./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/fib_unsafe-7.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_unsafe-7.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/fib_unsafe-7.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 [2024-06-28 01:12:59,133 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:12:59,205 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:12:59,209 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:12:59,209 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:12:59,232 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:12:59,232 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:12:59,232 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:12:59,233 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:12:59,236 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:12:59,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:12:59,237 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:12:59,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:12:59,238 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:12:59,238 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:12:59,238 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:12:59,239 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:12:59,239 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:12:59,239 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:12:59,239 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:12:59,239 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:12:59,240 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:12:59,240 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:12:59,240 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:12:59,241 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:12:59,241 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:12:59,241 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:12:59,241 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:12:59,242 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:12:59,242 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:12:59,243 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:12:59,243 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:12:59,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:12:59,243 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:12:59,244 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:12:59,244 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:12:59,244 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:12:59,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:12:59,244 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:12:59,244 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:12:59,245 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:12:59,245 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:12:59,245 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:12:59,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:12:59,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:12:59,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:12:59,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:12:59,459 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:12:59,459 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:12:59,460 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i [2024-06-28 01:13:00,495 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:13:00,707 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:13:00,712 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-7.i [2024-06-28 01:13:00,723 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75f470f2d/c98d39881ea4495aa23caef4091a01b0/FLAGd74b23039 [2024-06-28 01:13:00,737 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75f470f2d/c98d39881ea4495aa23caef4091a01b0 [2024-06-28 01:13:00,739 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:13:00,740 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:13:00,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/fib_unsafe-7.yml/witness.yml [2024-06-28 01:13:00,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:13:00,850 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:13:00,851 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:13:00,851 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:13:00,854 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:13:00,855 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:13:00" (1/2) ... [2024-06-28 01:13:00,856 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae2d265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:13:00, skipping insertion in model container [2024-06-28 01:13:00,856 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:13:00" (1/2) ... [2024-06-28 01:13:00,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@22fe5eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:13:00, skipping insertion in model container [2024-06-28 01:13:00,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:13:00" (2/2) ... [2024-06-28 01:13:00,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae2d265 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:00, skipping insertion in model container [2024-06-28 01:13:00,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:13:00" (2/2) ... [2024-06-28 01:13:00,859 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:13:00,898 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:13:00,900 INFO L97 edCorrectnessWitness]: Location invariant before [L721-L721] ((((((((! multithreaded || 0 <= cur) && (! multithreaded || 0 <= next)) && (! multithreaded || 1 <= i)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= q)) && (! multithreaded || (1 <= i && 1 <= j))) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 1 <= j) [2024-06-28 01:13:00,900 INFO L97 edCorrectnessWitness]: Location invariant before [L722-L722] ((((((((! multithreaded || 0 <= cur) && (! multithreaded || 0 <= next)) && (! multithreaded || 1 <= i)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= q)) && (! multithreaded || (1 <= i && 1 <= j))) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 1 <= j) [2024-06-28 01:13:00,900 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:13:00,900 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-06-28 01:13:00,944 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:13:01,218 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_unsafe-7.i[30243,30256] [2024-06-28 01:13:01,232 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:13:01,238 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 01:13:01,281 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_unsafe-7.i[30243,30256] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:13:01,294 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:13:01,320 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:13:01,320 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01 WrapperNode [2024-06-28 01:13:01,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:13:01,321 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:13:01,322 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:13:01,322 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:13:01,327 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 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,349 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 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,376 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-06-28 01:13:01,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:13:01,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:13:01,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:13:01,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:13:01,385 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,397 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,421 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]. [2024-06-28 01:13:01,421 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,421 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,424 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,426 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,428 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,429 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,431 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:13:01,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:13:01,432 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:13:01,432 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:13:01,432 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (1/1) ... [2024-06-28 01:13:01,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:13:01,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:13:01,454 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) [2024-06-28 01:13:01,471 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 [2024-06-28 01:13:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-28 01:13:01,483 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-28 01:13:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-28 01:13:01,483 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-28 01:13:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:13:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:13:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:13:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:13:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:13:01,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:13:01,485 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:13:01,585 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:13:01,586 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:13:01,740 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:13:01,740 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:13:01,810 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:13:01,811 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-28 01:13:01,811 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:13:01 BoogieIcfgContainer [2024-06-28 01:13:01,811 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:13:01,813 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:13:01,813 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:13:01,815 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:13:01,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:13:00" (1/4) ... [2024-06-28 01:13:01,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de01a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:13:01, skipping insertion in model container [2024-06-28 01:13:01,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:13:00" (2/4) ... [2024-06-28 01:13:01,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de01a7f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:13:01, skipping insertion in model container [2024-06-28 01:13:01,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:13:01" (3/4) ... [2024-06-28 01:13:01,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de01a7f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:13:01, skipping insertion in model container [2024-06-28 01:13:01,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:13:01" (4/4) ... [2024-06-28 01:13:01,817 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2024-06-28 01:13:01,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:13:01,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 01:13:01,834 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:13:01,873 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 01:13:01,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 34 transitions, 76 flow [2024-06-28 01:13:01,920 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-06-28 01:13:01,921 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:13:01,923 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. [2024-06-28 01:13:01,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 34 transitions, 76 flow [2024-06-28 01:13:01,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 70 flow [2024-06-28 01:13:01,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:13:01,937 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;@6986d3b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:13:01,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-28 01:13:01,941 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:13:01,941 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-28 01:13:01,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:13:01,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:01,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:01,942 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)] === [2024-06-28 01:13:01,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:01,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1002670089, now seen corresponding path program 1 times [2024-06-28 01:13:01,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:01,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001343334] [2024-06-28 01:13:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:01,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:02,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:02,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001343334] [2024-06-28 01:13:02,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001343334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:02,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:02,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:13:02,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681875960] [2024-06-28 01:13:02,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:02,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:13:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:02,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:13:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:13:02,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:02,471 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) [2024-06-28 01:13:02,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:02,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:02,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:02,635 INFO L124 PetriNetUnfolderBase]: 354/619 cut-off events. [2024-06-28 01:13:02,635 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-28 01:13:02,639 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. [2024-06-28 01:13:02,643 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 41 selfloop transitions, 11 changer transitions 1/60 dead transitions. [2024-06-28 01:13:02,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 235 flow [2024-06-28 01:13:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:13:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:13:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-28 01:13:02,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2024-06-28 01:13:02,656 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 70 flow. Second operand 5 states and 106 transitions. [2024-06-28 01:13:02,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 235 flow [2024-06-28 01:13:02,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 60 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:13:02,663 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 142 flow [2024-06-28 01:13:02,664 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} [2024-06-28 01:13:02,670 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-06-28 01:13:02,670 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 142 flow [2024-06-28 01:13:02,671 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) [2024-06-28 01:13:02,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:02,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:02,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:13:02,671 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)] === [2024-06-28 01:13:02,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash -936565413, now seen corresponding path program 1 times [2024-06-28 01:13:02,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:02,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303886365] [2024-06-28 01:13:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:02,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:03,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:03,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303886365] [2024-06-28 01:13:03,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303886365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:03,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:03,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:13:03,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438103783] [2024-06-28 01:13:03,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:03,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:13:03,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:03,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:13:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:13:03,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:03,098 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) [2024-06-28 01:13:03,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:03,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:03,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:03,220 INFO L124 PetriNetUnfolderBase]: 322/569 cut-off events. [2024-06-28 01:13:03,221 INFO L125 PetriNetUnfolderBase]: For 236/236 co-relation queries the response was YES. [2024-06-28 01:13:03,221 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. [2024-06-28 01:13:03,224 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 51 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-06-28 01:13:03,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 380 flow [2024-06-28 01:13:03,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:13:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:13:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 01:13:03,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630252100840336 [2024-06-28 01:13:03,229 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 142 flow. Second operand 7 states and 134 transitions. [2024-06-28 01:13:03,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 380 flow [2024-06-28 01:13:03,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 75 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 01:13:03,234 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 224 flow [2024-06-28 01:13:03,234 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} [2024-06-28 01:13:03,235 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2024-06-28 01:13:03,235 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 224 flow [2024-06-28 01:13:03,235 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) [2024-06-28 01:13:03,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:03,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:03,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:13:03,236 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)] === [2024-06-28 01:13:03,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash 544161191, now seen corresponding path program 1 times [2024-06-28 01:13:03,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:03,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062733190] [2024-06-28 01:13:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:03,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:03,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062733190] [2024-06-28 01:13:03,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062733190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:03,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:03,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:13:03,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579016497] [2024-06-28 01:13:03,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:03,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:13:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:13:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:13:03,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:03,533 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) [2024-06-28 01:13:03,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:03,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:03,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:03,665 INFO L124 PetriNetUnfolderBase]: 307/544 cut-off events. [2024-06-28 01:13:03,665 INFO L125 PetriNetUnfolderBase]: For 512/515 co-relation queries the response was YES. [2024-06-28 01:13:03,667 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. [2024-06-28 01:13:03,669 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 54 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-28 01:13:03,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 481 flow [2024-06-28 01:13:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:13:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:13:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 01:13:03,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404411764705882 [2024-06-28 01:13:03,673 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 224 flow. Second operand 8 states and 147 transitions. [2024-06-28 01:13:03,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 481 flow [2024-06-28 01:13:03,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 80 transitions, 449 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 01:13:03,679 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 244 flow [2024-06-28 01:13:03,679 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} [2024-06-28 01:13:03,680 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2024-06-28 01:13:03,681 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 244 flow [2024-06-28 01:13:03,681 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) [2024-06-28 01:13:03,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:03,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:03,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:13:03,682 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)] === [2024-06-28 01:13:03,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:03,683 INFO L85 PathProgramCache]: Analyzing trace with hash 587817960, now seen corresponding path program 1 times [2024-06-28 01:13:03,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:03,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448909673] [2024-06-28 01:13:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:03,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:03,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:03,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448909673] [2024-06-28 01:13:03,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448909673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:03,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:03,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:13:03,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102995855] [2024-06-28 01:13:03,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:03,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:13:03,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:03,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:13:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:13:03,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:03,935 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) [2024-06-28 01:13:03,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:03,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:03,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:04,062 INFO L124 PetriNetUnfolderBase]: 373/652 cut-off events. [2024-06-28 01:13:04,062 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-06-28 01:13:04,063 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. [2024-06-28 01:13:04,065 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 51 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2024-06-28 01:13:04,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 79 transitions, 538 flow [2024-06-28 01:13:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:13:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:13:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 01:13:04,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2024-06-28 01:13:04,067 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 244 flow. Second operand 7 states and 128 transitions. [2024-06-28 01:13:04,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 79 transitions, 538 flow [2024-06-28 01:13:04,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 494 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:13:04,071 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 323 flow [2024-06-28 01:13:04,071 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} [2024-06-28 01:13:04,073 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 20 predicate places. [2024-06-28 01:13:04,073 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 323 flow [2024-06-28 01:13:04,073 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) [2024-06-28 01:13:04,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:04,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:04,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:13:04,074 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)] === [2024-06-28 01:13:04,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash 460670153, now seen corresponding path program 1 times [2024-06-28 01:13:04,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:04,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297267579] [2024-06-28 01:13:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:04,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:04,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:04,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297267579] [2024-06-28 01:13:04,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297267579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:04,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:04,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:13:04,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288045554] [2024-06-28 01:13:04,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:04,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:13:04,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:04,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:13:04,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:13:04,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:04,316 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) [2024-06-28 01:13:04,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:04,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:04,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:04,460 INFO L124 PetriNetUnfolderBase]: 355/621 cut-off events. [2024-06-28 01:13:04,460 INFO L125 PetriNetUnfolderBase]: For 1110/1110 co-relation queries the response was YES. [2024-06-28 01:13:04,461 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. [2024-06-28 01:13:04,464 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 50 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-06-28 01:13:04,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 567 flow [2024-06-28 01:13:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:13:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:13:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 01:13:04,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2024-06-28 01:13:04,465 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 323 flow. Second operand 8 states and 134 transitions. [2024-06-28 01:13:04,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 567 flow [2024-06-28 01:13:04,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 560 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:13:04,468 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 363 flow [2024-06-28 01:13:04,469 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} [2024-06-28 01:13:04,469 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 27 predicate places. [2024-06-28 01:13:04,469 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 363 flow [2024-06-28 01:13:04,470 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) [2024-06-28 01:13:04,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:04,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:04,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 01:13:04,470 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)] === [2024-06-28 01:13:04,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1780842470, now seen corresponding path program 1 times [2024-06-28 01:13:04,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:04,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991381335] [2024-06-28 01:13:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:04,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:04,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991381335] [2024-06-28 01:13:04,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991381335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:04,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:04,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:13:04,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134200926] [2024-06-28 01:13:04,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:04,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:13:04,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:04,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:13:04,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:13:04,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:04,746 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) [2024-06-28 01:13:04,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:04,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:04,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:04,875 INFO L124 PetriNetUnfolderBase]: 367/640 cut-off events. [2024-06-28 01:13:04,875 INFO L125 PetriNetUnfolderBase]: For 1371/1376 co-relation queries the response was YES. [2024-06-28 01:13:04,876 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. [2024-06-28 01:13:04,879 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 57 selfloop transitions, 29 changer transitions 0/93 dead transitions. [2024-06-28 01:13:04,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 699 flow [2024-06-28 01:13:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:13:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:13:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 01:13:04,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163398692810458 [2024-06-28 01:13:04,880 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 363 flow. Second operand 9 states and 158 transitions. [2024-06-28 01:13:04,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 699 flow [2024-06-28 01:13:04,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 647 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 01:13:04,886 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 434 flow [2024-06-28 01:13:04,886 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} [2024-06-28 01:13:04,888 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 30 predicate places. [2024-06-28 01:13:04,888 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 434 flow [2024-06-28 01:13:04,888 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) [2024-06-28 01:13:04,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:04,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:04,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 01:13:04,889 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)] === [2024-06-28 01:13:04,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash 148751756, now seen corresponding path program 2 times [2024-06-28 01:13:04,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:04,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812254286] [2024-06-28 01:13:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:05,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:05,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812254286] [2024-06-28 01:13:05,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812254286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:05,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:05,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:13:05,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62526803] [2024-06-28 01:13:05,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:05,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:13:05,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:05,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:13:05,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:13:05,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:05,145 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) [2024-06-28 01:13:05,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:05,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:05,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:05,270 INFO L124 PetriNetUnfolderBase]: 385/670 cut-off events. [2024-06-28 01:13:05,271 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-06-28 01:13:05,272 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. [2024-06-28 01:13:05,274 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 57 selfloop transitions, 32 changer transitions 0/96 dead transitions. [2024-06-28 01:13:05,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 807 flow [2024-06-28 01:13:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:13:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:13:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 01:13:05,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-06-28 01:13:05,276 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 434 flow. Second operand 9 states and 152 transitions. [2024-06-28 01:13:05,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 807 flow [2024-06-28 01:13:05,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 736 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 01:13:05,281 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 549 flow [2024-06-28 01:13:05,281 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} [2024-06-28 01:13:05,281 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 35 predicate places. [2024-06-28 01:13:05,282 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 549 flow [2024-06-28 01:13:05,282 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) [2024-06-28 01:13:05,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:05,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:05,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 01:13:05,282 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)] === [2024-06-28 01:13:05,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:05,283 INFO L85 PathProgramCache]: Analyzing trace with hash -622892136, now seen corresponding path program 3 times [2024-06-28 01:13:05,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:05,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041237371] [2024-06-28 01:13:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:05,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:05,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041237371] [2024-06-28 01:13:05,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041237371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:05,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:05,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:13:05,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799018779] [2024-06-28 01:13:05,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:05,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:13:05,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:05,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:13:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:13:05,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:05,523 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) [2024-06-28 01:13:05,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:05,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:05,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:05,663 INFO L124 PetriNetUnfolderBase]: 397/688 cut-off events. [2024-06-28 01:13:05,663 INFO L125 PetriNetUnfolderBase]: For 1934/1944 co-relation queries the response was YES. [2024-06-28 01:13:05,664 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. [2024-06-28 01:13:05,667 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 63 selfloop transitions, 36 changer transitions 0/106 dead transitions. [2024-06-28 01:13:05,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 922 flow [2024-06-28 01:13:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:13:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:13:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 01:13:05,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032679738562091 [2024-06-28 01:13:05,669 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 549 flow. Second operand 9 states and 154 transitions. [2024-06-28 01:13:05,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 922 flow [2024-06-28 01:13:05,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 882 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 01:13:05,676 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 670 flow [2024-06-28 01:13:05,676 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} [2024-06-28 01:13:05,676 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2024-06-28 01:13:05,676 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 670 flow [2024-06-28 01:13:05,677 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) [2024-06-28 01:13:05,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:05,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:05,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 01:13:05,677 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)] === [2024-06-28 01:13:05,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 149346402, now seen corresponding path program 4 times [2024-06-28 01:13:05,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:05,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242273960] [2024-06-28 01:13:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:05,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:05,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242273960] [2024-06-28 01:13:05,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242273960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:05,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:05,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:13:05,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259779029] [2024-06-28 01:13:05,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:05,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:13:05,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:13:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:13:05,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:05,916 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) [2024-06-28 01:13:05,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:05,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:05,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:06,095 INFO L124 PetriNetUnfolderBase]: 409/709 cut-off events. [2024-06-28 01:13:06,095 INFO L125 PetriNetUnfolderBase]: For 2414/2414 co-relation queries the response was YES. [2024-06-28 01:13:06,097 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. [2024-06-28 01:13:06,100 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 67 selfloop transitions, 38 changer transitions 0/112 dead transitions. [2024-06-28 01:13:06,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 1062 flow [2024-06-28 01:13:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:13:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:13:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 01:13:06,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065359477124183 [2024-06-28 01:13:06,101 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 670 flow. Second operand 9 states and 155 transitions. [2024-06-28 01:13:06,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 1062 flow [2024-06-28 01:13:06,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 112 transitions, 1003 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 01:13:06,108 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 771 flow [2024-06-28 01:13:06,109 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} [2024-06-28 01:13:06,109 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2024-06-28 01:13:06,109 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 771 flow [2024-06-28 01:13:06,110 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) [2024-06-28 01:13:06,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:06,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:06,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 01:13:06,110 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)] === [2024-06-28 01:13:06,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash 314779076, now seen corresponding path program 5 times [2024-06-28 01:13:06,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:06,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287115678] [2024-06-28 01:13:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:06,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:06,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:06,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287115678] [2024-06-28 01:13:06,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287115678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:06,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:06,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:13:06,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866220809] [2024-06-28 01:13:06,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:06,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:13:06,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:06,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:13:06,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:13:06,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:06,309 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) [2024-06-28 01:13:06,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:06,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:06,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:06,443 INFO L124 PetriNetUnfolderBase]: 415/714 cut-off events. [2024-06-28 01:13:06,443 INFO L125 PetriNetUnfolderBase]: For 2955/2955 co-relation queries the response was YES. [2024-06-28 01:13:06,445 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. [2024-06-28 01:13:06,448 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 66 selfloop transitions, 41 changer transitions 0/114 dead transitions. [2024-06-28 01:13:06,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1159 flow [2024-06-28 01:13:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:13:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:13:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 01:13:06,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934640522875817 [2024-06-28 01:13:06,450 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 771 flow. Second operand 9 states and 151 transitions. [2024-06-28 01:13:06,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1159 flow [2024-06-28 01:13:06,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 114 transitions, 1103 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 01:13:06,465 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 873 flow [2024-06-28 01:13:06,465 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} [2024-06-28 01:13:06,466 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 55 predicate places. [2024-06-28 01:13:06,466 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 873 flow [2024-06-28 01:13:06,466 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) [2024-06-28 01:13:06,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:06,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:06,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 01:13:06,467 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)] === [2024-06-28 01:13:06,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash 322135376, now seen corresponding path program 6 times [2024-06-28 01:13:06,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:06,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33125552] [2024-06-28 01:13:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:06,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:06,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:06,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33125552] [2024-06-28 01:13:06,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33125552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:06,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:06,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:13:06,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550138098] [2024-06-28 01:13:06,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:06,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:13:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:13:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:13:06,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:06,701 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) [2024-06-28 01:13:06,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:06,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:06,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:06,826 INFO L124 PetriNetUnfolderBase]: 415/714 cut-off events. [2024-06-28 01:13:06,827 INFO L125 PetriNetUnfolderBase]: For 3553/3559 co-relation queries the response was YES. [2024-06-28 01:13:06,828 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. [2024-06-28 01:13:06,832 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 68 selfloop transitions, 45 changer transitions 0/120 dead transitions. [2024-06-28 01:13:06,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1285 flow [2024-06-28 01:13:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:13:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:13:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 01:13:06,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:06,833 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 873 flow. Second operand 9 states and 153 transitions. [2024-06-28 01:13:06,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1285 flow [2024-06-28 01:13:06,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 1207 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 01:13:06,841 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 985 flow [2024-06-28 01:13:06,841 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} [2024-06-28 01:13:06,842 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 61 predicate places. [2024-06-28 01:13:06,842 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 985 flow [2024-06-28 01:13:06,842 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) [2024-06-28 01:13:06,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:06,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:06,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 01:13:06,843 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)] === [2024-06-28 01:13:06,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash 485330931, now seen corresponding path program 1 times [2024-06-28 01:13:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:06,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976347305] [2024-06-28 01:13:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:06,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:06,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:06,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976347305] [2024-06-28 01:13:06,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976347305] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:13:06,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34432152] [2024-06-28 01:13:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:06,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:13:06,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:13:06,913 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) [2024-06-28 01:13:06,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-28 01:13:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:06,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-28 01:13:06,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:13:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:07,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:13:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:07,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34432152] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:13:07,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:13:07,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-06-28 01:13:07,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143343431] [2024-06-28 01:13:07,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:13:07,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:13:07,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:13:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:13:07,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-28 01:13:07,032 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) [2024-06-28 01:13:07,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:07,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-28 01:13:07,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:07,143 INFO L124 PetriNetUnfolderBase]: 396/727 cut-off events. [2024-06-28 01:13:07,144 INFO L125 PetriNetUnfolderBase]: For 4964/5041 co-relation queries the response was YES. [2024-06-28 01:13:07,146 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. [2024-06-28 01:13:07,150 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 67 selfloop transitions, 27 changer transitions 0/120 dead transitions. [2024-06-28 01:13:07,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1383 flow [2024-06-28 01:13:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:13:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:13:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-28 01:13:07,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-06-28 01:13:07,152 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 985 flow. Second operand 6 states and 138 transitions. [2024-06-28 01:13:07,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1383 flow [2024-06-28 01:13:07,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 1293 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 01:13:07,161 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 1003 flow [2024-06-28 01:13:07,161 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} [2024-06-28 01:13:07,161 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 64 predicate places. [2024-06-28 01:13:07,161 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 1003 flow [2024-06-28 01:13:07,162 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) [2024-06-28 01:13:07,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:07,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:07,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-28 01:13:07,373 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 [2024-06-28 01:13:07,374 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)] === [2024-06-28 01:13:07,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:07,375 INFO L85 PathProgramCache]: Analyzing trace with hash 392354368, now seen corresponding path program 1 times [2024-06-28 01:13:07,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:07,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987968356] [2024-06-28 01:13:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:07,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:07,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:07,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987968356] [2024-06-28 01:13:07,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987968356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:07,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:07,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:07,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136023877] [2024-06-28 01:13:07,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:07,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:07,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:07,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:07,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:07,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:07,672 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) [2024-06-28 01:13:07,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:07,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:07,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:07,891 INFO L124 PetriNetUnfolderBase]: 547/951 cut-off events. [2024-06-28 01:13:07,891 INFO L125 PetriNetUnfolderBase]: For 6044/6049 co-relation queries the response was YES. [2024-06-28 01:13:07,894 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. [2024-06-28 01:13:07,898 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 86 selfloop transitions, 51 changer transitions 0/144 dead transitions. [2024-06-28 01:13:07,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 144 transitions, 1582 flow [2024-06-28 01:13:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-28 01:13:07,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235294117647059 [2024-06-28 01:13:07,900 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 1003 flow. Second operand 10 states and 178 transitions. [2024-06-28 01:13:07,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 144 transitions, 1582 flow [2024-06-28 01:13:07,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 144 transitions, 1516 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-28 01:13:07,916 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 1120 flow [2024-06-28 01:13:07,916 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} [2024-06-28 01:13:07,917 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 73 predicate places. [2024-06-28 01:13:07,917 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 1120 flow [2024-06-28 01:13:07,917 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) [2024-06-28 01:13:07,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:07,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:07,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 01:13:07,918 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)] === [2024-06-28 01:13:07,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash 991216414, now seen corresponding path program 2 times [2024-06-28 01:13:07,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:07,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101723988] [2024-06-28 01:13:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:07,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:08,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:08,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101723988] [2024-06-28 01:13:08,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101723988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:08,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:08,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:08,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047622353] [2024-06-28 01:13:08,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:08,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:08,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:08,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:08,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:08,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:08,208 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) [2024-06-28 01:13:08,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:08,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:08,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:08,442 INFO L124 PetriNetUnfolderBase]: 583/1011 cut-off events. [2024-06-28 01:13:08,443 INFO L125 PetriNetUnfolderBase]: For 7361/7361 co-relation queries the response was YES. [2024-06-28 01:13:08,445 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. [2024-06-28 01:13:08,450 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 86 selfloop transitions, 52 changer transitions 0/145 dead transitions. [2024-06-28 01:13:08,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 145 transitions, 1667 flow [2024-06-28 01:13:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-28 01:13:08,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176470588235295 [2024-06-28 01:13:08,453 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 1120 flow. Second operand 10 states and 176 transitions. [2024-06-28 01:13:08,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 145 transitions, 1667 flow [2024-06-28 01:13:08,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 145 transitions, 1581 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 01:13:08,467 INFO L231 Difference]: Finished difference. Result has 113 places, 105 transitions, 1215 flow [2024-06-28 01:13:08,467 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} [2024-06-28 01:13:08,468 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 78 predicate places. [2024-06-28 01:13:08,468 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 105 transitions, 1215 flow [2024-06-28 01:13:08,468 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) [2024-06-28 01:13:08,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:08,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:08,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 01:13:08,469 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)] === [2024-06-28 01:13:08,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash 991220134, now seen corresponding path program 3 times [2024-06-28 01:13:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:08,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104023141] [2024-06-28 01:13:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:08,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:08,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:08,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104023141] [2024-06-28 01:13:08,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104023141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:08,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:08,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:08,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444167439] [2024-06-28 01:13:08,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:08,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:08,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:08,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:08,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:08,721 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) [2024-06-28 01:13:08,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:08,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:08,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:08,897 INFO L124 PetriNetUnfolderBase]: 601/1038 cut-off events. [2024-06-28 01:13:08,897 INFO L125 PetriNetUnfolderBase]: For 8196/8201 co-relation queries the response was YES. [2024-06-28 01:13:08,899 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. [2024-06-28 01:13:08,906 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 83 selfloop transitions, 54 changer transitions 0/144 dead transitions. [2024-06-28 01:13:08,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 144 transitions, 1699 flow [2024-06-28 01:13:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 01:13:08,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117647058823529 [2024-06-28 01:13:08,908 INFO L175 Difference]: Start difference. First operand has 113 places, 105 transitions, 1215 flow. Second operand 10 states and 174 transitions. [2024-06-28 01:13:08,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 144 transitions, 1699 flow [2024-06-28 01:13:08,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 144 transitions, 1622 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 01:13:08,924 INFO L231 Difference]: Finished difference. Result has 117 places, 107 transitions, 1291 flow [2024-06-28 01:13:08,925 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} [2024-06-28 01:13:08,926 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 82 predicate places. [2024-06-28 01:13:08,926 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 107 transitions, 1291 flow [2024-06-28 01:13:08,926 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) [2024-06-28 01:13:08,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:08,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:08,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 01:13:08,927 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)] === [2024-06-28 01:13:08,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:08,927 INFO L85 PathProgramCache]: Analyzing trace with hash 991220289, now seen corresponding path program 1 times [2024-06-28 01:13:08,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:08,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274414499] [2024-06-28 01:13:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:08,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:09,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:09,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274414499] [2024-06-28 01:13:09,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274414499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:09,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:09,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:09,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769517442] [2024-06-28 01:13:09,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:09,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:09,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:09,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:09,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:09,220 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) [2024-06-28 01:13:09,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:09,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:09,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:09,432 INFO L124 PetriNetUnfolderBase]: 619/1071 cut-off events. [2024-06-28 01:13:09,433 INFO L125 PetriNetUnfolderBase]: For 9365/9370 co-relation queries the response was YES. [2024-06-28 01:13:09,435 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. [2024-06-28 01:13:09,444 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 84 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-06-28 01:13:09,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 146 transitions, 1758 flow [2024-06-28 01:13:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 01:13:09,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117647058823529 [2024-06-28 01:13:09,446 INFO L175 Difference]: Start difference. First operand has 117 places, 107 transitions, 1291 flow. Second operand 10 states and 174 transitions. [2024-06-28 01:13:09,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 146 transitions, 1758 flow [2024-06-28 01:13:09,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 146 transitions, 1646 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 01:13:09,463 INFO L231 Difference]: Finished difference. Result has 119 places, 109 transitions, 1329 flow [2024-06-28 01:13:09,463 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} [2024-06-28 01:13:09,463 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 84 predicate places. [2024-06-28 01:13:09,464 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 1329 flow [2024-06-28 01:13:09,464 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) [2024-06-28 01:13:09,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:09,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:09,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 01:13:09,464 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)] === [2024-06-28 01:13:09,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash 328371713, now seen corresponding path program 2 times [2024-06-28 01:13:09,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:09,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236311242] [2024-06-28 01:13:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:09,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:09,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236311242] [2024-06-28 01:13:09,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236311242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:09,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:09,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:09,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171312390] [2024-06-28 01:13:09,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:09,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:09,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:09,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:09,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:09,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:09,725 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) [2024-06-28 01:13:09,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:09,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:09,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:09,937 INFO L124 PetriNetUnfolderBase]: 637/1098 cut-off events. [2024-06-28 01:13:09,937 INFO L125 PetriNetUnfolderBase]: For 10073/10078 co-relation queries the response was YES. [2024-06-28 01:13:09,940 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. [2024-06-28 01:13:09,945 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 87 selfloop transitions, 51 changer transitions 0/145 dead transitions. [2024-06-28 01:13:09,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 145 transitions, 1790 flow [2024-06-28 01:13:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 01:13:09,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:09,946 INFO L175 Difference]: Start difference. First operand has 119 places, 109 transitions, 1329 flow. Second operand 10 states and 170 transitions. [2024-06-28 01:13:09,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 145 transitions, 1790 flow [2024-06-28 01:13:09,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 145 transitions, 1697 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 01:13:09,965 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1380 flow [2024-06-28 01:13:09,965 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} [2024-06-28 01:13:09,966 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 87 predicate places. [2024-06-28 01:13:09,966 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1380 flow [2024-06-28 01:13:09,966 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) [2024-06-28 01:13:09,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:09,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:09,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 01:13:09,967 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)] === [2024-06-28 01:13:09,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash 328367838, now seen corresponding path program 4 times [2024-06-28 01:13:09,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:09,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230898899] [2024-06-28 01:13:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:09,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:10,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:10,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230898899] [2024-06-28 01:13:10,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230898899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:10,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:10,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:10,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819807250] [2024-06-28 01:13:10,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:10,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:10,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:10,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:10,214 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) [2024-06-28 01:13:10,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:10,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:10,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:10,415 INFO L124 PetriNetUnfolderBase]: 673/1158 cut-off events. [2024-06-28 01:13:10,416 INFO L125 PetriNetUnfolderBase]: For 12189/12194 co-relation queries the response was YES. [2024-06-28 01:13:10,419 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. [2024-06-28 01:13:10,423 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 52 changer transitions 0/152 dead transitions. [2024-06-28 01:13:10,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 152 transitions, 1955 flow [2024-06-28 01:13:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-28 01:13:10,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058823529411764 [2024-06-28 01:13:10,424 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1380 flow. Second operand 10 states and 172 transitions. [2024-06-28 01:13:10,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 152 transitions, 1955 flow [2024-06-28 01:13:10,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 152 transitions, 1837 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 01:13:10,446 INFO L231 Difference]: Finished difference. Result has 125 places, 115 transitions, 1453 flow [2024-06-28 01:13:10,447 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} [2024-06-28 01:13:10,447 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 90 predicate places. [2024-06-28 01:13:10,447 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 115 transitions, 1453 flow [2024-06-28 01:13:10,447 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) [2024-06-28 01:13:10,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:10,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:10,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 01:13:10,448 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)] === [2024-06-28 01:13:10,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:10,448 INFO L85 PathProgramCache]: Analyzing trace with hash 187162218, now seen corresponding path program 5 times [2024-06-28 01:13:10,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:10,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766432594] [2024-06-28 01:13:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:10,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:10,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:10,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766432594] [2024-06-28 01:13:10,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766432594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:10,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:10,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:10,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130760652] [2024-06-28 01:13:10,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:10,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:10,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:10,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:10,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:10,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:10,718 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) [2024-06-28 01:13:10,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:10,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:10,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:10,980 INFO L124 PetriNetUnfolderBase]: 691/1188 cut-off events. [2024-06-28 01:13:10,980 INFO L125 PetriNetUnfolderBase]: For 13282/13282 co-relation queries the response was YES. [2024-06-28 01:13:10,984 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. [2024-06-28 01:13:10,989 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 90 selfloop transitions, 54 changer transitions 0/151 dead transitions. [2024-06-28 01:13:10,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 151 transitions, 1957 flow [2024-06-28 01:13:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:10,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 01:13:10,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:10,990 INFO L175 Difference]: Start difference. First operand has 125 places, 115 transitions, 1453 flow. Second operand 10 states and 170 transitions. [2024-06-28 01:13:10,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 151 transitions, 1957 flow [2024-06-28 01:13:11,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 151 transitions, 1879 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 01:13:11,014 INFO L231 Difference]: Finished difference. Result has 129 places, 117 transitions, 1534 flow [2024-06-28 01:13:11,014 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} [2024-06-28 01:13:11,014 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 94 predicate places. [2024-06-28 01:13:11,014 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 117 transitions, 1534 flow [2024-06-28 01:13:11,015 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) [2024-06-28 01:13:11,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:11,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:11,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 01:13:11,015 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)] === [2024-06-28 01:13:11,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:11,016 INFO L85 PathProgramCache]: Analyzing trace with hash 334771818, now seen corresponding path program 6 times [2024-06-28 01:13:11,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:11,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353677107] [2024-06-28 01:13:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:11,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:11,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353677107] [2024-06-28 01:13:11,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353677107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:11,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:11,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493827951] [2024-06-28 01:13:11,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:11,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:11,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:11,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:11,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:11,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:11,251 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) [2024-06-28 01:13:11,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:11,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:11,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:11,473 INFO L124 PetriNetUnfolderBase]: 709/1215 cut-off events. [2024-06-28 01:13:11,473 INFO L125 PetriNetUnfolderBase]: For 14795/14795 co-relation queries the response was YES. [2024-06-28 01:13:11,476 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. [2024-06-28 01:13:11,480 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 92 selfloop transitions, 54 changer transitions 0/153 dead transitions. [2024-06-28 01:13:11,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 153 transitions, 2045 flow [2024-06-28 01:13:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 01:13:11,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:11,481 INFO L175 Difference]: Start difference. First operand has 129 places, 117 transitions, 1534 flow. Second operand 10 states and 170 transitions. [2024-06-28 01:13:11,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 153 transitions, 2045 flow [2024-06-28 01:13:11,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1962 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 01:13:11,505 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 1613 flow [2024-06-28 01:13:11,505 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} [2024-06-28 01:13:11,505 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 97 predicate places. [2024-06-28 01:13:11,506 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 1613 flow [2024-06-28 01:13:11,506 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) [2024-06-28 01:13:11,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:11,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:11,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 01:13:11,506 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)] === [2024-06-28 01:13:11,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:11,507 INFO L85 PathProgramCache]: Analyzing trace with hash 335008193, now seen corresponding path program 3 times [2024-06-28 01:13:11,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:11,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295562167] [2024-06-28 01:13:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:11,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:11,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:11,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295562167] [2024-06-28 01:13:11,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295562167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:11,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:11,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501628320] [2024-06-28 01:13:11,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:11,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:11,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:11,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:11,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:11,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:11,743 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) [2024-06-28 01:13:11,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:11,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:11,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:11,992 INFO L124 PetriNetUnfolderBase]: 745/1275 cut-off events. [2024-06-28 01:13:11,992 INFO L125 PetriNetUnfolderBase]: For 16389/16394 co-relation queries the response was YES. [2024-06-28 01:13:11,996 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. [2024-06-28 01:13:12,000 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 98 selfloop transitions, 55 changer transitions 0/160 dead transitions. [2024-06-28 01:13:12,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 160 transitions, 2165 flow [2024-06-28 01:13:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-28 01:13:12,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088235294117647 [2024-06-28 01:13:12,002 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 1613 flow. Second operand 10 states and 173 transitions. [2024-06-28 01:13:12,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 160 transitions, 2165 flow [2024-06-28 01:13:12,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 160 transitions, 2043 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 01:13:12,030 INFO L231 Difference]: Finished difference. Result has 135 places, 123 transitions, 1689 flow [2024-06-28 01:13:12,030 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} [2024-06-28 01:13:12,030 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 100 predicate places. [2024-06-28 01:13:12,030 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 1689 flow [2024-06-28 01:13:12,031 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) [2024-06-28 01:13:12,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:12,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:12,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 01:13:12,031 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)] === [2024-06-28 01:13:12,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:12,031 INFO L85 PathProgramCache]: Analyzing trace with hash 334771973, now seen corresponding path program 4 times [2024-06-28 01:13:12,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:12,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26516203] [2024-06-28 01:13:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:12,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:12,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:12,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26516203] [2024-06-28 01:13:12,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26516203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:12,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:12,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787292895] [2024-06-28 01:13:12,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:12,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:12,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:12,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:12,279 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) [2024-06-28 01:13:12,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:12,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:12,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:12,539 INFO L124 PetriNetUnfolderBase]: 763/1305 cut-off events. [2024-06-28 01:13:12,539 INFO L125 PetriNetUnfolderBase]: For 18011/18016 co-relation queries the response was YES. [2024-06-28 01:13:12,544 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. [2024-06-28 01:13:12,549 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 58 changer transitions 0/159 dead transitions. [2024-06-28 01:13:12,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 159 transitions, 2193 flow [2024-06-28 01:13:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 01:13:12,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:12,550 INFO L175 Difference]: Start difference. First operand has 135 places, 123 transitions, 1689 flow. Second operand 10 states and 170 transitions. [2024-06-28 01:13:12,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 159 transitions, 2193 flow [2024-06-28 01:13:12,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 159 transitions, 2103 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 01:13:12,579 INFO L231 Difference]: Finished difference. Result has 139 places, 125 transitions, 1764 flow [2024-06-28 01:13:12,580 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} [2024-06-28 01:13:12,580 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 104 predicate places. [2024-06-28 01:13:12,580 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 125 transitions, 1764 flow [2024-06-28 01:13:12,580 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) [2024-06-28 01:13:12,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:12,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:12,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 01:13:12,580 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)] === [2024-06-28 01:13:12,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash 316337792, now seen corresponding path program 7 times [2024-06-28 01:13:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:12,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36848195] [2024-06-28 01:13:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:12,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:12,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36848195] [2024-06-28 01:13:12,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36848195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:12,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:12,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:12,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147900922] [2024-06-28 01:13:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:12,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:12,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:12,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:12,880 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) [2024-06-28 01:13:12,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:12,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:12,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:13,097 INFO L124 PetriNetUnfolderBase]: 781/1331 cut-off events. [2024-06-28 01:13:13,097 INFO L125 PetriNetUnfolderBase]: For 20951/20957 co-relation queries the response was YES. [2024-06-28 01:13:13,101 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. [2024-06-28 01:13:13,106 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 92 selfloop transitions, 59 changer transitions 0/158 dead transitions. [2024-06-28 01:13:13,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 158 transitions, 2295 flow [2024-06-28 01:13:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 01:13:13,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-28 01:13:13,108 INFO L175 Difference]: Start difference. First operand has 139 places, 125 transitions, 1764 flow. Second operand 10 states and 167 transitions. [2024-06-28 01:13:13,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 158 transitions, 2295 flow [2024-06-28 01:13:13,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 2198 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 01:13:13,139 INFO L231 Difference]: Finished difference. Result has 142 places, 127 transitions, 1843 flow [2024-06-28 01:13:13,139 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} [2024-06-28 01:13:13,139 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 107 predicate places. [2024-06-28 01:13:13,139 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 127 transitions, 1843 flow [2024-06-28 01:13:13,140 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) [2024-06-28 01:13:13,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:13,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:13,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 01:13:13,140 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)] === [2024-06-28 01:13:13,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash 316337947, now seen corresponding path program 5 times [2024-06-28 01:13:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:13,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079535793] [2024-06-28 01:13:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:13,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:13,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079535793] [2024-06-28 01:13:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079535793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:13,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:13,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:13,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096645233] [2024-06-28 01:13:13,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:13,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:13,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:13,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:13,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:13,378 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) [2024-06-28 01:13:13,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:13,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:13,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:13,594 INFO L124 PetriNetUnfolderBase]: 799/1358 cut-off events. [2024-06-28 01:13:13,595 INFO L125 PetriNetUnfolderBase]: For 22219/22225 co-relation queries the response was YES. [2024-06-28 01:13:13,599 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. [2024-06-28 01:13:13,603 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 60 changer transitions 0/160 dead transitions. [2024-06-28 01:13:13,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 160 transitions, 2347 flow [2024-06-28 01:13:13,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 01:13:13,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-28 01:13:13,605 INFO L175 Difference]: Start difference. First operand has 142 places, 127 transitions, 1843 flow. Second operand 10 states and 167 transitions. [2024-06-28 01:13:13,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 160 transitions, 2347 flow [2024-06-28 01:13:13,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 160 transitions, 2217 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 01:13:13,639 INFO L231 Difference]: Finished difference. Result has 144 places, 129 transitions, 1886 flow [2024-06-28 01:13:13,639 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} [2024-06-28 01:13:13,640 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 109 predicate places. [2024-06-28 01:13:13,640 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 129 transitions, 1886 flow [2024-06-28 01:13:13,640 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) [2024-06-28 01:13:13,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:13,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:13,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 01:13:13,640 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)] === [2024-06-28 01:13:13,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash 316574167, now seen corresponding path program 6 times [2024-06-28 01:13:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:13,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698509371] [2024-06-28 01:13:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:13,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:13,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:13,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698509371] [2024-06-28 01:13:13,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698509371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:13,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:13,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:13,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348721608] [2024-06-28 01:13:13,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:13,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:13,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:13,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:13,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:13,897 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) [2024-06-28 01:13:13,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:13,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:13,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:14,169 INFO L124 PetriNetUnfolderBase]: 835/1421 cut-off events. [2024-06-28 01:13:14,170 INFO L125 PetriNetUnfolderBase]: For 24198/24198 co-relation queries the response was YES. [2024-06-28 01:13:14,173 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. [2024-06-28 01:13:14,178 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 99 selfloop transitions, 61 changer transitions 0/167 dead transitions. [2024-06-28 01:13:14,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 167 transitions, 2464 flow [2024-06-28 01:13:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 01:13:14,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:14,179 INFO L175 Difference]: Start difference. First operand has 144 places, 129 transitions, 1886 flow. Second operand 10 states and 170 transitions. [2024-06-28 01:13:14,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 167 transitions, 2464 flow [2024-06-28 01:13:14,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 167 transitions, 2360 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 01:13:14,216 INFO L231 Difference]: Finished difference. Result has 148 places, 133 transitions, 2002 flow [2024-06-28 01:13:14,217 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} [2024-06-28 01:13:14,217 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 113 predicate places. [2024-06-28 01:13:14,217 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 133 transitions, 2002 flow [2024-06-28 01:13:14,217 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) [2024-06-28 01:13:14,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:14,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:14,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 01:13:14,218 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)] === [2024-06-28 01:13:14,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash 168728192, now seen corresponding path program 8 times [2024-06-28 01:13:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:14,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059149114] [2024-06-28 01:13:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:14,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:14,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059149114] [2024-06-28 01:13:14,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059149114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:14,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:14,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:14,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728943392] [2024-06-28 01:13:14,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:14,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:14,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:14,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:14,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:14,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:14,429 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) [2024-06-28 01:13:14,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:14,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:14,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:14,683 INFO L124 PetriNetUnfolderBase]: 853/1448 cut-off events. [2024-06-28 01:13:14,683 INFO L125 PetriNetUnfolderBase]: For 27567/27567 co-relation queries the response was YES. [2024-06-28 01:13:14,687 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. [2024-06-28 01:13:14,692 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 65 changer transitions 0/166 dead transitions. [2024-06-28 01:13:14,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 166 transitions, 2567 flow [2024-06-28 01:13:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:14,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 01:13:14,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-28 01:13:14,693 INFO L175 Difference]: Start difference. First operand has 148 places, 133 transitions, 2002 flow. Second operand 10 states and 167 transitions. [2024-06-28 01:13:14,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 166 transitions, 2567 flow [2024-06-28 01:13:14,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 166 transitions, 2464 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 01:13:14,735 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 2091 flow [2024-06-28 01:13:14,735 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} [2024-06-28 01:13:14,735 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 117 predicate places. [2024-06-28 01:13:14,736 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 2091 flow [2024-06-28 01:13:14,736 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) [2024-06-28 01:13:14,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:14,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:14,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 01:13:14,736 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)] === [2024-06-28 01:13:14,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:14,737 INFO L85 PathProgramCache]: Analyzing trace with hash 168728347, now seen corresponding path program 7 times [2024-06-28 01:13:14,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:14,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775897880] [2024-06-28 01:13:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:14,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:14,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:14,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775897880] [2024-06-28 01:13:14,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775897880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:14,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:14,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:14,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142423248] [2024-06-28 01:13:14,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:14,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:14,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:14,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:14,993 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) [2024-06-28 01:13:14,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:14,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:14,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:15,242 INFO L124 PetriNetUnfolderBase]: 871/1475 cut-off events. [2024-06-28 01:13:15,242 INFO L125 PetriNetUnfolderBase]: For 29257/29263 co-relation queries the response was YES. [2024-06-28 01:13:15,247 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. [2024-06-28 01:13:15,252 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 66 changer transitions 0/168 dead transitions. [2024-06-28 01:13:15,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 168 transitions, 2625 flow [2024-06-28 01:13:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 01:13:15,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-28 01:13:15,253 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 2091 flow. Second operand 10 states and 167 transitions. [2024-06-28 01:13:15,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 168 transitions, 2625 flow [2024-06-28 01:13:15,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 168 transitions, 2481 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 01:13:15,298 INFO L231 Difference]: Finished difference. Result has 154 places, 137 transitions, 2138 flow [2024-06-28 01:13:15,298 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} [2024-06-28 01:13:15,299 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 119 predicate places. [2024-06-28 01:13:15,299 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 137 transitions, 2138 flow [2024-06-28 01:13:15,299 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) [2024-06-28 01:13:15,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:15,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:15,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 01:13:15,299 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)] === [2024-06-28 01:13:15,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash 168666812, now seen corresponding path program 9 times [2024-06-28 01:13:15,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:15,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657498138] [2024-06-28 01:13:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:15,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:15,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:15,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657498138] [2024-06-28 01:13:15,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657498138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:15,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:15,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:15,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245689714] [2024-06-28 01:13:15,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:15,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:15,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:15,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:15,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:15,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:15,565 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) [2024-06-28 01:13:15,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:15,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:15,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:15,814 INFO L124 PetriNetUnfolderBase]: 889/1505 cut-off events. [2024-06-28 01:13:15,814 INFO L125 PetriNetUnfolderBase]: For 31950/31956 co-relation queries the response was YES. [2024-06-28 01:13:15,821 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. [2024-06-28 01:13:15,826 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 100 selfloop transitions, 67 changer transitions 0/174 dead transitions. [2024-06-28 01:13:15,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 174 transitions, 2804 flow [2024-06-28 01:13:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 01:13:15,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970588235294118 [2024-06-28 01:13:15,827 INFO L175 Difference]: Start difference. First operand has 154 places, 137 transitions, 2138 flow. Second operand 10 states and 169 transitions. [2024-06-28 01:13:15,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 174 transitions, 2804 flow [2024-06-28 01:13:15,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 174 transitions, 2694 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 01:13:15,871 INFO L231 Difference]: Finished difference. Result has 158 places, 140 transitions, 2253 flow [2024-06-28 01:13:15,871 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} [2024-06-28 01:13:15,871 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 123 predicate places. [2024-06-28 01:13:15,872 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 140 transitions, 2253 flow [2024-06-28 01:13:15,872 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) [2024-06-28 01:13:15,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:15,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:15,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 01:13:15,872 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)] === [2024-06-28 01:13:15,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1404542661, now seen corresponding path program 8 times [2024-06-28 01:13:15,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:15,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872449132] [2024-06-28 01:13:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:15,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:16,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:16,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872449132] [2024-06-28 01:13:16,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872449132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:16,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:16,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:16,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623202624] [2024-06-28 01:13:16,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:16,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:16,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:16,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:16,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:16,111 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) [2024-06-28 01:13:16,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:16,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:16,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:16,389 INFO L124 PetriNetUnfolderBase]: 925/1565 cut-off events. [2024-06-28 01:13:16,390 INFO L125 PetriNetUnfolderBase]: For 34162/34168 co-relation queries the response was YES. [2024-06-28 01:13:16,395 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. [2024-06-28 01:13:16,399 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 98 selfloop transitions, 71 changer transitions 0/176 dead transitions. [2024-06-28 01:13:16,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 176 transitions, 2863 flow [2024-06-28 01:13:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 01:13:16,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2024-06-28 01:13:16,400 INFO L175 Difference]: Start difference. First operand has 158 places, 140 transitions, 2253 flow. Second operand 10 states and 166 transitions. [2024-06-28 01:13:16,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 176 transitions, 2863 flow [2024-06-28 01:13:16,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 176 transitions, 2743 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:16,448 INFO L231 Difference]: Finished difference. Result has 161 places, 145 transitions, 2402 flow [2024-06-28 01:13:16,448 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} [2024-06-28 01:13:16,449 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2024-06-28 01:13:16,449 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 145 transitions, 2402 flow [2024-06-28 01:13:16,449 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) [2024-06-28 01:13:16,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:16,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:16,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 01:13:16,449 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)] === [2024-06-28 01:13:16,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:16,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1396268451, now seen corresponding path program 9 times [2024-06-28 01:13:16,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:16,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811969362] [2024-06-28 01:13:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:16,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:16,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:16,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811969362] [2024-06-28 01:13:16,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811969362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:16,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:16,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:16,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796411379] [2024-06-28 01:13:16,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:16,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:16,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:16,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:16,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:16,686 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) [2024-06-28 01:13:16,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:16,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:16,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:16,943 INFO L124 PetriNetUnfolderBase]: 925/1565 cut-off events. [2024-06-28 01:13:16,943 INFO L125 PetriNetUnfolderBase]: For 38341/38347 co-relation queries the response was YES. [2024-06-28 01:13:16,949 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. [2024-06-28 01:13:16,954 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 100 selfloop transitions, 73 changer transitions 0/180 dead transitions. [2024-06-28 01:13:16,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 180 transitions, 2984 flow [2024-06-28 01:13:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 01:13:16,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:16,956 INFO L175 Difference]: Start difference. First operand has 161 places, 145 transitions, 2402 flow. Second operand 10 states and 170 transitions. [2024-06-28 01:13:16,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 180 transitions, 2984 flow [2024-06-28 01:13:17,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 180 transitions, 2859 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 01:13:17,039 INFO L231 Difference]: Finished difference. Result has 166 places, 148 transitions, 2507 flow [2024-06-28 01:13:17,039 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} [2024-06-28 01:13:17,039 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 131 predicate places. [2024-06-28 01:13:17,039 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 148 transitions, 2507 flow [2024-06-28 01:13:17,039 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) [2024-06-28 01:13:17,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:17,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:17,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 01:13:17,040 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)] === [2024-06-28 01:13:17,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1396262716, now seen corresponding path program 10 times [2024-06-28 01:13:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142174086] [2024-06-28 01:13:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:17,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:17,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142174086] [2024-06-28 01:13:17,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142174086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:17,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:17,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:17,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602867848] [2024-06-28 01:13:17,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:17,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:17,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:17,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:17,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:17,280 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) [2024-06-28 01:13:17,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:17,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:17,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:17,530 INFO L124 PetriNetUnfolderBase]: 919/1556 cut-off events. [2024-06-28 01:13:17,530 INFO L125 PetriNetUnfolderBase]: For 39801/39807 co-relation queries the response was YES. [2024-06-28 01:13:17,536 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. [2024-06-28 01:13:17,541 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 75 changer transitions 0/177 dead transitions. [2024-06-28 01:13:17,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 177 transitions, 3039 flow [2024-06-28 01:13:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 01:13:17,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-28 01:13:17,542 INFO L175 Difference]: Start difference. First operand has 166 places, 148 transitions, 2507 flow. Second operand 10 states and 167 transitions. [2024-06-28 01:13:17,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 177 transitions, 3039 flow [2024-06-28 01:13:17,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 177 transitions, 2929 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 01:13:17,609 INFO L231 Difference]: Finished difference. Result has 171 places, 148 transitions, 2552 flow [2024-06-28 01:13:17,609 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} [2024-06-28 01:13:17,609 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 136 predicate places. [2024-06-28 01:13:17,609 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 148 transitions, 2552 flow [2024-06-28 01:13:17,610 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) [2024-06-28 01:13:17,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:17,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:17,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 01:13:17,610 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)] === [2024-06-28 01:13:17,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1396262871, now seen corresponding path program 10 times [2024-06-28 01:13:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484747650] [2024-06-28 01:13:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:17,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:17,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:17,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484747650] [2024-06-28 01:13:17,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484747650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:17,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:17,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:13:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199156378] [2024-06-28 01:13:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:17,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:13:17,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:17,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:13:17,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:13:17,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:17,868 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) [2024-06-28 01:13:17,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:17,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:17,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:18,162 INFO L124 PetriNetUnfolderBase]: 937/1586 cut-off events. [2024-06-28 01:13:18,162 INFO L125 PetriNetUnfolderBase]: For 42420/42426 co-relation queries the response was YES. [2024-06-28 01:13:18,168 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. [2024-06-28 01:13:18,174 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 96 selfloop transitions, 76 changer transitions 0/179 dead transitions. [2024-06-28 01:13:18,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 179 transitions, 3108 flow [2024-06-28 01:13:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:13:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:13:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 01:13:18,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-06-28 01:13:18,175 INFO L175 Difference]: Start difference. First operand has 171 places, 148 transitions, 2552 flow. Second operand 10 states and 167 transitions. [2024-06-28 01:13:18,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 179 transitions, 3108 flow [2024-06-28 01:13:18,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 179 transitions, 2896 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:18,239 INFO L231 Difference]: Finished difference. Result has 172 places, 150 transitions, 2561 flow [2024-06-28 01:13:18,239 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} [2024-06-28 01:13:18,239 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 137 predicate places. [2024-06-28 01:13:18,239 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 150 transitions, 2561 flow [2024-06-28 01:13:18,239 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) [2024-06-28 01:13:18,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:18,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:18,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 01:13:18,240 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)] === [2024-06-28 01:13:18,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1963042471, now seen corresponding path program 1 times [2024-06-28 01:13:18,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:18,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951640563] [2024-06-28 01:13:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:18,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:18,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:18,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951640563] [2024-06-28 01:13:18,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951640563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:18,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:18,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:18,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505257503] [2024-06-28 01:13:18,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:18,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:18,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:18,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:18,495 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) [2024-06-28 01:13:18,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:18,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:18,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:18,825 INFO L124 PetriNetUnfolderBase]: 991/1680 cut-off events. [2024-06-28 01:13:18,826 INFO L125 PetriNetUnfolderBase]: For 48161/48166 co-relation queries the response was YES. [2024-06-28 01:13:18,832 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. [2024-06-28 01:13:18,837 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 82 changer transitions 0/200 dead transitions. [2024-06-28 01:13:18,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 200 transitions, 3395 flow [2024-06-28 01:13:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-28 01:13:18,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213903743315508 [2024-06-28 01:13:18,838 INFO L175 Difference]: Start difference. First operand has 172 places, 150 transitions, 2561 flow. Second operand 11 states and 195 transitions. [2024-06-28 01:13:18,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 200 transitions, 3395 flow [2024-06-28 01:13:18,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 200 transitions, 3262 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 01:13:18,906 INFO L231 Difference]: Finished difference. Result has 176 places, 151 transitions, 2624 flow [2024-06-28 01:13:18,907 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} [2024-06-28 01:13:18,907 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 141 predicate places. [2024-06-28 01:13:18,907 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 151 transitions, 2624 flow [2024-06-28 01:13:18,907 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) [2024-06-28 01:13:18,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:18,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:18,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 01:13:18,907 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)] === [2024-06-28 01:13:18,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:18,908 INFO L85 PathProgramCache]: Analyzing trace with hash 662938569, now seen corresponding path program 2 times [2024-06-28 01:13:18,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:18,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494030774] [2024-06-28 01:13:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:18,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:19,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:19,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494030774] [2024-06-28 01:13:19,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494030774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:19,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:19,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:19,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960814519] [2024-06-28 01:13:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:19,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:19,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:19,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:19,211 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) [2024-06-28 01:13:19,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:19,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:19,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:19,571 INFO L124 PetriNetUnfolderBase]: 1045/1767 cut-off events. [2024-06-28 01:13:19,571 INFO L125 PetriNetUnfolderBase]: For 53897/53902 co-relation queries the response was YES. [2024-06-28 01:13:19,577 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. [2024-06-28 01:13:19,583 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 80 changer transitions 0/198 dead transitions. [2024-06-28 01:13:19,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 198 transitions, 3393 flow [2024-06-28 01:13:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-28 01:13:19,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516042780748663 [2024-06-28 01:13:19,584 INFO L175 Difference]: Start difference. First operand has 176 places, 151 transitions, 2624 flow. Second operand 11 states and 193 transitions. [2024-06-28 01:13:19,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 198 transitions, 3393 flow [2024-06-28 01:13:19,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 198 transitions, 3242 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 01:13:19,658 INFO L231 Difference]: Finished difference. Result has 180 places, 152 transitions, 2666 flow [2024-06-28 01:13:19,659 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} [2024-06-28 01:13:19,659 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 145 predicate places. [2024-06-28 01:13:19,659 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 152 transitions, 2666 flow [2024-06-28 01:13:19,659 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) [2024-06-28 01:13:19,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:19,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:19,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 01:13:19,660 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)] === [2024-06-28 01:13:19,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:19,660 INFO L85 PathProgramCache]: Analyzing trace with hash 663058539, now seen corresponding path program 3 times [2024-06-28 01:13:19,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:19,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967659434] [2024-06-28 01:13:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:19,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:19,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:19,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967659434] [2024-06-28 01:13:19,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967659434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:19,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:19,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:19,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756820935] [2024-06-28 01:13:19,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:19,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:19,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:19,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:19,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:19,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:19,934 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) [2024-06-28 01:13:19,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:19,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:19,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:20,269 INFO L124 PetriNetUnfolderBase]: 1099/1860 cut-off events. [2024-06-28 01:13:20,270 INFO L125 PetriNetUnfolderBase]: For 58599/58599 co-relation queries the response was YES. [2024-06-28 01:13:20,277 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. [2024-06-28 01:13:20,284 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 82 changer transitions 0/196 dead transitions. [2024-06-28 01:13:20,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 196 transitions, 3325 flow [2024-06-28 01:13:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-28 01:13:20,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106951871657754 [2024-06-28 01:13:20,285 INFO L175 Difference]: Start difference. First operand has 180 places, 152 transitions, 2666 flow. Second operand 11 states and 191 transitions. [2024-06-28 01:13:20,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 196 transitions, 3325 flow [2024-06-28 01:13:20,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 196 transitions, 3182 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:13:20,364 INFO L231 Difference]: Finished difference. Result has 185 places, 153 transitions, 2720 flow [2024-06-28 01:13:20,365 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} [2024-06-28 01:13:20,365 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 150 predicate places. [2024-06-28 01:13:20,365 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 153 transitions, 2720 flow [2024-06-28 01:13:20,365 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) [2024-06-28 01:13:20,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:20,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:20,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 01:13:20,366 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)] === [2024-06-28 01:13:20,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:20,366 INFO L85 PathProgramCache]: Analyzing trace with hash 663053889, now seen corresponding path program 4 times [2024-06-28 01:13:20,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:20,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125402520] [2024-06-28 01:13:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:20,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:20,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:20,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125402520] [2024-06-28 01:13:20,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125402520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:20,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:20,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:20,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640670261] [2024-06-28 01:13:20,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:20,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:20,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:20,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:20,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:20,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:20,624 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) [2024-06-28 01:13:20,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:20,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:20,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:20,961 INFO L124 PetriNetUnfolderBase]: 1153/1947 cut-off events. [2024-06-28 01:13:20,961 INFO L125 PetriNetUnfolderBase]: For 62521/62526 co-relation queries the response was YES. [2024-06-28 01:13:20,969 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. [2024-06-28 01:13:20,975 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 83 changer transitions 0/197 dead transitions. [2024-06-28 01:13:20,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 197 transitions, 3425 flow [2024-06-28 01:13:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-28 01:13:20,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106951871657754 [2024-06-28 01:13:20,980 INFO L175 Difference]: Start difference. First operand has 185 places, 153 transitions, 2720 flow. Second operand 11 states and 191 transitions. [2024-06-28 01:13:20,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 197 transitions, 3425 flow [2024-06-28 01:13:21,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 197 transitions, 3247 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 01:13:21,073 INFO L231 Difference]: Finished difference. Result has 186 places, 154 transitions, 2741 flow [2024-06-28 01:13:21,073 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} [2024-06-28 01:13:21,073 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 151 predicate places. [2024-06-28 01:13:21,073 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 154 transitions, 2741 flow [2024-06-28 01:13:21,074 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) [2024-06-28 01:13:21,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:21,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:21,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 01:13:21,074 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)] === [2024-06-28 01:13:21,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:21,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1507062269, now seen corresponding path program 5 times [2024-06-28 01:13:21,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:21,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042993451] [2024-06-28 01:13:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:21,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:21,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:21,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042993451] [2024-06-28 01:13:21,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042993451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:21,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:21,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52717657] [2024-06-28 01:13:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:21,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:21,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:21,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:21,352 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) [2024-06-28 01:13:21,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:21,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:21,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:21,682 INFO L124 PetriNetUnfolderBase]: 1207/2037 cut-off events. [2024-06-28 01:13:21,682 INFO L125 PetriNetUnfolderBase]: For 66993/66998 co-relation queries the response was YES. [2024-06-28 01:13:21,690 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. [2024-06-28 01:13:21,697 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 109 selfloop transitions, 79 changer transitions 0/195 dead transitions. [2024-06-28 01:13:21,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 195 transitions, 3434 flow [2024-06-28 01:13:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:21,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 01:13:21,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:21,700 INFO L175 Difference]: Start difference. First operand has 186 places, 154 transitions, 2741 flow. Second operand 11 states and 187 transitions. [2024-06-28 01:13:21,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 195 transitions, 3434 flow [2024-06-28 01:13:21,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 3270 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 01:13:21,793 INFO L231 Difference]: Finished difference. Result has 189 places, 155 transitions, 2768 flow [2024-06-28 01:13:21,793 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} [2024-06-28 01:13:21,793 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 154 predicate places. [2024-06-28 01:13:21,793 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 155 transitions, 2768 flow [2024-06-28 01:13:21,794 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) [2024-06-28 01:13:21,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:21,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:21,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 01:13:21,794 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)] === [2024-06-28 01:13:21,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:21,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1505159489, now seen corresponding path program 6 times [2024-06-28 01:13:21,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:21,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769363497] [2024-06-28 01:13:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:21,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:21,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:21,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769363497] [2024-06-28 01:13:21,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769363497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:21,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:21,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:21,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127986458] [2024-06-28 01:13:22,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:22,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:22,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:22,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:22,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:22,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:22,040 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) [2024-06-28 01:13:22,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:22,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:22,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:22,399 INFO L124 PetriNetUnfolderBase]: 1261/2127 cut-off events. [2024-06-28 01:13:22,400 INFO L125 PetriNetUnfolderBase]: For 72476/72476 co-relation queries the response was YES. [2024-06-28 01:13:22,408 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. [2024-06-28 01:13:22,415 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 113 selfloop transitions, 79 changer transitions 0/199 dead transitions. [2024-06-28 01:13:22,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 199 transitions, 3531 flow [2024-06-28 01:13:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-28 01:13:22,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053475935828877 [2024-06-28 01:13:22,416 INFO L175 Difference]: Start difference. First operand has 189 places, 155 transitions, 2768 flow. Second operand 11 states and 189 transitions. [2024-06-28 01:13:22,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 199 transitions, 3531 flow [2024-06-28 01:13:22,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 199 transitions, 3379 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 01:13:22,512 INFO L231 Difference]: Finished difference. Result has 193 places, 156 transitions, 2807 flow [2024-06-28 01:13:22,512 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} [2024-06-28 01:13:22,513 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 158 predicate places. [2024-06-28 01:13:22,513 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 156 transitions, 2807 flow [2024-06-28 01:13:22,513 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) [2024-06-28 01:13:22,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:22,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:22,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 01:13:22,514 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)] === [2024-06-28 01:13:22,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:22,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1589589163, now seen corresponding path program 7 times [2024-06-28 01:13:22,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:22,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86318435] [2024-06-28 01:13:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:22,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:22,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:22,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86318435] [2024-06-28 01:13:22,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86318435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:22,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:22,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:22,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462984816] [2024-06-28 01:13:22,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:22,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:22,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:22,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:22,777 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) [2024-06-28 01:13:22,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:22,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:22,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:23,165 INFO L124 PetriNetUnfolderBase]: 1315/2217 cut-off events. [2024-06-28 01:13:23,165 INFO L125 PetriNetUnfolderBase]: For 77949/77949 co-relation queries the response was YES. [2024-06-28 01:13:23,174 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. [2024-06-28 01:13:23,180 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 109 selfloop transitions, 81 changer transitions 0/197 dead transitions. [2024-06-28 01:13:23,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 3460 flow [2024-06-28 01:13:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 01:13:23,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:23,182 INFO L175 Difference]: Start difference. First operand has 193 places, 156 transitions, 2807 flow. Second operand 11 states and 187 transitions. [2024-06-28 01:13:23,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 3460 flow [2024-06-28 01:13:23,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 197 transitions, 3300 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:23,290 INFO L231 Difference]: Finished difference. Result has 195 places, 157 transitions, 2842 flow [2024-06-28 01:13:23,290 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} [2024-06-28 01:13:23,290 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 160 predicate places. [2024-06-28 01:13:23,290 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 157 transitions, 2842 flow [2024-06-28 01:13:23,291 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) [2024-06-28 01:13:23,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:23,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:23,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 01:13:23,291 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)] === [2024-06-28 01:13:23,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1795320043, now seen corresponding path program 8 times [2024-06-28 01:13:23,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:23,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134839995] [2024-06-28 01:13:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:23,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:23,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:23,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134839995] [2024-06-28 01:13:23,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134839995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:23,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:23,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:23,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111652352] [2024-06-28 01:13:23,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:23,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:23,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:23,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:23,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:23,577 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) [2024-06-28 01:13:23,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:23,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:23,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:23,991 INFO L124 PetriNetUnfolderBase]: 1369/2307 cut-off events. [2024-06-28 01:13:23,991 INFO L125 PetriNetUnfolderBase]: For 81661/81666 co-relation queries the response was YES. [2024-06-28 01:13:24,001 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. [2024-06-28 01:13:24,010 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 115 selfloop transitions, 79 changer transitions 0/201 dead transitions. [2024-06-28 01:13:24,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 201 transitions, 3521 flow [2024-06-28 01:13:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-28 01:13:24,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053475935828877 [2024-06-28 01:13:24,011 INFO L175 Difference]: Start difference. First operand has 195 places, 157 transitions, 2842 flow. Second operand 11 states and 189 transitions. [2024-06-28 01:13:24,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 201 transitions, 3521 flow [2024-06-28 01:13:24,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 201 transitions, 3357 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:24,131 INFO L231 Difference]: Finished difference. Result has 197 places, 158 transitions, 2869 flow [2024-06-28 01:13:24,131 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} [2024-06-28 01:13:24,131 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 162 predicate places. [2024-06-28 01:13:24,132 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 158 transitions, 2869 flow [2024-06-28 01:13:24,132 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) [2024-06-28 01:13:24,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:24,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:24,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 01:13:24,132 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)] === [2024-06-28 01:13:24,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1787992573, now seen corresponding path program 9 times [2024-06-28 01:13:24,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:24,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334900102] [2024-06-28 01:13:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:24,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:24,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:24,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334900102] [2024-06-28 01:13:24,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334900102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:24,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:24,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:24,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202211036] [2024-06-28 01:13:24,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:24,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:24,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:24,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:24,415 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) [2024-06-28 01:13:24,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:24,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:24,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:24,827 INFO L124 PetriNetUnfolderBase]: 1423/2397 cut-off events. [2024-06-28 01:13:24,827 INFO L125 PetriNetUnfolderBase]: For 86372/86377 co-relation queries the response was YES. [2024-06-28 01:13:24,835 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. [2024-06-28 01:13:24,841 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 82 changer transitions 0/199 dead transitions. [2024-06-28 01:13:24,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 199 transitions, 3570 flow [2024-06-28 01:13:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 01:13:24,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:24,843 INFO L175 Difference]: Start difference. First operand has 197 places, 158 transitions, 2869 flow. Second operand 11 states and 187 transitions. [2024-06-28 01:13:24,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 199 transitions, 3570 flow [2024-06-28 01:13:24,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 199 transitions, 3410 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:24,952 INFO L231 Difference]: Finished difference. Result has 199 places, 159 transitions, 2906 flow [2024-06-28 01:13:24,952 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} [2024-06-28 01:13:24,952 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 164 predicate places. [2024-06-28 01:13:24,953 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 159 transitions, 2906 flow [2024-06-28 01:13:24,953 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) [2024-06-28 01:13:24,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:24,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:24,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 01:13:24,953 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)] === [2024-06-28 01:13:24,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:24,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1787997223, now seen corresponding path program 10 times [2024-06-28 01:13:24,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:24,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336644088] [2024-06-28 01:13:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:24,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:25,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336644088] [2024-06-28 01:13:25,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336644088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:25,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:25,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937548047] [2024-06-28 01:13:25,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:25,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:25,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:25,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:25,195 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) [2024-06-28 01:13:25,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:25,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:25,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:25,585 INFO L124 PetriNetUnfolderBase]: 1477/2487 cut-off events. [2024-06-28 01:13:25,585 INFO L125 PetriNetUnfolderBase]: For 91994/91994 co-relation queries the response was YES. [2024-06-28 01:13:25,597 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. [2024-06-28 01:13:25,606 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 83 changer transitions 0/200 dead transitions. [2024-06-28 01:13:25,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 200 transitions, 3565 flow [2024-06-28 01:13:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 01:13:25,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:25,607 INFO L175 Difference]: Start difference. First operand has 199 places, 159 transitions, 2906 flow. Second operand 11 states and 187 transitions. [2024-06-28 01:13:25,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 200 transitions, 3565 flow [2024-06-28 01:13:25,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 200 transitions, 3402 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 01:13:25,770 INFO L231 Difference]: Finished difference. Result has 202 places, 160 transitions, 2942 flow [2024-06-28 01:13:25,771 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} [2024-06-28 01:13:25,771 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 167 predicate places. [2024-06-28 01:13:25,771 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 160 transitions, 2942 flow [2024-06-28 01:13:25,771 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) [2024-06-28 01:13:25,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:25,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:25,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 01:13:25,772 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)] === [2024-06-28 01:13:25,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:25,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2060737865, now seen corresponding path program 11 times [2024-06-28 01:13:25,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:25,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836198325] [2024-06-28 01:13:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:25,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:25,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836198325] [2024-06-28 01:13:25,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836198325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:25,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:25,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:25,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257047891] [2024-06-28 01:13:25,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:25,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:25,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:25,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:26,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:26,005 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) [2024-06-28 01:13:26,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:26,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:26,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:26,406 INFO L124 PetriNetUnfolderBase]: 1531/2573 cut-off events. [2024-06-28 01:13:26,406 INFO L125 PetriNetUnfolderBase]: For 95789/95795 co-relation queries the response was YES. [2024-06-28 01:13:26,418 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. [2024-06-28 01:13:26,427 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 112 selfloop transitions, 82 changer transitions 0/201 dead transitions. [2024-06-28 01:13:26,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 201 transitions, 3613 flow [2024-06-28 01:13:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-28 01:13:26,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49732620320855614 [2024-06-28 01:13:26,428 INFO L175 Difference]: Start difference. First operand has 202 places, 160 transitions, 2942 flow. Second operand 11 states and 186 transitions. [2024-06-28 01:13:26,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 201 transitions, 3613 flow [2024-06-28 01:13:26,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 201 transitions, 3445 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:26,565 INFO L231 Difference]: Finished difference. Result has 204 places, 161 transitions, 2971 flow [2024-06-28 01:13:26,565 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} [2024-06-28 01:13:26,565 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 169 predicate places. [2024-06-28 01:13:26,565 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 161 transitions, 2971 flow [2024-06-28 01:13:26,565 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) [2024-06-28 01:13:26,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:26,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:26,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 01:13:26,566 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)] === [2024-06-28 01:13:26,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1216537767, now seen corresponding path program 12 times [2024-06-28 01:13:26,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:26,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266841900] [2024-06-28 01:13:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:26,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:26,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:26,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266841900] [2024-06-28 01:13:26,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266841900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:26,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:26,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:26,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189917543] [2024-06-28 01:13:26,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:26,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:26,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:26,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:26,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:26,835 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) [2024-06-28 01:13:26,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:26,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:26,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:27,281 INFO L124 PetriNetUnfolderBase]: 1585/2663 cut-off events. [2024-06-28 01:13:27,282 INFO L125 PetriNetUnfolderBase]: For 100452/100452 co-relation queries the response was YES. [2024-06-28 01:13:27,295 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. [2024-06-28 01:13:27,305 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 85 changer transitions 0/199 dead transitions. [2024-06-28 01:13:27,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 199 transitions, 3664 flow [2024-06-28 01:13:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 01:13:27,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-28 01:13:27,306 INFO L175 Difference]: Start difference. First operand has 204 places, 161 transitions, 2971 flow. Second operand 11 states and 184 transitions. [2024-06-28 01:13:27,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 199 transitions, 3664 flow [2024-06-28 01:13:27,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 199 transitions, 3498 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:27,453 INFO L231 Difference]: Finished difference. Result has 206 places, 162 transitions, 3008 flow [2024-06-28 01:13:27,453 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} [2024-06-28 01:13:27,453 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 171 predicate places. [2024-06-28 01:13:27,453 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 162 transitions, 3008 flow [2024-06-28 01:13:27,453 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) [2024-06-28 01:13:27,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:27,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:27,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 01:13:27,454 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)] === [2024-06-28 01:13:27,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:27,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2053415045, now seen corresponding path program 13 times [2024-06-28 01:13:27,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:27,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230750287] [2024-06-28 01:13:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:27,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:27,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:27,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230750287] [2024-06-28 01:13:27,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230750287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:27,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:27,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:27,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765976717] [2024-06-28 01:13:27,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:27,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:27,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:27,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:27,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:27,709 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) [2024-06-28 01:13:27,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:27,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:27,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:28,135 INFO L124 PetriNetUnfolderBase]: 1639/2753 cut-off events. [2024-06-28 01:13:28,136 INFO L125 PetriNetUnfolderBase]: For 105155/105161 co-relation queries the response was YES. [2024-06-28 01:13:28,148 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. [2024-06-28 01:13:28,157 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 86 changer transitions 0/200 dead transitions. [2024-06-28 01:13:28,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 200 transitions, 3659 flow [2024-06-28 01:13:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 01:13:28,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-28 01:13:28,158 INFO L175 Difference]: Start difference. First operand has 206 places, 162 transitions, 3008 flow. Second operand 11 states and 184 transitions. [2024-06-28 01:13:28,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 200 transitions, 3659 flow [2024-06-28 01:13:28,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 200 transitions, 3487 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:28,306 INFO L231 Difference]: Finished difference. Result has 208 places, 163 transitions, 3041 flow [2024-06-28 01:13:28,306 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} [2024-06-28 01:13:28,306 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 173 predicate places. [2024-06-28 01:13:28,306 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 163 transitions, 3041 flow [2024-06-28 01:13:28,307 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) [2024-06-28 01:13:28,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:28,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:28,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 01:13:28,307 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)] === [2024-06-28 01:13:28,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:28,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1854887015, now seen corresponding path program 14 times [2024-06-28 01:13:28,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:28,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532558088] [2024-06-28 01:13:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:28,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:28,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532558088] [2024-06-28 01:13:28,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532558088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:28,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:28,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:28,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109217922] [2024-06-28 01:13:28,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:28,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:28,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:28,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:28,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:28,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:28,551 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) [2024-06-28 01:13:28,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:28,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:28,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:28,983 INFO L124 PetriNetUnfolderBase]: 1693/2843 cut-off events. [2024-06-28 01:13:28,983 INFO L125 PetriNetUnfolderBase]: For 108671/108671 co-relation queries the response was YES. [2024-06-28 01:13:28,997 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. [2024-06-28 01:13:29,006 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 87 changer transitions 0/204 dead transitions. [2024-06-28 01:13:29,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 204 transitions, 3806 flow [2024-06-28 01:13:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:29,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:29,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-28 01:13:29,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49732620320855614 [2024-06-28 01:13:29,007 INFO L175 Difference]: Start difference. First operand has 208 places, 163 transitions, 3041 flow. Second operand 11 states and 186 transitions. [2024-06-28 01:13:29,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 204 transitions, 3806 flow [2024-06-28 01:13:29,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 204 transitions, 3635 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 01:13:29,163 INFO L231 Difference]: Finished difference. Result has 211 places, 164 transitions, 3077 flow [2024-06-28 01:13:29,164 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} [2024-06-28 01:13:29,164 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 176 predicate places. [2024-06-28 01:13:29,164 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 164 transitions, 3077 flow [2024-06-28 01:13:29,164 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) [2024-06-28 01:13:29,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:29,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:29,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 01:13:29,164 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)] === [2024-06-28 01:13:29,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash 935607463, now seen corresponding path program 15 times [2024-06-28 01:13:29,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:29,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403791358] [2024-06-28 01:13:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:29,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:29,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:29,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403791358] [2024-06-28 01:13:29,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403791358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:29,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:29,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:29,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126244502] [2024-06-28 01:13:29,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:29,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:29,439 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) [2024-06-28 01:13:29,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:29,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:29,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:29,924 INFO L124 PetriNetUnfolderBase]: 1747/2933 cut-off events. [2024-06-28 01:13:29,925 INFO L125 PetriNetUnfolderBase]: For 114549/114549 co-relation queries the response was YES. [2024-06-28 01:13:29,939 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. [2024-06-28 01:13:29,948 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 106 selfloop transitions, 89 changer transitions 0/202 dead transitions. [2024-06-28 01:13:29,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 202 transitions, 3776 flow [2024-06-28 01:13:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 01:13:29,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-28 01:13:29,950 INFO L175 Difference]: Start difference. First operand has 211 places, 164 transitions, 3077 flow. Second operand 11 states and 184 transitions. [2024-06-28 01:13:29,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 202 transitions, 3776 flow [2024-06-28 01:13:30,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 202 transitions, 3600 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:30,127 INFO L231 Difference]: Finished difference. Result has 213 places, 165 transitions, 3112 flow [2024-06-28 01:13:30,127 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} [2024-06-28 01:13:30,128 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 178 predicate places. [2024-06-28 01:13:30,128 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 165 transitions, 3112 flow [2024-06-28 01:13:30,128 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) [2024-06-28 01:13:30,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:30,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:30,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 01:13:30,128 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)] === [2024-06-28 01:13:30,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash 935612113, now seen corresponding path program 16 times [2024-06-28 01:13:30,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:30,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360051180] [2024-06-28 01:13:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:30,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:30,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:30,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360051180] [2024-06-28 01:13:30,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360051180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:30,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:30,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:30,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860008629] [2024-06-28 01:13:30,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:30,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:30,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:30,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:30,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:30,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:30,405 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) [2024-06-28 01:13:30,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:30,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:30,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:30,955 INFO L124 PetriNetUnfolderBase]: 1801/3023 cut-off events. [2024-06-28 01:13:30,956 INFO L125 PetriNetUnfolderBase]: For 120542/120548 co-relation queries the response was YES. [2024-06-28 01:13:30,970 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. [2024-06-28 01:13:30,979 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 106 selfloop transitions, 90 changer transitions 0/203 dead transitions. [2024-06-28 01:13:30,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 203 transitions, 3769 flow [2024-06-28 01:13:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 01:13:30,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-28 01:13:30,980 INFO L175 Difference]: Start difference. First operand has 213 places, 165 transitions, 3112 flow. Second operand 11 states and 184 transitions. [2024-06-28 01:13:30,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 203 transitions, 3769 flow [2024-06-28 01:13:31,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 203 transitions, 3592 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 01:13:31,170 INFO L231 Difference]: Finished difference. Result has 216 places, 166 transitions, 3148 flow [2024-06-28 01:13:31,171 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} [2024-06-28 01:13:31,171 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 181 predicate places. [2024-06-28 01:13:31,171 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 166 transitions, 3148 flow [2024-06-28 01:13:31,171 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) [2024-06-28 01:13:31,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:31,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:31,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 01:13:31,172 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)] === [2024-06-28 01:13:31,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:31,172 INFO L85 PathProgramCache]: Analyzing trace with hash 341799513, now seen corresponding path program 17 times [2024-06-28 01:13:31,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:31,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75644772] [2024-06-28 01:13:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:31,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:31,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:31,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75644772] [2024-06-28 01:13:31,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75644772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:31,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:31,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:31,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900394261] [2024-06-28 01:13:31,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:31,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:31,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:31,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:31,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:31,418 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) [2024-06-28 01:13:31,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:31,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:31,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:31,963 INFO L124 PetriNetUnfolderBase]: 1855/3113 cut-off events. [2024-06-28 01:13:31,963 INFO L125 PetriNetUnfolderBase]: For 125466/125472 co-relation queries the response was YES. [2024-06-28 01:13:31,980 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. [2024-06-28 01:13:31,990 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 109 selfloop transitions, 91 changer transitions 0/207 dead transitions. [2024-06-28 01:13:31,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 207 transitions, 3831 flow [2024-06-28 01:13:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 01:13:31,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 01:13:31,991 INFO L175 Difference]: Start difference. First operand has 216 places, 166 transitions, 3148 flow. Second operand 11 states and 187 transitions. [2024-06-28 01:13:31,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 207 transitions, 3831 flow [2024-06-28 01:13:32,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 207 transitions, 3649 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:32,194 INFO L231 Difference]: Finished difference. Result has 218 places, 167 transitions, 3181 flow [2024-06-28 01:13:32,195 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} [2024-06-28 01:13:32,195 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 183 predicate places. [2024-06-28 01:13:32,195 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 167 transitions, 3181 flow [2024-06-28 01:13:32,196 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) [2024-06-28 01:13:32,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:32,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:32,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 01:13:32,196 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)] === [2024-06-28 01:13:32,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:32,196 INFO L85 PathProgramCache]: Analyzing trace with hash 334476693, now seen corresponding path program 18 times [2024-06-28 01:13:32,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:32,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731224863] [2024-06-28 01:13:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:32,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:32,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:32,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731224863] [2024-06-28 01:13:32,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731224863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:32,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:32,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:32,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205971144] [2024-06-28 01:13:32,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:32,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:32,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:32,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:32,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:32,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:32,448 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) [2024-06-28 01:13:32,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:32,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:32,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:33,050 INFO L124 PetriNetUnfolderBase]: 1909/3203 cut-off events. [2024-06-28 01:13:33,050 INFO L125 PetriNetUnfolderBase]: For 130317/130323 co-relation queries the response was YES. [2024-06-28 01:13:33,064 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. [2024-06-28 01:13:33,074 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 104 selfloop transitions, 94 changer transitions 0/205 dead transitions. [2024-06-28 01:13:33,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 205 transitions, 3842 flow [2024-06-28 01:13:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-28 01:13:33,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946524064171123 [2024-06-28 01:13:33,075 INFO L175 Difference]: Start difference. First operand has 218 places, 167 transitions, 3181 flow. Second operand 11 states and 185 transitions. [2024-06-28 01:13:33,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 205 transitions, 3842 flow [2024-06-28 01:13:33,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 205 transitions, 3658 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:33,258 INFO L231 Difference]: Finished difference. Result has 220 places, 168 transitions, 3218 flow [2024-06-28 01:13:33,258 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} [2024-06-28 01:13:33,259 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 185 predicate places. [2024-06-28 01:13:33,259 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 168 transitions, 3218 flow [2024-06-28 01:13:33,259 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) [2024-06-28 01:13:33,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:33,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:33,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 01:13:33,259 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)] === [2024-06-28 01:13:33,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 591150183, now seen corresponding path program 19 times [2024-06-28 01:13:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:33,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921180107] [2024-06-28 01:13:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:33,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:33,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921180107] [2024-06-28 01:13:33,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921180107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:33,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:33,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:33,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501363732] [2024-06-28 01:13:33,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:33,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:33,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:33,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:33,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:33,508 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) [2024-06-28 01:13:33,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:33,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:33,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:33,994 INFO L124 PetriNetUnfolderBase]: 1963/3296 cut-off events. [2024-06-28 01:13:33,994 INFO L125 PetriNetUnfolderBase]: For 133921/133927 co-relation queries the response was YES. [2024-06-28 01:13:34,011 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. [2024-06-28 01:13:34,073 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 93 changer transitions 0/207 dead transitions. [2024-06-28 01:13:34,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 207 transitions, 3897 flow [2024-06-28 01:13:34,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-28 01:13:34,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48663101604278075 [2024-06-28 01:13:34,074 INFO L175 Difference]: Start difference. First operand has 220 places, 168 transitions, 3218 flow. Second operand 11 states and 182 transitions. [2024-06-28 01:13:34,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 207 transitions, 3897 flow [2024-06-28 01:13:34,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 207 transitions, 3707 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:13:34,277 INFO L231 Difference]: Finished difference. Result has 222 places, 169 transitions, 3247 flow [2024-06-28 01:13:34,278 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} [2024-06-28 01:13:34,278 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 187 predicate places. [2024-06-28 01:13:34,278 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 169 transitions, 3247 flow [2024-06-28 01:13:34,278 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) [2024-06-28 01:13:34,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:34,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:34,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 01:13:34,279 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)] === [2024-06-28 01:13:34,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:34,279 INFO L85 PathProgramCache]: Analyzing trace with hash 334472043, now seen corresponding path program 20 times [2024-06-28 01:13:34,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:34,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475153685] [2024-06-28 01:13:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:34,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:34,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:34,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475153685] [2024-06-28 01:13:34,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475153685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:13:34,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:13:34,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:13:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687953808] [2024-06-28 01:13:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:13:34,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:13:34,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:34,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:13:34,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:13:34,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-28 01:13:34,518 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) [2024-06-28 01:13:34,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:34,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-28 01:13:34,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:35,017 INFO L124 PetriNetUnfolderBase]: 1945/3266 cut-off events. [2024-06-28 01:13:35,018 INFO L125 PetriNetUnfolderBase]: For 123664/123670 co-relation queries the response was YES. [2024-06-28 01:13:35,035 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. [2024-06-28 01:13:35,045 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 103 selfloop transitions, 95 changer transitions 0/205 dead transitions. [2024-06-28 01:13:35,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 205 transitions, 3821 flow [2024-06-28 01:13:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:13:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:13:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 01:13:35,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919786096256685 [2024-06-28 01:13:35,046 INFO L175 Difference]: Start difference. First operand has 222 places, 169 transitions, 3247 flow. Second operand 11 states and 184 transitions. [2024-06-28 01:13:35,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 205 transitions, 3821 flow [2024-06-28 01:13:35,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 205 transitions, 3540 flow, removed 0 selfloop flow, removed 40 redundant places. [2024-06-28 01:13:35,266 INFO L231 Difference]: Finished difference. Result has 191 places, 168 transitions, 3054 flow [2024-06-28 01:13:35,266 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} [2024-06-28 01:13:35,266 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 156 predicate places. [2024-06-28 01:13:35,267 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 168 transitions, 3054 flow [2024-06-28 01:13:35,267 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) [2024-06-28 01:13:35,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:35,267 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:35,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 01:13:35,267 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)] === [2024-06-28 01:13:35,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:35,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2008323973, now seen corresponding path program 2 times [2024-06-28 01:13:35,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:35,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215464584] [2024-06-28 01:13:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:35,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:35,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:35,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215464584] [2024-06-28 01:13:35,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215464584] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:13:35,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796578931] [2024-06-28 01:13:35,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:13:35,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:13:35,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:13:35,332 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) [2024-06-28 01:13:35,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-28 01:13:35,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:13:35,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:13:35,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-28 01:13:35,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:13:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:35,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:13:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:35,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796578931] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:13:35,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:13:35,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-06-28 01:13:35,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299130562] [2024-06-28 01:13:35,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:13:35,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-28 01:13:35,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-28 01:13:35,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-28 01:13:35,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-28 01:13:35,494 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) [2024-06-28 01:13:35,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:35,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-28 01:13:35,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:35,895 INFO L124 PetriNetUnfolderBase]: 1540/2812 cut-off events. [2024-06-28 01:13:35,895 INFO L125 PetriNetUnfolderBase]: For 100168/100460 co-relation queries the response was YES. [2024-06-28 01:13:35,909 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. [2024-06-28 01:13:35,923 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 122 selfloop transitions, 79 changer transitions 0/232 dead transitions. [2024-06-28 01:13:35,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 232 transitions, 4276 flow [2024-06-28 01:13:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 01:13:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 01:13:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 273 transitions. [2024-06-28 01:13:35,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6691176470588235 [2024-06-28 01:13:35,925 INFO L175 Difference]: Start difference. First operand has 191 places, 168 transitions, 3054 flow. Second operand 12 states and 273 transitions. [2024-06-28 01:13:35,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 232 transitions, 4276 flow [2024-06-28 01:13:36,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 232 transitions, 3259 flow, removed 0 selfloop flow, removed 22 redundant places. [2024-06-28 01:13:36,084 INFO L231 Difference]: Finished difference. Result has 186 places, 174 transitions, 2257 flow [2024-06-28 01:13:36,085 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} [2024-06-28 01:13:36,085 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 151 predicate places. [2024-06-28 01:13:36,085 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 174 transitions, 2257 flow [2024-06-28 01:13:36,085 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) [2024-06-28 01:13:36,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:36,085 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:36,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-28 01:13:36,295 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 [2024-06-28 01:13:36,296 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)] === [2024-06-28 01:13:36,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:36,296 INFO L85 PathProgramCache]: Analyzing trace with hash -198724229, now seen corresponding path program 3 times [2024-06-28 01:13:36,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:36,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320102385] [2024-06-28 01:13:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:36,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:36,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:36,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320102385] [2024-06-28 01:13:36,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320102385] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:13:36,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293508906] [2024-06-28 01:13:36,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:13:36,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:13:36,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:13:36,398 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) [2024-06-28 01:13:36,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-28 01:13:36,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-06-28 01:13:36,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:13:36,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-28 01:13:36,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:13:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:36,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:13:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:36,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293508906] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:13:36,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:13:36,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2024-06-28 01:13:36,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727473115] [2024-06-28 01:13:36,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:13:36,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-28 01:13:36,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:36,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-28 01:13:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-06-28 01:13:36,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-28 01:13:36,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 174 transitions, 2257 flow. Second operand has 19 states, 19 states have (on average 16.526315789473685) internal successors, (314), 19 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:13:36,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:36,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-28 01:13:36,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:13:37,006 INFO L124 PetriNetUnfolderBase]: 1684/3046 cut-off events. [2024-06-28 01:13:37,006 INFO L125 PetriNetUnfolderBase]: For 79399/79697 co-relation queries the response was YES. [2024-06-28 01:13:37,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19100 conditions, 3046 events. 1684/3046 cut-off events. For 79399/79697 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19099 event pairs, 638 based on Foata normal form. 105/3003 useless extension candidates. Maximal degree in co-relation 19017. Up to 1416 conditions per place. [2024-06-28 01:13:37,031 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 158 selfloop transitions, 85 changer transitions 0/274 dead transitions. [2024-06-28 01:13:37,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 274 transitions, 4055 flow [2024-06-28 01:13:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-28 01:13:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-28 01:13:37,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 405 transitions. [2024-06-28 01:13:37,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2024-06-28 01:13:37,033 INFO L175 Difference]: Start difference. First operand has 186 places, 174 transitions, 2257 flow. Second operand 18 states and 405 transitions. [2024-06-28 01:13:37,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 274 transitions, 4055 flow [2024-06-28 01:13:37,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 274 transitions, 3834 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-06-28 01:13:37,163 INFO L231 Difference]: Finished difference. Result has 196 places, 180 transitions, 2280 flow [2024-06-28 01:13:37,163 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=18, PETRI_FLOW=2280, PETRI_PLACES=196, PETRI_TRANSITIONS=180} [2024-06-28 01:13:37,163 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 161 predicate places. [2024-06-28 01:13:37,163 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 180 transitions, 2280 flow [2024-06-28 01:13:37,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.526315789473685) internal successors, (314), 19 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:13:37,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:13:37,164 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:13:37,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-28 01:13:37,368 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 [2024-06-28 01:13:37,368 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)] === [2024-06-28 01:13:37,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:13:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1255555707, now seen corresponding path program 4 times [2024-06-28 01:13:37,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:13:37,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618486940] [2024-06-28 01:13:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:13:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:13:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:13:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:38,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:13:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618486940] [2024-06-28 01:13:38,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618486940] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:13:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227175557] [2024-06-28 01:13:38,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:13:38,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:13:38,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:13:38,084 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) [2024-06-28 01:13:38,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-28 01:13:38,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:13:38,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:13:38,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 59 conjunts are in the unsatisfiable core [2024-06-28 01:13:38,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:13:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:38,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:13:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:13:39,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227175557] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:13:39,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:13:39,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 66 [2024-06-28 01:13:39,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996815414] [2024-06-28 01:13:39,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:13:39,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-06-28 01:13:39,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:13:39,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-06-28 01:13:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=3797, Unknown=0, NotChecked=0, Total=4422 [2024-06-28 01:13:40,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-06-28 01:13:40,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 180 transitions, 2280 flow. Second operand has 67 states, 67 states have (on average 9.343283582089553) internal successors, (626), 67 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:13:40,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:13:40,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-06-28 01:13:40,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:14:05,256 INFO L124 PetriNetUnfolderBase]: 31969/52540 cut-off events. [2024-06-28 01:14:05,256 INFO L125 PetriNetUnfolderBase]: For 966365/966370 co-relation queries the response was YES. [2024-06-28 01:14:05,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304388 conditions, 52540 events. 31969/52540 cut-off events. For 966365/966370 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 383516 event pairs, 411 based on Foata normal form. 0/52171 useless extension candidates. Maximal degree in co-relation 304297. Up to 15631 conditions per place. [2024-06-28 01:14:05,872 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 861 selfloop transitions, 1255 changer transitions 789/2909 dead transitions. [2024-06-28 01:14:05,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 2909 transitions, 37876 flow [2024-06-28 01:14:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2024-06-28 01:14:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2024-06-28 01:14:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 3244 transitions. [2024-06-28 01:14:05,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843236787100627 [2024-06-28 01:14:05,876 INFO L175 Difference]: Start difference. First operand has 196 places, 180 transitions, 2280 flow. Second operand 197 states and 3244 transitions. [2024-06-28 01:14:05,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 2909 transitions, 37876 flow [2024-06-28 01:14:07,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 2909 transitions, 35239 flow, removed 494 selfloop flow, removed 12 redundant places. [2024-06-28 01:14:07,998 INFO L231 Difference]: Finished difference. Result has 458 places, 1411 transitions, 17319 flow [2024-06-28 01:14:07,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=197, PETRI_FLOW=17319, PETRI_PLACES=458, PETRI_TRANSITIONS=1411} [2024-06-28 01:14:07,999 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 423 predicate places. [2024-06-28 01:14:07,999 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1411 transitions, 17319 flow [2024-06-28 01:14:08,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 9.343283582089553) internal successors, (626), 67 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:14:08,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:14:08,000 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:14:08,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-28 01:14:08,211 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 [2024-06-28 01:14:08,212 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)] === [2024-06-28 01:14:08,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:14:08,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2008808025, now seen corresponding path program 1 times [2024-06-28 01:14:08,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:14:08,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558251497] [2024-06-28 01:14:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:14:08,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:14:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:14:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:14:09,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:14:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558251497] [2024-06-28 01:14:09,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558251497] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:14:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152951797] [2024-06-28 01:14:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:14:09,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:14:09,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:14:09,063 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) [2024-06-28 01:14:09,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-28 01:14:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:14:09,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 61 conjunts are in the unsatisfiable core [2024-06-28 01:14:09,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:14:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:14:10,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:14:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:14:11,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152951797] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:14:11,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:14:11,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2024-06-28 01:14:11,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972436132] [2024-06-28 01:14:11,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:14:11,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-06-28 01:14:11,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:14:11,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-06-28 01:14:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=4745, Unknown=0, NotChecked=0, Total=5402 [2024-06-28 01:14:12,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-06-28 01:14:12,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1411 transitions, 17319 flow. Second operand has 74 states, 74 states have (on average 9.378378378378379) internal successors, (694), 74 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:14:12,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:14:12,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-06-28 01:14:12,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand