06-27 17:47:36,042 INFO L175 Difference]: Start difference. First operand has 180 places, 152 transitions, 2666 flow. Second operand 11 states and 191 transitions. [2024-06-27 17:47:36,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 196 transitions, 3325 flow [2024-06-27 17:47:36,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 196 transitions, 3182 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:36,132 INFO L231 Difference]: Finished difference. Result has 185 places, 153 transitions, 2720 flow [2024-06-27 17:47:36,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2720, PETRI_PLACES=185, PETRI_TRANSITIONS=153} [2024-06-27 17:47:36,132 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 150 predicate places. [2024-06-27 17:47:36,133 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 153 transitions, 2720 flow [2024-06-27 17:47:36,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:36,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:36,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:36,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:47:36,133 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:36,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:36,134 INFO L85 PathProgramCache]: Analyzing trace with hash 663053889, now seen corresponding path program 4 times [2024-06-27 17:47:36,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:36,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792409022] [2024-06-27 17:47:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:36,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:36,408 INFO 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 17:47:36,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:36,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792409022] [2024-06-27 17:47:36,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792409022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:36,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:36,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184121244] [2024-06-27 17:47:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:36,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:36,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:36,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 153 transitions, 2720 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:36,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:36,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:36,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:36,881 INFO L124 PetriNetUnfolderBase]: 1153/1947 cut-off events. [2024-06-27 17:47:36,881 INFO L125 PetriNetUnfolderBase]: For 62521/62526 co-relation queries the response was YES. [2024-06-27 17:47:36,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12859 conditions, 1947 events. 1153/1947 cut-off events. For 62521/62526 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10702 event pairs, 168 based on Foata normal form. 13/1943 useless extension candidates. Maximal degree in co-relation 12750. Up to 1019 conditions per place. [2024-06-27 17:47:36,896 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 83 changer transitions 0/197 dead transitions. [2024-06-27 17:47:36,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 197 transitions, 3425 flow [2024-06-27 17:47:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-27 17:47:36,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106951871657754 [2024-06-27 17:47:36,897 INFO L175 Difference]: Start difference. First operand has 185 places, 153 transitions, 2720 flow. Second operand 11 states and 191 transitions. [2024-06-27 17:47:36,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 197 transitions, 3425 flow [2024-06-27 17:47:36,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 197 transitions, 3247 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 17:47:36,984 INFO L231 Difference]: Finished difference. Result has 186 places, 154 transitions, 2741 flow [2024-06-27 17:47:36,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2741, PETRI_PLACES=186, PETRI_TRANSITIONS=154} [2024-06-27 17:47:36,985 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 151 predicate places. [2024-06-27 17:47:36,985 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 154 transitions, 2741 flow [2024-06-27 17:47:36,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:36,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:36,985 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 17:47:36,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:47:36,986 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:36,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:36,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1507062269, now seen corresponding path program 5 times [2024-06-27 17:47:36,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:36,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732147298] [2024-06-27 17:47:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:36,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:37,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:37,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732147298] [2024-06-27 17:47:37,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732147298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:37,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:37,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:37,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942287998] [2024-06-27 17:47:37,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:37,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:37,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:37,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:37,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:37,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:37,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 154 transitions, 2741 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:37,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:37,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:37,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:37,685 INFO L124 PetriNetUnfolderBase]: 1207/2037 cut-off events. [2024-06-27 17:47:37,685 INFO L125 PetriNetUnfolderBase]: For 66993/66998 co-relation queries the response was YES. [2024-06-27 17:47:37,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13379 conditions, 2037 events. 1207/2037 cut-off events. For 66993/66998 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 11307 event pairs, 186 based on Foata normal form. 13/2033 useless extension candidates. Maximal degree in co-relation 13269. Up to 1112 conditions per place. [2024-06-27 17:47:37,702 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 109 selfloop transitions, 79 changer transitions 0/195 dead transitions. [2024-06-27 17:47:37,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 195 transitions, 3434 flow [2024-06-27 17:47:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 17:47:37,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:37,703 INFO L175 Difference]: Start difference. First operand has 186 places, 154 transitions, 2741 flow. Second operand 11 states and 187 transitions. [2024-06-27 17:47:37,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 195 transitions, 3434 flow [2024-06-27 17:47:37,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 3270 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 17:47:37,793 INFO L231 Difference]: Finished difference. Result has 189 places, 155 transitions, 2768 flow [2024-06-27 17:47:37,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2768, PETRI_PLACES=189, PETRI_TRANSITIONS=155} [2024-06-27 17:47:37,794 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 154 predicate places. [2024-06-27 17:47:37,794 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 155 transitions, 2768 flow [2024-06-27 17:47:37,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:37,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:37,794 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 17:47:37,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:47:37,795 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:37,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:37,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1505159489, now seen corresponding path program 6 times [2024-06-27 17:47:37,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:37,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956324243] [2024-06-27 17:47:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:38,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:38,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956324243] [2024-06-27 17:47:38,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956324243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:38,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:38,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:38,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147522140] [2024-06-27 17:47:38,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:38,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:38,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:38,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:38,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:38,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:38,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 155 transitions, 2768 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:38,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:38,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:38,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:38,556 INFO L124 PetriNetUnfolderBase]: 1261/2127 cut-off events. [2024-06-27 17:47:38,556 INFO L125 PetriNetUnfolderBase]: For 72476/72476 co-relation queries the response was YES. [2024-06-27 17:47:38,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13896 conditions, 2127 events. 1261/2127 cut-off events. For 72476/72476 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 11962 event pairs, 198 based on Foata normal form. 9/2119 useless extension candidates. Maximal degree in co-relation 13785. Up to 1165 conditions per place. [2024-06-27 17:47:38,576 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 113 selfloop transitions, 79 changer transitions 0/199 dead transitions. [2024-06-27 17:47:38,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 199 transitions, 3531 flow [2024-06-27 17:47:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 17:47:38,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053475935828877 [2024-06-27 17:47:38,577 INFO L175 Difference]: Start difference. First operand has 189 places, 155 transitions, 2768 flow. Second operand 11 states and 189 transitions. [2024-06-27 17:47:38,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 199 transitions, 3531 flow [2024-06-27 17:47:38,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 199 transitions, 3379 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:47:38,681 INFO L231 Difference]: Finished difference. Result has 193 places, 156 transitions, 2807 flow [2024-06-27 17:47:38,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2807, PETRI_PLACES=193, PETRI_TRANSITIONS=156} [2024-06-27 17:47:38,682 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 158 predicate places. [2024-06-27 17:47:38,682 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 156 transitions, 2807 flow [2024-06-27 17:47:38,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:38,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:38,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:38,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:47:38,683 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:38,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1589589163, now seen corresponding path program 7 times [2024-06-27 17:47:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:38,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11802703] [2024-06-27 17:47:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:38,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:38,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11802703] [2024-06-27 17:47:38,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11802703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:38,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:38,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:38,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168356119] [2024-06-27 17:47:38,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:38,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:38,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:39,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:39,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 156 transitions, 2807 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:39,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:39,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:39,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:39,431 INFO L124 PetriNetUnfolderBase]: 1315/2217 cut-off events. [2024-06-27 17:47:39,432 INFO L125 PetriNetUnfolderBase]: For 77949/77949 co-relation queries the response was YES. [2024-06-27 17:47:39,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14437 conditions, 2217 events. 1315/2217 cut-off events. For 77949/77949 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12624 event pairs, 198 based on Foata normal form. 9/2209 useless extension candidates. Maximal degree in co-relation 14325. Up to 1256 conditions per place. [2024-06-27 17:47:39,452 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 109 selfloop transitions, 81 changer transitions 0/197 dead transitions. [2024-06-27 17:47:39,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 3460 flow [2024-06-27 17:47:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 17:47:39,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:39,453 INFO L175 Difference]: Start difference. First operand has 193 places, 156 transitions, 2807 flow. Second operand 11 states and 187 transitions. [2024-06-27 17:47:39,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 3460 flow [2024-06-27 17:47:39,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 197 transitions, 3300 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:39,560 INFO L231 Difference]: Finished difference. Result has 195 places, 157 transitions, 2842 flow [2024-06-27 17:47:39,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2842, PETRI_PLACES=195, PETRI_TRANSITIONS=157} [2024-06-27 17:47:39,561 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 160 predicate places. [2024-06-27 17:47:39,561 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 157 transitions, 2842 flow [2024-06-27 17:47:39,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:39,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:39,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:39,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:47:39,562 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:39,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1795320043, now seen corresponding path program 8 times [2024-06-27 17:47:39,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:39,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958006498] [2024-06-27 17:47:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:39,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:39,809 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 17:47:39,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:39,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958006498] [2024-06-27 17:47:39,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958006498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:39,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:39,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:39,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452321161] [2024-06-27 17:47:39,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:39,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:39,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:39,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:39,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:39,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:39,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 157 transitions, 2842 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:39,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:39,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:39,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:40,282 INFO L124 PetriNetUnfolderBase]: 1369/2307 cut-off events. [2024-06-27 17:47:40,282 INFO L125 PetriNetUnfolderBase]: For 81661/81666 co-relation queries the response was YES. [2024-06-27 17:47:40,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14966 conditions, 2307 events. 1369/2307 cut-off events. For 81661/81666 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 13268 event pairs, 240 based on Foata normal form. 13/2303 useless extension candidates. Maximal degree in co-relation 14853. Up to 1332 conditions per place. [2024-06-27 17:47:40,303 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 115 selfloop transitions, 79 changer transitions 0/201 dead transitions. [2024-06-27 17:47:40,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 201 transitions, 3521 flow [2024-06-27 17:47:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 17:47:40,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053475935828877 [2024-06-27 17:47:40,304 INFO L175 Difference]: Start difference. First operand has 195 places, 157 transitions, 2842 flow. Second operand 11 states and 189 transitions. [2024-06-27 17:47:40,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 201 transitions, 3521 flow [2024-06-27 17:47:40,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 201 transitions, 3357 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:40,417 INFO L231 Difference]: Finished difference. Result has 197 places, 158 transitions, 2869 flow [2024-06-27 17:47:40,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2680, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2869, PETRI_PLACES=197, PETRI_TRANSITIONS=158} [2024-06-27 17:47:40,418 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 162 predicate places. [2024-06-27 17:47:40,418 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 158 transitions, 2869 flow [2024-06-27 17:47:40,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:40,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:40,418 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 17:47:40,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:47:40,419 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:40,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:40,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1787992573, now seen corresponding path program 9 times [2024-06-27 17:47:40,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105317495] [2024-06-27 17:47:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:40,678 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 17:47:40,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:40,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105317495] [2024-06-27 17:47:40,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105317495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:40,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:40,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:40,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816528265] [2024-06-27 17:47:40,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:40,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:40,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:40,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:40,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:40,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:40,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 158 transitions, 2869 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:40,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:40,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:40,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:41,170 INFO L124 PetriNetUnfolderBase]: 1423/2397 cut-off events. [2024-06-27 17:47:41,170 INFO L125 PetriNetUnfolderBase]: For 86372/86377 co-relation queries the response was YES. [2024-06-27 17:47:41,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15489 conditions, 2397 events. 1423/2397 cut-off events. For 86372/86377 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 13965 event pairs, 240 based on Foata normal form. 13/2393 useless extension candidates. Maximal degree in co-relation 15375. Up to 1405 conditions per place. [2024-06-27 17:47:41,192 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 82 changer transitions 0/199 dead transitions. [2024-06-27 17:47:41,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 199 transitions, 3570 flow [2024-06-27 17:47:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 17:47:41,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:41,193 INFO L175 Difference]: Start difference. First operand has 197 places, 158 transitions, 2869 flow. Second operand 11 states and 187 transitions. [2024-06-27 17:47:41,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 199 transitions, 3570 flow [2024-06-27 17:47:41,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 199 transitions, 3410 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:41,309 INFO L231 Difference]: Finished difference. Result has 199 places, 159 transitions, 2906 flow [2024-06-27 17:47:41,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2711, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2906, PETRI_PLACES=199, PETRI_TRANSITIONS=159} [2024-06-27 17:47:41,310 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 164 predicate places. [2024-06-27 17:47:41,310 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 159 transitions, 2906 flow [2024-06-27 17:47:41,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:41,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:41,311 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 17:47:41,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:47:41,311 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:41,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1787997223, now seen corresponding path program 10 times [2024-06-27 17:47:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:41,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190789516] [2024-06-27 17:47:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:41,544 INFO 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 17:47:41,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:41,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190789516] [2024-06-27 17:47:41,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190789516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:41,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:41,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:41,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419038189] [2024-06-27 17:47:41,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:41,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:41,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:41,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:41,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:41,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:41,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 159 transitions, 2906 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:41,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:41,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:41,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:42,058 INFO L124 PetriNetUnfolderBase]: 1477/2487 cut-off events. [2024-06-27 17:47:42,059 INFO L125 PetriNetUnfolderBase]: For 91994/91994 co-relation queries the response was YES. [2024-06-27 17:47:42,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16027 conditions, 2487 events. 1477/2487 cut-off events. For 91994/91994 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 14613 event pairs, 234 based on Foata normal form. 9/2479 useless extension candidates. Maximal degree in co-relation 15912. Up to 1477 conditions per place. [2024-06-27 17:47:42,086 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 83 changer transitions 0/200 dead transitions. [2024-06-27 17:47:42,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 200 transitions, 3565 flow [2024-06-27 17:47:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 17:47:42,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:42,088 INFO L175 Difference]: Start difference. First operand has 199 places, 159 transitions, 2906 flow. Second operand 11 states and 187 transitions. [2024-06-27 17:47:42,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 200 transitions, 3565 flow [2024-06-27 17:47:42,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 200 transitions, 3402 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 17:47:42,220 INFO L231 Difference]: Finished difference. Result has 202 places, 160 transitions, 2942 flow [2024-06-27 17:47:42,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2745, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2942, PETRI_PLACES=202, PETRI_TRANSITIONS=160} [2024-06-27 17:47:42,220 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 167 predicate places. [2024-06-27 17:47:42,221 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 160 transitions, 2942 flow [2024-06-27 17:47:42,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:42,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:42,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:42,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:47:42,221 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:42,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2060737865, now seen corresponding path program 11 times [2024-06-27 17:47:42,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:42,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786348738] [2024-06-27 17:47:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:42,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:42,491 INFO 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 17:47:42,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:42,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786348738] [2024-06-27 17:47:42,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786348738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:42,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:42,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139276858] [2024-06-27 17:47:42,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:42,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:42,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:42,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:42,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 160 transitions, 2942 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:42,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:42,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:42,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:43,008 INFO L124 PetriNetUnfolderBase]: 1531/2573 cut-off events. [2024-06-27 17:47:43,009 INFO L125 PetriNetUnfolderBase]: For 95789/95795 co-relation queries the response was YES. [2024-06-27 17:47:43,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16558 conditions, 2573 events. 1531/2573 cut-off events. For 95789/95795 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 15234 event pairs, 279 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 16442. Up to 1548 conditions per place. [2024-06-27 17:47:43,030 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 112 selfloop transitions, 82 changer transitions 0/201 dead transitions. [2024-06-27 17:47:43,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 201 transitions, 3613 flow [2024-06-27 17:47:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-27 17:47:43,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49732620320855614 [2024-06-27 17:47:43,031 INFO L175 Difference]: Start difference. First operand has 202 places, 160 transitions, 2942 flow. Second operand 11 states and 186 transitions. [2024-06-27 17:47:43,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 201 transitions, 3613 flow [2024-06-27 17:47:43,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 201 transitions, 3445 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:43,156 INFO L231 Difference]: Finished difference. Result has 204 places, 161 transitions, 2971 flow [2024-06-27 17:47:43,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2971, PETRI_PLACES=204, PETRI_TRANSITIONS=161} [2024-06-27 17:47:43,157 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 169 predicate places. [2024-06-27 17:47:43,157 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 161 transitions, 2971 flow [2024-06-27 17:47:43,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:43,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:43,157 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 17:47:43,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:47:43,157 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:43,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:43,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1216537767, now seen corresponding path program 12 times [2024-06-27 17:47:43,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:43,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200426134] [2024-06-27 17:47:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:43,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:43,388 INFO 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 17:47:43,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:43,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200426134] [2024-06-27 17:47:43,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200426134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:43,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:43,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:43,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600436415] [2024-06-27 17:47:43,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:43,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:43,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:43,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:43,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:43,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 161 transitions, 2971 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:43,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:43,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:43,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:43,872 INFO L124 PetriNetUnfolderBase]: 1585/2663 cut-off events. [2024-06-27 17:47:43,873 INFO L125 PetriNetUnfolderBase]: For 100452/100452 co-relation queries the response was YES. [2024-06-27 17:47:43,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17081 conditions, 2663 events. 1585/2663 cut-off events. For 100452/100452 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 15968 event pairs, 279 based on Foata normal form. 9/2655 useless extension candidates. Maximal degree in co-relation 16964. Up to 1621 conditions per place. [2024-06-27 17:47:43,897 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 85 changer transitions 0/199 dead transitions. [2024-06-27 17:47:43,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 199 transitions, 3664 flow [2024-06-27 17:47:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 17:47:43,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-27 17:47:43,898 INFO L175 Difference]: Start difference. First operand has 204 places, 161 transitions, 2971 flow. Second operand 11 states and 184 transitions. [2024-06-27 17:47:43,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 199 transitions, 3664 flow [2024-06-27 17:47:44,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 199 transitions, 3498 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:44,076 INFO L231 Difference]: Finished difference. Result has 206 places, 162 transitions, 3008 flow [2024-06-27 17:47:44,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3008, PETRI_PLACES=206, PETRI_TRANSITIONS=162} [2024-06-27 17:47:44,076 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 171 predicate places. [2024-06-27 17:47:44,077 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 162 transitions, 3008 flow [2024-06-27 17:47:44,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:44,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:44,077 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 17:47:44,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:47:44,077 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:44,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2053415045, now seen corresponding path program 13 times [2024-06-27 17:47:44,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:44,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599580846] [2024-06-27 17:47:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:44,359 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 17:47:44,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:44,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599580846] [2024-06-27 17:47:44,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599580846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:44,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:44,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:44,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501609305] [2024-06-27 17:47:44,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:44,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:44,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:44,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:44,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:44,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:44,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 162 transitions, 3008 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:44,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:44,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:44,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:44,943 INFO L124 PetriNetUnfolderBase]: 1639/2753 cut-off events. [2024-06-27 17:47:44,943 INFO L125 PetriNetUnfolderBase]: For 105155/105161 co-relation queries the response was YES. [2024-06-27 17:47:44,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17619 conditions, 2753 events. 1639/2753 cut-off events. For 105155/105161 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 16564 event pairs, 297 based on Foata normal form. 15/2751 useless extension candidates. Maximal degree in co-relation 17501. Up to 1693 conditions per place. [2024-06-27 17:47:44,970 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 86 changer transitions 0/200 dead transitions. [2024-06-27 17:47:44,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 200 transitions, 3659 flow [2024-06-27 17:47:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 17:47:44,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-27 17:47:44,972 INFO L175 Difference]: Start difference. First operand has 206 places, 162 transitions, 3008 flow. Second operand 11 states and 184 transitions. [2024-06-27 17:47:44,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 200 transitions, 3659 flow [2024-06-27 17:47:45,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 200 transitions, 3487 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:45,176 INFO L231 Difference]: Finished difference. Result has 208 places, 163 transitions, 3041 flow [2024-06-27 17:47:45,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3041, PETRI_PLACES=208, PETRI_TRANSITIONS=163} [2024-06-27 17:47:45,177 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 173 predicate places. [2024-06-27 17:47:45,177 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 163 transitions, 3041 flow [2024-06-27 17:47:45,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:45,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:45,177 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 17:47:45,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:47:45,178 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:45,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1854887015, now seen corresponding path program 14 times [2024-06-27 17:47:45,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:45,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633478852] [2024-06-27 17:47:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:45,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:45,439 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 17:47:45,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:45,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633478852] [2024-06-27 17:47:45,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633478852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:45,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:45,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:45,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983447004] [2024-06-27 17:47:45,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:45,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:45,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:45,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:45,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:45,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 163 transitions, 3041 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:45,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:45,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:45,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:45,952 INFO L124 PetriNetUnfolderBase]: 1693/2843 cut-off events. [2024-06-27 17:47:45,952 INFO L125 PetriNetUnfolderBase]: For 108671/108671 co-relation queries the response was YES. [2024-06-27 17:47:45,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18151 conditions, 2843 events. 1693/2843 cut-off events. For 108671/108671 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 17216 event pairs, 309 based on Foata normal form. 9/2835 useless extension candidates. Maximal degree in co-relation 18032. Up to 1741 conditions per place. [2024-06-27 17:47:45,979 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 87 changer transitions 0/204 dead transitions. [2024-06-27 17:47:45,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 204 transitions, 3806 flow [2024-06-27 17:47:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-27 17:47:45,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49732620320855614 [2024-06-27 17:47:45,980 INFO L175 Difference]: Start difference. First operand has 208 places, 163 transitions, 3041 flow. Second operand 11 states and 186 transitions. [2024-06-27 17:47:45,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 204 transitions, 3806 flow [2024-06-27 17:47:46,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 204 transitions, 3635 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 17:47:46,128 INFO L231 Difference]: Finished difference. Result has 211 places, 164 transitions, 3077 flow [2024-06-27 17:47:46,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3077, PETRI_PLACES=211, PETRI_TRANSITIONS=164} [2024-06-27 17:47:46,129 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 176 predicate places. [2024-06-27 17:47:46,129 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 164 transitions, 3077 flow [2024-06-27 17:47:46,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:46,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:46,129 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 17:47:46,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:47:46,129 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:46,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:46,130 INFO L85 PathProgramCache]: Analyzing trace with hash 935607463, now seen corresponding path program 15 times [2024-06-27 17:47:46,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:46,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146182666] [2024-06-27 17:47:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:46,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:46,422 INFO 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 17:47:46,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:46,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146182666] [2024-06-27 17:47:46,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146182666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:46,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:46,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608151417] [2024-06-27 17:47:46,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:46,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:46,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:46,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:46,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 164 transitions, 3077 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:46,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:46,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:46,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:47,060 INFO L124 PetriNetUnfolderBase]: 1747/2933 cut-off events. [2024-06-27 17:47:47,060 INFO L125 PetriNetUnfolderBase]: For 114549/114549 co-relation queries the response was YES. [2024-06-27 17:47:47,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18692 conditions, 2933 events. 1747/2933 cut-off events. For 114549/114549 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 17954 event pairs, 333 based on Foata normal form. 9/2925 useless extension candidates. Maximal degree in co-relation 18572. Up to 1832 conditions per place. [2024-06-27 17:47:47,089 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 106 selfloop transitions, 89 changer transitions 0/202 dead transitions. [2024-06-27 17:47:47,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 202 transitions, 3776 flow [2024-06-27 17:47:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:47,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 17:47:47,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-27 17:47:47,090 INFO L175 Difference]: Start difference. First operand has 211 places, 164 transitions, 3077 flow. Second operand 11 states and 184 transitions. [2024-06-27 17:47:47,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 202 transitions, 3776 flow [2024-06-27 17:47:47,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 202 transitions, 3600 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:47,249 INFO L231 Difference]: Finished difference. Result has 213 places, 165 transitions, 3112 flow [2024-06-27 17:47:47,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3112, PETRI_PLACES=213, PETRI_TRANSITIONS=165} [2024-06-27 17:47:47,249 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 178 predicate places. [2024-06-27 17:47:47,249 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 165 transitions, 3112 flow [2024-06-27 17:47:47,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:47,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:47,249 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 17:47:47,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:47:47,250 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:47,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash 935612113, now seen corresponding path program 16 times [2024-06-27 17:47:47,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:47,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308081151] [2024-06-27 17:47:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:47,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:47,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:47,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308081151] [2024-06-27 17:47:47,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308081151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:47,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:47,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:47,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513723344] [2024-06-27 17:47:47,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:47,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:47,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:47,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:47,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 165 transitions, 3112 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:47,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:47,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:47,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:48,057 INFO L124 PetriNetUnfolderBase]: 1801/3023 cut-off events. [2024-06-27 17:47:48,058 INFO L125 PetriNetUnfolderBase]: For 120542/120548 co-relation queries the response was YES. [2024-06-27 17:47:48,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19221 conditions, 3023 events. 1801/3023 cut-off events. For 120542/120548 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 18596 event pairs, 327 based on Foata normal form. 15/3021 useless extension candidates. Maximal degree in co-relation 19100. Up to 1904 conditions per place. [2024-06-27 17:47:48,083 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 106 selfloop transitions, 90 changer transitions 0/203 dead transitions. [2024-06-27 17:47:48,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 203 transitions, 3769 flow [2024-06-27 17:47:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 17:47:48,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-27 17:47:48,084 INFO L175 Difference]: Start difference. First operand has 213 places, 165 transitions, 3112 flow. Second operand 11 states and 184 transitions. [2024-06-27 17:47:48,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 203 transitions, 3769 flow [2024-06-27 17:47:48,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 203 transitions, 3592 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 17:47:48,259 INFO L231 Difference]: Finished difference. Result has 216 places, 166 transitions, 3148 flow [2024-06-27 17:47:48,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3148, PETRI_PLACES=216, PETRI_TRANSITIONS=166} [2024-06-27 17:47:48,259 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 181 predicate places. [2024-06-27 17:47:48,259 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 166 transitions, 3148 flow [2024-06-27 17:47:48,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:48,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:48,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:48,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:47:48,260 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:48,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash 341799513, now seen corresponding path program 17 times [2024-06-27 17:47:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:48,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505342243] [2024-06-27 17:47:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:48,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:48,549 INFO 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 17:47:48,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:48,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505342243] [2024-06-27 17:47:48,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505342243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:48,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:48,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:48,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379173487] [2024-06-27 17:47:48,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:48,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:48,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:48,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:48,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 166 transitions, 3148 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:48,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:48,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:48,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:49,139 INFO L124 PetriNetUnfolderBase]: 1855/3113 cut-off events. [2024-06-27 17:47:49,139 INFO L125 PetriNetUnfolderBase]: For 125466/125472 co-relation queries the response was YES. [2024-06-27 17:47:49,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19756 conditions, 3113 events. 1855/3113 cut-off events. For 125466/125472 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 19316 event pairs, 369 based on Foata normal form. 9/3105 useless extension candidates. Maximal degree in co-relation 19634. Up to 1980 conditions per place. [2024-06-27 17:47:49,170 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 109 selfloop transitions, 91 changer transitions 0/207 dead transitions. [2024-06-27 17:47:49,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 207 transitions, 3831 flow [2024-06-27 17:47:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 17:47:49,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:47:49,171 INFO L175 Difference]: Start difference. First operand has 216 places, 166 transitions, 3148 flow. Second operand 11 states and 187 transitions. [2024-06-27 17:47:49,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 207 transitions, 3831 flow [2024-06-27 17:47:49,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 207 transitions, 3649 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:49,364 INFO L231 Difference]: Finished difference. Result has 218 places, 167 transitions, 3181 flow [2024-06-27 17:47:49,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3181, PETRI_PLACES=218, PETRI_TRANSITIONS=167} [2024-06-27 17:47:49,365 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 183 predicate places. [2024-06-27 17:47:49,365 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 167 transitions, 3181 flow [2024-06-27 17:47:49,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:49,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:49,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:49,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:47:49,365 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:49,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:49,366 INFO L85 PathProgramCache]: Analyzing trace with hash 334476693, now seen corresponding path program 18 times [2024-06-27 17:47:49,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:49,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376231816] [2024-06-27 17:47:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:49,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:49,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:49,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376231816] [2024-06-27 17:47:49,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376231816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:49,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:49,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:49,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305861031] [2024-06-27 17:47:49,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:49,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:49,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:49,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:49,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:49,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 167 transitions, 3181 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:49,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:49,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:49,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:50,185 INFO L124 PetriNetUnfolderBase]: 1909/3203 cut-off events. [2024-06-27 17:47:50,186 INFO L125 PetriNetUnfolderBase]: For 130317/130323 co-relation queries the response was YES. [2024-06-27 17:47:50,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20288 conditions, 3203 events. 1909/3203 cut-off events. For 130317/130323 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 20050 event pairs, 345 based on Foata normal form. 9/3195 useless extension candidates. Maximal degree in co-relation 20165. Up to 2053 conditions per place. [2024-06-27 17:47:50,219 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 104 selfloop transitions, 94 changer transitions 0/205 dead transitions. [2024-06-27 17:47:50,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 205 transitions, 3842 flow [2024-06-27 17:47:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 17:47:50,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946524064171123 [2024-06-27 17:47:50,221 INFO L175 Difference]: Start difference. First operand has 218 places, 167 transitions, 3181 flow. Second operand 11 states and 185 transitions. [2024-06-27 17:47:50,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 205 transitions, 3842 flow [2024-06-27 17:47:50,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 205 transitions, 3658 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:50,410 INFO L231 Difference]: Finished difference. Result has 220 places, 168 transitions, 3218 flow [2024-06-27 17:47:50,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3218, PETRI_PLACES=220, PETRI_TRANSITIONS=168} [2024-06-27 17:47:50,410 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 185 predicate places. [2024-06-27 17:47:50,411 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 168 transitions, 3218 flow [2024-06-27 17:47:50,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:50,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:50,411 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 17:47:50,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:47:50,411 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:50,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:50,411 INFO L85 PathProgramCache]: Analyzing trace with hash 591150183, now seen corresponding path program 19 times [2024-06-27 17:47:50,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:50,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918022796] [2024-06-27 17:47:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:50,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:50,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:50,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918022796] [2024-06-27 17:47:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918022796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:50,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:50,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:50,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981204128] [2024-06-27 17:47:50,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:50,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:50,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:50,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:50,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:50,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:50,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 168 transitions, 3218 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:50,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:50,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:50,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:51,290 INFO L124 PetriNetUnfolderBase]: 1963/3296 cut-off events. [2024-06-27 17:47:51,290 INFO L125 PetriNetUnfolderBase]: For 133921/133927 co-relation queries the response was YES. [2024-06-27 17:47:51,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20829 conditions, 3296 events. 1963/3296 cut-off events. For 133921/133927 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 20782 event pairs, 381 based on Foata normal form. 9/3288 useless extension candidates. Maximal degree in co-relation 20705. Up to 2124 conditions per place. [2024-06-27 17:47:51,319 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 93 changer transitions 0/207 dead transitions. [2024-06-27 17:47:51,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 207 transitions, 3897 flow [2024-06-27 17:47:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 17:47:51,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48663101604278075 [2024-06-27 17:47:51,321 INFO L175 Difference]: Start difference. First operand has 220 places, 168 transitions, 3218 flow. Second operand 11 states and 182 transitions. [2024-06-27 17:47:51,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 207 transitions, 3897 flow [2024-06-27 17:47:51,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 207 transitions, 3707 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:47:51,521 INFO L231 Difference]: Finished difference. Result has 222 places, 169 transitions, 3247 flow [2024-06-27 17:47:51,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3247, PETRI_PLACES=222, PETRI_TRANSITIONS=169} [2024-06-27 17:47:51,522 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 187 predicate places. [2024-06-27 17:47:51,522 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 169 transitions, 3247 flow [2024-06-27 17:47:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:51,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:51,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:51,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:47:51,522 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:51,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash 334472043, now seen corresponding path program 20 times [2024-06-27 17:47:51,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:51,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759875762] [2024-06-27 17:47:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:51,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:51,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:51,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759875762] [2024-06-27 17:47:51,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759875762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:51,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:51,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:47:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353525736] [2024-06-27 17:47:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:51,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:47:51,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:51,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:47:51,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:47:51,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 17:47:51,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 169 transitions, 3247 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:51,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:51,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 17:47:51,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:52,340 INFO L124 PetriNetUnfolderBase]: 1945/3266 cut-off events. [2024-06-27 17:47:52,341 INFO L125 PetriNetUnfolderBase]: For 123664/123670 co-relation queries the response was YES. [2024-06-27 17:47:52,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20239 conditions, 3266 events. 1945/3266 cut-off events. For 123664/123670 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 20578 event pairs, 357 based on Foata normal form. 9/3258 useless extension candidates. Maximal degree in co-relation 20114. Up to 2098 conditions per place. [2024-06-27 17:47:52,374 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 103 selfloop transitions, 95 changer transitions 0/205 dead transitions. [2024-06-27 17:47:52,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 205 transitions, 3821 flow [2024-06-27 17:47:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:47:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:47:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 17:47:52,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-27 17:47:52,377 INFO L175 Difference]: Start difference. First operand has 222 places, 169 transitions, 3247 flow. Second operand 11 states and 184 transitions. [2024-06-27 17:47:52,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 205 transitions, 3821 flow [2024-06-27 17:47:52,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 205 transitions, 3540 flow, removed 0 selfloop flow, removed 40 redundant places. [2024-06-27 17:47:52,609 INFO L231 Difference]: Finished difference. Result has 191 places, 168 transitions, 3054 flow [2024-06-27 17:47:52,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3054, PETRI_PLACES=191, PETRI_TRANSITIONS=168} [2024-06-27 17:47:52,609 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 156 predicate places. [2024-06-27 17:47:52,609 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 168 transitions, 3054 flow [2024-06-27 17:47:52,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:52,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:52,610 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:52,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:47:52,610 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:52,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2008323973, now seen corresponding path program 2 times [2024-06-27 17:47:52,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:52,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818880986] [2024-06-27 17:47:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:52,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:52,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818880986] [2024-06-27 17:47:52,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818880986] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:52,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491420978] [2024-06-27 17:47:52,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:47:52,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:52,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:52,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:47:52,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:47:52,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:47:52,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:47:52,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:52,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:52,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491420978] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:52,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:52,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-06-27 17:47:52,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861270920] [2024-06-27 17:47:52,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:52,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:47:52,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:52,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:47:52,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:47:52,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 17:47:52,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 168 transitions, 3054 flow. Second operand has 13 states, 13 states have (on average 16.692307692307693) internal successors, (217), 13 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:52,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:52,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 17:47:52,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:53,197 INFO L124 PetriNetUnfolderBase]: 1540/2812 cut-off events. [2024-06-27 17:47:53,197 INFO L125 PetriNetUnfolderBase]: For 100168/100460 co-relation queries the response was YES. [2024-06-27 17:47:53,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17938 conditions, 2812 events. 1540/2812 cut-off events. For 100168/100460 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 18333 event pairs, 638 based on Foata normal form. 105/2775 useless extension candidates. Maximal degree in co-relation 17846. Up to 1416 conditions per place. [2024-06-27 17:47:53,228 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 122 selfloop transitions, 79 changer transitions 0/232 dead transitions. [2024-06-27 17:47:53,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 232 transitions, 4276 flow [2024-06-27 17:47:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:47:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:47:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 273 transitions. [2024-06-27 17:47:53,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6691176470588235 [2024-06-27 17:47:53,229 INFO L175 Difference]: Start difference. First operand has 191 places, 168 transitions, 3054 flow. Second operand 12 states and 273 transitions. [2024-06-27 17:47:53,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 232 transitions, 4276 flow [2024-06-27 17:47:53,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 232 transitions, 3259 flow, removed 0 selfloop flow, removed 22 redundant places. [2024-06-27 17:47:53,367 INFO L231 Difference]: Finished difference. Result has 186 places, 174 transitions, 2257 flow [2024-06-27 17:47:53,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2257, PETRI_PLACES=186, PETRI_TRANSITIONS=174} [2024-06-27 17:47:53,367 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 151 predicate places. [2024-06-27 17:47:53,367 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 174 transitions, 2257 flow [2024-06-27 17:47:53,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.692307692307693) internal successors, (217), 13 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:53,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:53,368 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:53,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 17:47:53,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-06-27 17:47:53,569 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:53,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash -198724229, now seen corresponding path program 3 times [2024-06-27 17:47:53,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:53,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414303163] [2024-06-27 17:47:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:53,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:53,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:53,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414303163] [2024-06-27 17:47:53,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414303163] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448740915] [2024-06-27 17:47:53,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:47:53,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:53,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:53,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:53,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:47:53,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-06-27 17:47:53,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:47:53,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:47:53,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:53,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:53,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448740915] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:53,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:53,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-06-27 17:47:53,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769258440] [2024-06-27 17:47:53,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:53,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:47:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:47:53,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:47:53,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 17:47:53,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 174 transitions, 2257 flow. Second operand has 15 states, 15 states have (on average 16.666666666666668) internal successors, (250), 15 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:53,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:53,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 17:47:53,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:54,302 INFO L124 PetriNetUnfolderBase]: 1588/2890 cut-off events. [2024-06-27 17:47:54,303 INFO L125 PetriNetUnfolderBase]: For 70415/70709 co-relation queries the response was YES. [2024-06-27 17:47:54,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18064 conditions, 2890 events. 1588/2890 cut-off events. For 70415/70709 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 18588 event pairs, 638 based on Foata normal form. 45/2791 useless extension candidates. Maximal degree in co-relation 17981. Up to 1416 conditions per place. [2024-06-27 17:47:54,378 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 134 selfloop transitions, 81 changer transitions 0/246 dead transitions. [2024-06-27 17:47:54,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 246 transitions, 3647 flow [2024-06-27 17:47:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 17:47:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 17:47:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 313 transitions. [2024-06-27 17:47:54,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657563025210084 [2024-06-27 17:47:54,380 INFO L175 Difference]: Start difference. First operand has 186 places, 174 transitions, 2257 flow. Second operand 14 states and 313 transitions. [2024-06-27 17:47:54,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 246 transitions, 3647 flow [2024-06-27 17:47:54,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 246 transitions, 3434 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-27 17:47:54,525 INFO L231 Difference]: Finished difference. Result has 188 places, 176 transitions, 2232 flow [2024-06-27 17:47:54,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2232, PETRI_PLACES=188, PETRI_TRANSITIONS=176} [2024-06-27 17:47:54,525 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 153 predicate places. [2024-06-27 17:47:54,525 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 176 transitions, 2232 flow [2024-06-27 17:47:54,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.666666666666668) internal successors, (250), 15 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:54,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:54,526 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:54,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 17:47:54,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:54,727 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:47:54,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1490134139, now seen corresponding path program 4 times [2024-06-27 17:47:54,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:54,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361039041] [2024-06-27 17:47:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:54,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:55,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:55,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361039041] [2024-06-27 17:47:55,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361039041] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:55,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732853526] [2024-06-27 17:47:55,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:47:55,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:55,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:55,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:55,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:47:55,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:47:55,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:47:55,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 17:47:55,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:56,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:56,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732853526] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:56,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:56,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 54 [2024-06-27 17:47:56,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167070608] [2024-06-27 17:47:56,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:56,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-06-27 17:47:56,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:56,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-06-27 17:47:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2550, Unknown=0, NotChecked=0, Total=2970 [2024-06-27 17:47:57,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-06-27 17:47:57,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 176 transitions, 2232 flow. Second operand has 55 states, 55 states have (on average 9.418181818181818) internal successors, (518), 55 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:47:57,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:57,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-06-27 17:47:57,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:48:14,739 INFO L124 PetriNetUnfolderBase]: 22561/36899 cut-off events. [2024-06-27 17:48:14,739 INFO L125 PetriNetUnfolderBase]: For 668898/668903 co-relation queries the response was YES. [2024-06-27 17:48:15,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212090 conditions, 36899 events. 22561/36899 cut-off events. For 668898/668903 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 263765 event pairs, 455 based on Foata normal form. 0/36614 useless extension candidates. Maximal degree in co-relation 212003. Up to 11155 conditions per place. [2024-06-27 17:48:15,215 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 680 selfloop transitions, 877 changer transitions 613/2174 dead transitions. [2024-06-27 17:48:15,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 2174 transitions, 28192 flow [2024-06-27 17:48:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2024-06-27 17:48:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2024-06-27 17:48:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 2545 transitions. [2024-06-27 17:48:15,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829222011385199 [2024-06-27 17:48:15,219 INFO L175 Difference]: Start difference. First operand has 188 places, 176 transitions, 2232 flow. Second operand 155 states and 2545 transitions. [2024-06-27 17:48:15,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 2174 transitions, 28192 flow [2024-06-27 17:48:16,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 2174 transitions, 26581 flow, removed 150 selfloop flow, removed 12 redundant places. [2024-06-27 17:48:16,511 INFO L231 Difference]: Finished difference. Result has 392 places, 1015 transitions, 12919 flow [2024-06-27 17:48:16,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=155, PETRI_FLOW=12919, PETRI_PLACES=392, PETRI_TRANSITIONS=1015} [2024-06-27 17:48:16,511 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 357 predicate places. [2024-06-27 17:48:16,512 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1015 transitions, 12919 flow [2024-06-27 17:48:16,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 9.418181818181818) internal successors, (518), 55 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:48:16,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:48:16,513 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:48:16,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 17:48:16,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:48:16,713 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:48:16,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:48:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1910488281, now seen corresponding path program 1 times [2024-06-27 17:48:16,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:48:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907485873] [2024-06-27 17:48:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:48:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:17,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:48:17,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907485873] [2024-06-27 17:48:17,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907485873] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:48:17,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468960095] [2024-06-27 17:48:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:48:17,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:48:17,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:48:17,503 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:48:17,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 17:48:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:48:17,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 49 conjunts are in the unsatisfiable core [2024-06-27 17:48:17,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:48:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:18,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:48:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:48:19,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468960095] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:48:19,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:48:19,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2024-06-27 17:48:19,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203686368] [2024-06-27 17:48:19,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:48:19,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-06-27 17:48:19,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:48:19,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-06-27 17:48:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=3335, Unknown=0, NotChecked=0, Total=3782 [2024-06-27 17:48:20,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-06-27 17:48:20,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1015 transitions, 12919 flow. Second operand has 62 states, 62 states have (on average 9.451612903225806) internal successors, (586), 62 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:48:20,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:48:20,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-06-27 17:48:20,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand