./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe034_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe034_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe034_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe034_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:14:11,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:14:11,379 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:14:11,383 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:14:11,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:14:11,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:14:11,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:14:11,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:14:11,430 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:14:11,433 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:14:11,433 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:14:11,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:14:11,434 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:14:11,435 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:14:11,435 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:14:11,435 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:14:11,436 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:14:11,436 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:14:11,436 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:14:11,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:14:11,437 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:14:11,437 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:14:11,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:14:11,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:14:11,438 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:14:11,438 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:14:11,438 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:14:11,438 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:14:11,439 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:14:11,439 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:14:11,440 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:14:11,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:14:11,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:14:11,440 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:14:11,452 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:14:11,452 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:14:11,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:14:11,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:14:11,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:14:11,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:14:11,453 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:14:11,453 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:14:11,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:14:11,454 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:14:11,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:14:11,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:14:11,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:14:11,841 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:14:11,841 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:14:11,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe034_tso.i [2024-06-21 18:14:13,530 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:14:13,737 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:14:13,738 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe034_tso.i [2024-06-21 18:14:13,748 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8721e20f9/738c0e91b62a49afb72a8613ad0c660d/FLAG48a06292d [2024-06-21 18:14:13,758 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8721e20f9/738c0e91b62a49afb72a8613ad0c660d [2024-06-21 18:14:13,760 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:14:13,760 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:14:13,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe034_tso.yml/witness.yml [2024-06-21 18:14:13,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:14:13,812 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:14:13,813 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:14:13,813 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:14:13,817 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:14:13,817 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:14:13" (1/2) ... [2024-06-21 18:14:13,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2364f5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:13, skipping insertion in model container [2024-06-21 18:14:13,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:14:13" (1/2) ... [2024-06-21 18:14:13,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1f92d8b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:14:13, skipping insertion in model container [2024-06-21 18:14:13,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:14:13" (2/2) ... [2024-06-21 18:14:13,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2364f5cd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:13, skipping insertion in model container [2024-06-21 18:14:13,820 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:14:13" (2/2) ... [2024-06-21 18:14:13,820 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:14:13,852 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:14:13,853 INFO L97 edCorrectnessWitness]: Location invariant before [L787-L787] ! multithreaded || ((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) [2024-06-21 18:14:13,854 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ! multithreaded || ((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) [2024-06-21 18:14:13,855 INFO L97 edCorrectnessWitness]: Location invariant before [L788-L788] ! multithreaded || ((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) [2024-06-21 18:14:13,855 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:14:13,855 INFO L106 edCorrectnessWitness]: ghost_update [L783-L783] multithreaded = 1; [2024-06-21 18:14:13,893 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:14:14,191 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:14:14,205 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:14:14,276 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:14:14,310 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:14:14,310 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14 WrapperNode [2024-06-21 18:14:14,311 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:14:14,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:14:14,311 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:14:14,312 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:14:14,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,331 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,350 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-21 18:14:14,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:14:14,351 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:14:14,351 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:14:14,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:14:14,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,373 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,384 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:14:14,384 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,384 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,387 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:14:14,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:14:14,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:14:14,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:14:14,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (1/1) ... [2024-06-21 18:14:14,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:14:14,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:14:14,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 18:14:14,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 18:14:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:14:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:14:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:14:14,571 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:14:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:14:14,571 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:14:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:14:14,572 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:14:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:14:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:14:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:14:14,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:14:14,574 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:14:14,700 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:14:14,703 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:14:14,835 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:14:14,835 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:14:14,904 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:14:14,904 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:14:14,905 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:14:14 BoogieIcfgContainer [2024-06-21 18:14:14,905 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:14:14,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:14:14,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:14:14,909 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:14:14,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:14:13" (1/4) ... [2024-06-21 18:14:14,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b4d508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:14:14, skipping insertion in model container [2024-06-21 18:14:14,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:14:13" (2/4) ... [2024-06-21 18:14:14,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b4d508 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:14:14, skipping insertion in model container [2024-06-21 18:14:14,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:14:14" (3/4) ... [2024-06-21 18:14:14,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b4d508 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:14:14, skipping insertion in model container [2024-06-21 18:14:14,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:14:14" (4/4) ... [2024-06-21 18:14:14,912 INFO L112 eAbstractionObserver]: Analyzing ICFG safe034_tso.i [2024-06-21 18:14:14,926 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:14:14,927 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:14:14,927 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:14:14,957 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:14:14,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 18:14:15,007 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 18:14:15,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:14:15,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:14:15,010 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 18:14:15,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 18:14:15,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:14:15,026 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;@5c975e2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:14:15,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:14:15,029 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:14:15,029 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:14:15,029 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:14:15,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:15,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:14:15,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:15,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:15,056 INFO L85 PathProgramCache]: Analyzing trace with hash 220444948, now seen corresponding path program 1 times [2024-06-21 18:14:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:15,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062677307] [2024-06-21 18:14:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:15,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:15,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:15,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062677307] [2024-06-21 18:14:15,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062677307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:15,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:15,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:14:15,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934152898] [2024-06-21 18:14:15,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:15,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:14:15,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:15,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:14:15,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:14:15,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 42 [2024-06-21 18:14:15,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:15,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:15,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 42 [2024-06-21 18:14:15,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:15,472 INFO L124 PetriNetUnfolderBase]: 105/273 cut-off events. [2024-06-21 18:14:15,473 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 18:14:15,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 273 events. 105/273 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1540 event pairs, 33 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 470. Up to 163 conditions per place. [2024-06-21 18:14:15,478 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 20 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-06-21 18:14:15,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 136 flow [2024-06-21 18:14:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:14:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:14:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-21 18:14:15,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.753968253968254 [2024-06-21 18:14:15,489 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 95 transitions. [2024-06-21 18:14:15,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 136 flow [2024-06-21 18:14:15,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 132 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:15,493 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 91 flow [2024-06-21 18:14:15,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2024-06-21 18:14:15,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2024-06-21 18:14:15,498 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 91 flow [2024-06-21 18:14:15,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:15,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:15,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:15,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:14:15,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:15,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:15,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1842982080, now seen corresponding path program 1 times [2024-06-21 18:14:15,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:15,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518531759] [2024-06-21 18:14:15,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:15,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:15,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:15,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518531759] [2024-06-21 18:14:15,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518531759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:15,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:15,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:14:15,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996241330] [2024-06-21 18:14:15,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:15,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:14:15,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:14:15,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:14:15,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 42 [2024-06-21 18:14:15,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:15,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:15,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 42 [2024-06-21 18:14:15,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:15,793 INFO L124 PetriNetUnfolderBase]: 169/434 cut-off events. [2024-06-21 18:14:15,793 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-21 18:14:15,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 434 events. 169/434 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2452 event pairs, 61 based on Foata normal form. 4/413 useless extension candidates. Maximal degree in co-relation 841. Up to 260 conditions per place. [2024-06-21 18:14:15,797 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 30 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2024-06-21 18:14:15,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 211 flow [2024-06-21 18:14:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:14:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:14:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-21 18:14:15,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2024-06-21 18:14:15,799 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 91 flow. Second operand 4 states and 124 transitions. [2024-06-21 18:14:15,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 211 flow [2024-06-21 18:14:15,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:14:15,800 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 135 flow [2024-06-21 18:14:15,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 18:14:15,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 18:14:15,801 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 135 flow [2024-06-21 18:14:15,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:15,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:15,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:15,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:14:15,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:15,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:15,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1821827193, now seen corresponding path program 1 times [2024-06-21 18:14:15,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:15,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651764473] [2024-06-21 18:14:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:15,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:15,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:15,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651764473] [2024-06-21 18:14:15,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651764473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:15,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:15,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:14:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964903840] [2024-06-21 18:14:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:15,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:14:15,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:14:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:14:15,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 42 [2024-06-21 18:14:15,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:15,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:15,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 42 [2024-06-21 18:14:15,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:16,044 INFO L124 PetriNetUnfolderBase]: 194/480 cut-off events. [2024-06-21 18:14:16,044 INFO L125 PetriNetUnfolderBase]: For 191/194 co-relation queries the response was YES. [2024-06-21 18:14:16,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 480 events. 194/480 cut-off events. For 191/194 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2735 event pairs, 66 based on Foata normal form. 6/464 useless extension candidates. Maximal degree in co-relation 1017. Up to 276 conditions per place. [2024-06-21 18:14:16,048 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 24 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2024-06-21 18:14:16,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 213 flow [2024-06-21 18:14:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:14:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:14:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-21 18:14:16,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-06-21 18:14:16,052 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 135 flow. Second operand 4 states and 116 transitions. [2024-06-21 18:14:16,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 213 flow [2024-06-21 18:14:16,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 211 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 18:14:16,056 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 150 flow [2024-06-21 18:14:16,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2024-06-21 18:14:16,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 18:14:16,058 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 150 flow [2024-06-21 18:14:16,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:16,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:16,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:14:16,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:16,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:16,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1740858302, now seen corresponding path program 1 times [2024-06-21 18:14:16,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:16,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269051722] [2024-06-21 18:14:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:16,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:16,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:16,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269051722] [2024-06-21 18:14:16,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269051722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:16,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:16,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:14:16,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639076979] [2024-06-21 18:14:16,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:16,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:14:16,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:14:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:14:16,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 42 [2024-06-21 18:14:16,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:16,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 42 [2024-06-21 18:14:16,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:16,227 INFO L124 PetriNetUnfolderBase]: 180/457 cut-off events. [2024-06-21 18:14:16,227 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2024-06-21 18:14:16,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1075 conditions, 457 events. 180/457 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2771 event pairs, 24 based on Foata normal form. 8/442 useless extension candidates. Maximal degree in co-relation 1057. Up to 209 conditions per place. [2024-06-21 18:14:16,230 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 28 selfloop transitions, 8 changer transitions 0/51 dead transitions. [2024-06-21 18:14:16,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 254 flow [2024-06-21 18:14:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:14:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:14:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-21 18:14:16,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7321428571428571 [2024-06-21 18:14:16,232 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 150 flow. Second operand 4 states and 123 transitions. [2024-06-21 18:14:16,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 254 flow [2024-06-21 18:14:16,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 243 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 18:14:16,234 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 172 flow [2024-06-21 18:14:16,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-06-21 18:14:16,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 18:14:16,235 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 172 flow [2024-06-21 18:14:16,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:16,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:16,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:14:16,236 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:16,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1512779522, now seen corresponding path program 2 times [2024-06-21 18:14:16,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:16,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259598299] [2024-06-21 18:14:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:16,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:16,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:16,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259598299] [2024-06-21 18:14:16,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259598299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:16,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:16,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:14:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133694643] [2024-06-21 18:14:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:16,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:14:16,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:14:16,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:14:16,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 42 [2024-06-21 18:14:16,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:16,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 42 [2024-06-21 18:14:16,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:16,391 INFO L124 PetriNetUnfolderBase]: 168/427 cut-off events. [2024-06-21 18:14:16,391 INFO L125 PetriNetUnfolderBase]: For 468/468 co-relation queries the response was YES. [2024-06-21 18:14:16,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 427 events. 168/427 cut-off events. For 468/468 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2492 event pairs, 25 based on Foata normal form. 8/418 useless extension candidates. Maximal degree in co-relation 1025. Up to 143 conditions per place. [2024-06-21 18:14:16,394 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 29 selfloop transitions, 9 changer transitions 0/53 dead transitions. [2024-06-21 18:14:16,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 53 transitions, 272 flow [2024-06-21 18:14:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:14:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:14:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-21 18:14:16,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-21 18:14:16,396 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 172 flow. Second operand 5 states and 147 transitions. [2024-06-21 18:14:16,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 53 transitions, 272 flow [2024-06-21 18:14:16,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 255 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 18:14:16,398 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 169 flow [2024-06-21 18:14:16,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2024-06-21 18:14:16,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-21 18:14:16,399 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 169 flow [2024-06-21 18:14:16,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:16,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:16,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:14:16,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:16,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash -493810952, now seen corresponding path program 1 times [2024-06-21 18:14:16,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:16,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047755722] [2024-06-21 18:14:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:16,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:16,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:16,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047755722] [2024-06-21 18:14:16,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047755722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:16,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:16,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:14:16,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332807247] [2024-06-21 18:14:16,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:16,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:14:16,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:16,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:14:16,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:14:16,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:16,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:16,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:16,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:16,542 INFO L124 PetriNetUnfolderBase]: 254/594 cut-off events. [2024-06-21 18:14:16,542 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-06-21 18:14:16,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 594 events. 254/594 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3526 event pairs, 87 based on Foata normal form. 2/571 useless extension candidates. Maximal degree in co-relation 1440. Up to 384 conditions per place. [2024-06-21 18:14:16,546 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 38 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2024-06-21 18:14:16,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 352 flow [2024-06-21 18:14:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:14:16,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:14:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-21 18:14:16,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-21 18:14:16,547 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 169 flow. Second operand 5 states and 147 transitions. [2024-06-21 18:14:16,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 352 flow [2024-06-21 18:14:16,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 329 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:16,550 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 233 flow [2024-06-21 18:14:16,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-06-21 18:14:16,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-21 18:14:16,550 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 233 flow [2024-06-21 18:14:16,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:16,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:16,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:14:16,551 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:16,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash -455777672, now seen corresponding path program 2 times [2024-06-21 18:14:16,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:16,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603554257] [2024-06-21 18:14:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:16,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:16,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:16,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603554257] [2024-06-21 18:14:16,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603554257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:16,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:16,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:14:16,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311917355] [2024-06-21 18:14:16,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:16,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:14:16,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:16,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:14:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:14:16,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:16,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:16,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:16,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:16,724 INFO L124 PetriNetUnfolderBase]: 249/585 cut-off events. [2024-06-21 18:14:16,724 INFO L125 PetriNetUnfolderBase]: For 748/748 co-relation queries the response was YES. [2024-06-21 18:14:16,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1542 conditions, 585 events. 249/585 cut-off events. For 748/748 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3469 event pairs, 89 based on Foata normal form. 2/563 useless extension candidates. Maximal degree in co-relation 1519. Up to 380 conditions per place. [2024-06-21 18:14:16,743 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 33 selfloop transitions, 12 changer transitions 0/59 dead transitions. [2024-06-21 18:14:16,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 354 flow [2024-06-21 18:14:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:14:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:14:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-21 18:14:16,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.680952380952381 [2024-06-21 18:14:16,745 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 233 flow. Second operand 5 states and 143 transitions. [2024-06-21 18:14:16,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 354 flow [2024-06-21 18:14:16,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 352 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 18:14:16,748 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 265 flow [2024-06-21 18:14:16,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2024-06-21 18:14:16,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-21 18:14:16,750 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 265 flow [2024-06-21 18:14:16,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:16,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:16,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:14:16,750 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:16,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:16,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1194431257, now seen corresponding path program 1 times [2024-06-21 18:14:16,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:16,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670100215] [2024-06-21 18:14:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:16,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670100215] [2024-06-21 18:14:16,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670100215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:16,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:16,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:16,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539947156] [2024-06-21 18:14:16,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:16,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:16,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:16,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:16,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:16,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:16,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 265 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:16,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:16,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:16,976 INFO L124 PetriNetUnfolderBase]: 261/618 cut-off events. [2024-06-21 18:14:16,976 INFO L125 PetriNetUnfolderBase]: For 939/939 co-relation queries the response was YES. [2024-06-21 18:14:16,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1680 conditions, 618 events. 261/618 cut-off events. For 939/939 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3730 event pairs, 87 based on Foata normal form. 4/596 useless extension candidates. Maximal degree in co-relation 1654. Up to 386 conditions per place. [2024-06-21 18:14:16,980 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 44 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-21 18:14:16,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 425 flow [2024-06-21 18:14:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-21 18:14:16,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-06-21 18:14:16,983 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 265 flow. Second operand 6 states and 172 transitions. [2024-06-21 18:14:16,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 425 flow [2024-06-21 18:14:16,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 412 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 18:14:16,987 INFO L231 Difference]: Finished difference. Result has 68 places, 49 transitions, 284 flow [2024-06-21 18:14:16,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=68, PETRI_TRANSITIONS=49} [2024-06-21 18:14:16,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-21 18:14:16,990 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 49 transitions, 284 flow [2024-06-21 18:14:16,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:16,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:16,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:14:16,991 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:16,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:16,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2105902857, now seen corresponding path program 2 times [2024-06-21 18:14:16,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:16,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667566884] [2024-06-21 18:14:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:16,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:17,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667566884] [2024-06-21 18:14:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667566884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:17,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:17,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:17,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628555975] [2024-06-21 18:14:17,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:17,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:17,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:17,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:17,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:17,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:17,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 49 transitions, 284 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:17,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:17,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:17,184 INFO L124 PetriNetUnfolderBase]: 273/639 cut-off events. [2024-06-21 18:14:17,185 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-06-21 18:14:17,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 639 events. 273/639 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3871 event pairs, 87 based on Foata normal form. 4/621 useless extension candidates. Maximal degree in co-relation 1758. Up to 346 conditions per place. [2024-06-21 18:14:17,188 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 42 selfloop transitions, 15 changer transitions 0/71 dead transitions. [2024-06-21 18:14:17,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 468 flow [2024-06-21 18:14:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 18:14:17,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865079365079365 [2024-06-21 18:14:17,210 INFO L175 Difference]: Start difference. First operand has 68 places, 49 transitions, 284 flow. Second operand 6 states and 173 transitions. [2024-06-21 18:14:17,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 468 flow [2024-06-21 18:14:17,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 424 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:17,214 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 282 flow [2024-06-21 18:14:17,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2024-06-21 18:14:17,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-21 18:14:17,215 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 282 flow [2024-06-21 18:14:17,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:17,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:17,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:14:17,216 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:17,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash 505108825, now seen corresponding path program 3 times [2024-06-21 18:14:17,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:17,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873011132] [2024-06-21 18:14:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:17,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:17,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:17,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873011132] [2024-06-21 18:14:17,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873011132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:17,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:17,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:17,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709798924] [2024-06-21 18:14:17,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:17,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:17,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:17,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:17,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:17,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:17,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:17,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:17,390 INFO L124 PetriNetUnfolderBase]: 265/625 cut-off events. [2024-06-21 18:14:17,390 INFO L125 PetriNetUnfolderBase]: For 1249/1249 co-relation queries the response was YES. [2024-06-21 18:14:17,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 625 events. 265/625 cut-off events. For 1249/1249 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3816 event pairs, 93 based on Foata normal form. 4/605 useless extension candidates. Maximal degree in co-relation 1691. Up to 342 conditions per place. [2024-06-21 18:14:17,394 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 37 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2024-06-21 18:14:17,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 422 flow [2024-06-21 18:14:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-21 18:14:17,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6706349206349206 [2024-06-21 18:14:17,395 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 282 flow. Second operand 6 states and 169 transitions. [2024-06-21 18:14:17,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 422 flow [2024-06-21 18:14:17,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 394 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:17,398 INFO L231 Difference]: Finished difference. Result has 71 places, 50 transitions, 288 flow [2024-06-21 18:14:17,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=71, PETRI_TRANSITIONS=50} [2024-06-21 18:14:17,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 18:14:17,399 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 50 transitions, 288 flow [2024-06-21 18:14:17,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:17,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:17,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:14:17,400 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:17,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1824155426, now seen corresponding path program 1 times [2024-06-21 18:14:17,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:17,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697147281] [2024-06-21 18:14:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:17,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:17,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:17,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697147281] [2024-06-21 18:14:17,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697147281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:17,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:17,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:17,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196929814] [2024-06-21 18:14:17,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:17,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:17,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:17,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:17,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:17,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:17,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 288 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:17,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:17,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:17,562 INFO L124 PetriNetUnfolderBase]: 297/683 cut-off events. [2024-06-21 18:14:17,562 INFO L125 PetriNetUnfolderBase]: For 1526/1526 co-relation queries the response was YES. [2024-06-21 18:14:17,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 683 events. 297/683 cut-off events. For 1526/1526 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4259 event pairs, 64 based on Foata normal form. 4/661 useless extension candidates. Maximal degree in co-relation 1855. Up to 343 conditions per place. [2024-06-21 18:14:17,566 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 40 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-21 18:14:17,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 466 flow [2024-06-21 18:14:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:14:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:14:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-21 18:14:17,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-06-21 18:14:17,568 INFO L175 Difference]: Start difference. First operand has 71 places, 50 transitions, 288 flow. Second operand 5 states and 146 transitions. [2024-06-21 18:14:17,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 466 flow [2024-06-21 18:14:17,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 419 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:17,571 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 307 flow [2024-06-21 18:14:17,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2024-06-21 18:14:17,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 18:14:17,572 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 307 flow [2024-06-21 18:14:17,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:17,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:17,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:14:17,572 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:17,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:17,573 INFO L85 PathProgramCache]: Analyzing trace with hash -830213028, now seen corresponding path program 2 times [2024-06-21 18:14:17,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:17,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535157641] [2024-06-21 18:14:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:17,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:17,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535157641] [2024-06-21 18:14:17,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535157641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:17,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:17,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:17,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640085805] [2024-06-21 18:14:17,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:17,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:17,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:17,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:17,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:17,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:17,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 307 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:17,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:17,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:17,755 INFO L124 PetriNetUnfolderBase]: 289/674 cut-off events. [2024-06-21 18:14:17,755 INFO L125 PetriNetUnfolderBase]: For 1630/1630 co-relation queries the response was YES. [2024-06-21 18:14:17,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 674 events. 289/674 cut-off events. For 1630/1630 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4203 event pairs, 54 based on Foata normal form. 4/658 useless extension candidates. Maximal degree in co-relation 1852. Up to 339 conditions per place. [2024-06-21 18:14:17,759 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 41 selfloop transitions, 18 changer transitions 0/73 dead transitions. [2024-06-21 18:14:17,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 73 transitions, 474 flow [2024-06-21 18:14:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 18:14:17,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-21 18:14:17,761 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 307 flow. Second operand 7 states and 195 transitions. [2024-06-21 18:14:17,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 73 transitions, 474 flow [2024-06-21 18:14:17,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 462 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:14:17,764 INFO L231 Difference]: Finished difference. Result has 76 places, 54 transitions, 345 flow [2024-06-21 18:14:17,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=345, PETRI_PLACES=76, PETRI_TRANSITIONS=54} [2024-06-21 18:14:17,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 18:14:17,765 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 54 transitions, 345 flow [2024-06-21 18:14:17,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:17,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:17,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:14:17,766 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:17,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:17,766 INFO L85 PathProgramCache]: Analyzing trace with hash -135662410, now seen corresponding path program 3 times [2024-06-21 18:14:17,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:17,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115505015] [2024-06-21 18:14:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:17,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:17,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:17,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115505015] [2024-06-21 18:14:17,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115505015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:17,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:17,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:17,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281052412] [2024-06-21 18:14:17,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:17,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:17,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:17,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:17,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:17,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 54 transitions, 345 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:17,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:17,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:17,917 INFO L124 PetriNetUnfolderBase]: 301/687 cut-off events. [2024-06-21 18:14:17,917 INFO L125 PetriNetUnfolderBase]: For 1811/1811 co-relation queries the response was YES. [2024-06-21 18:14:17,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 687 events. 301/687 cut-off events. For 1811/1811 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4244 event pairs, 51 based on Foata normal form. 4/665 useless extension candidates. Maximal degree in co-relation 1970. Up to 297 conditions per place. [2024-06-21 18:14:17,921 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 47 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2024-06-21 18:14:17,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 551 flow [2024-06-21 18:14:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 18:14:17,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865079365079365 [2024-06-21 18:14:17,923 INFO L175 Difference]: Start difference. First operand has 76 places, 54 transitions, 345 flow. Second operand 6 states and 173 transitions. [2024-06-21 18:14:17,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 551 flow [2024-06-21 18:14:17,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 508 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:17,926 INFO L231 Difference]: Finished difference. Result has 77 places, 56 transitions, 357 flow [2024-06-21 18:14:17,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=77, PETRI_TRANSITIONS=56} [2024-06-21 18:14:17,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-21 18:14:17,927 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 56 transitions, 357 flow [2024-06-21 18:14:17,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:17,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:17,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:14:17,928 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:17,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash -196623178, now seen corresponding path program 4 times [2024-06-21 18:14:17,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:17,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372791123] [2024-06-21 18:14:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:17,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:17,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:17,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372791123] [2024-06-21 18:14:17,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372791123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:17,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:17,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697203651] [2024-06-21 18:14:17,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:17,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:18,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:18,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 56 transitions, 357 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:18,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:18,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:18,094 INFO L124 PetriNetUnfolderBase]: 313/727 cut-off events. [2024-06-21 18:14:18,094 INFO L125 PetriNetUnfolderBase]: For 1872/1872 co-relation queries the response was YES. [2024-06-21 18:14:18,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2141 conditions, 727 events. 313/727 cut-off events. For 1872/1872 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4628 event pairs, 48 based on Foata normal form. 4/705 useless extension candidates. Maximal degree in co-relation 2110. Up to 305 conditions per place. [2024-06-21 18:14:18,098 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 44 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-21 18:14:18,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 550 flow [2024-06-21 18:14:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-21 18:14:18,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-06-21 18:14:18,100 INFO L175 Difference]: Start difference. First operand has 77 places, 56 transitions, 357 flow. Second operand 6 states and 170 transitions. [2024-06-21 18:14:18,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 550 flow [2024-06-21 18:14:18,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 506 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 18:14:18,104 INFO L231 Difference]: Finished difference. Result has 79 places, 57 transitions, 360 flow [2024-06-21 18:14:18,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=79, PETRI_TRANSITIONS=57} [2024-06-21 18:14:18,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-21 18:14:18,105 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 57 transitions, 360 flow [2024-06-21 18:14:18,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:18,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:18,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:14:18,106 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:18,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:18,106 INFO L85 PathProgramCache]: Analyzing trace with hash 69709080, now seen corresponding path program 5 times [2024-06-21 18:14:18,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:18,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432190937] [2024-06-21 18:14:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:18,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:18,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:18,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432190937] [2024-06-21 18:14:18,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432190937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:18,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:18,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:14:18,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033406718] [2024-06-21 18:14:18,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:18,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:18,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:18,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:18,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:18,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 57 transitions, 360 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:18,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:18,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:18,268 INFO L124 PetriNetUnfolderBase]: 305/711 cut-off events. [2024-06-21 18:14:18,268 INFO L125 PetriNetUnfolderBase]: For 1921/1921 co-relation queries the response was YES. [2024-06-21 18:14:18,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 711 events. 305/711 cut-off events. For 1921/1921 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4549 event pairs, 63 based on Foata normal form. 4/693 useless extension candidates. Maximal degree in co-relation 1974. Up to 301 conditions per place. [2024-06-21 18:14:18,272 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 39 selfloop transitions, 19 changer transitions 0/72 dead transitions. [2024-06-21 18:14:18,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 72 transitions, 512 flow [2024-06-21 18:14:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-21 18:14:18,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-06-21 18:14:18,273 INFO L175 Difference]: Start difference. First operand has 79 places, 57 transitions, 360 flow. Second operand 6 states and 166 transitions. [2024-06-21 18:14:18,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 72 transitions, 512 flow [2024-06-21 18:14:18,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 72 transitions, 489 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:18,277 INFO L231 Difference]: Finished difference. Result has 82 places, 58 transitions, 385 flow [2024-06-21 18:14:18,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=82, PETRI_TRANSITIONS=58} [2024-06-21 18:14:18,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 18:14:18,278 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 58 transitions, 385 flow [2024-06-21 18:14:18,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:18,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:18,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:14:18,278 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:18,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:18,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1713955065, now seen corresponding path program 1 times [2024-06-21 18:14:18,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:18,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269231803] [2024-06-21 18:14:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:18,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:18,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:18,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269231803] [2024-06-21 18:14:18,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269231803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:18,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:18,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:18,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446208557] [2024-06-21 18:14:18,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:18,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:18,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:18,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:18,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:18,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 58 transitions, 385 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:18,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:18,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:18,485 INFO L124 PetriNetUnfolderBase]: 321/776 cut-off events. [2024-06-21 18:14:18,485 INFO L125 PetriNetUnfolderBase]: For 2312/2312 co-relation queries the response was YES. [2024-06-21 18:14:18,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2141 conditions, 776 events. 321/776 cut-off events. For 2312/2312 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5123 event pairs, 66 based on Foata normal form. 8/758 useless extension candidates. Maximal degree in co-relation 2109. Up to 355 conditions per place. [2024-06-21 18:14:18,490 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 48 selfloop transitions, 12 changer transitions 4/78 dead transitions. [2024-06-21 18:14:18,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 559 flow [2024-06-21 18:14:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 18:14:18,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865079365079365 [2024-06-21 18:14:18,491 INFO L175 Difference]: Start difference. First operand has 82 places, 58 transitions, 385 flow. Second operand 6 states and 173 transitions. [2024-06-21 18:14:18,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 559 flow [2024-06-21 18:14:18,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 78 transitions, 532 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:18,495 INFO L231 Difference]: Finished difference. Result has 85 places, 56 transitions, 370 flow [2024-06-21 18:14:18,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=85, PETRI_TRANSITIONS=56} [2024-06-21 18:14:18,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-21 18:14:18,496 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 56 transitions, 370 flow [2024-06-21 18:14:18,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:18,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:18,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:14:18,497 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:18,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash 792068217, now seen corresponding path program 2 times [2024-06-21 18:14:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:18,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945177508] [2024-06-21 18:14:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:18,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:18,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:18,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945177508] [2024-06-21 18:14:18,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945177508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:18,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:18,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:18,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529621549] [2024-06-21 18:14:18,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:18,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:18,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:18,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:18,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:18,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:18,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 56 transitions, 370 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:18,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:18,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:18,679 INFO L124 PetriNetUnfolderBase]: 315/741 cut-off events. [2024-06-21 18:14:18,679 INFO L125 PetriNetUnfolderBase]: For 3176/3176 co-relation queries the response was YES. [2024-06-21 18:14:18,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132 conditions, 741 events. 315/741 cut-off events. For 3176/3176 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4762 event pairs, 92 based on Foata normal form. 8/723 useless extension candidates. Maximal degree in co-relation 2098. Up to 231 conditions per place. [2024-06-21 18:14:18,683 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 45 selfloop transitions, 14 changer transitions 5/78 dead transitions. [2024-06-21 18:14:18,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 78 transitions, 572 flow [2024-06-21 18:14:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 18:14:18,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865079365079365 [2024-06-21 18:14:18,684 INFO L175 Difference]: Start difference. First operand has 85 places, 56 transitions, 370 flow. Second operand 6 states and 173 transitions. [2024-06-21 18:14:18,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 78 transitions, 572 flow [2024-06-21 18:14:18,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 524 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:18,689 INFO L231 Difference]: Finished difference. Result has 83 places, 53 transitions, 331 flow [2024-06-21 18:14:18,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=83, PETRI_TRANSITIONS=53} [2024-06-21 18:14:18,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-21 18:14:18,690 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 53 transitions, 331 flow [2024-06-21 18:14:18,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:18,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:18,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:14:18,691 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:18,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1971208023, now seen corresponding path program 3 times [2024-06-21 18:14:18,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:18,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520127603] [2024-06-21 18:14:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:18,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:18,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520127603] [2024-06-21 18:14:18,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520127603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:18,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:18,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:18,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147353564] [2024-06-21 18:14:18,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:18,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:18,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:18,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:18,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:18,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:18,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 53 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:18,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:18,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:18,859 INFO L124 PetriNetUnfolderBase]: 258/627 cut-off events. [2024-06-21 18:14:18,860 INFO L125 PetriNetUnfolderBase]: For 2196/2196 co-relation queries the response was YES. [2024-06-21 18:14:18,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 627 events. 258/627 cut-off events. For 2196/2196 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3911 event pairs, 60 based on Foata normal form. 8/619 useless extension candidates. Maximal degree in co-relation 1677. Up to 231 conditions per place. [2024-06-21 18:14:18,863 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 39 selfloop transitions, 14 changer transitions 9/76 dead transitions. [2024-06-21 18:14:18,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 76 transitions, 505 flow [2024-06-21 18:14:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 18:14:18,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-06-21 18:14:18,864 INFO L175 Difference]: Start difference. First operand has 83 places, 53 transitions, 331 flow. Second operand 8 states and 220 transitions. [2024-06-21 18:14:18,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 76 transitions, 505 flow [2024-06-21 18:14:18,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 76 transitions, 461 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:18,868 INFO L231 Difference]: Finished difference. Result has 82 places, 48 transitions, 281 flow [2024-06-21 18:14:18,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=281, PETRI_PLACES=82, PETRI_TRANSITIONS=48} [2024-06-21 18:14:18,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 18:14:18,869 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 48 transitions, 281 flow [2024-06-21 18:14:18,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:18,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:18,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:14:18,869 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:18,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1522715305, now seen corresponding path program 4 times [2024-06-21 18:14:18,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:18,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170882763] [2024-06-21 18:14:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:18,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:18,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170882763] [2024-06-21 18:14:18,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170882763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:18,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:18,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:18,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159054548] [2024-06-21 18:14:18,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:18,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:18,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:18,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:18,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 48 transitions, 281 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:18,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:18,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:19,053 INFO L124 PetriNetUnfolderBase]: 236/583 cut-off events. [2024-06-21 18:14:19,053 INFO L125 PetriNetUnfolderBase]: For 1960/1960 co-relation queries the response was YES. [2024-06-21 18:14:19,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1521 conditions, 583 events. 236/583 cut-off events. For 1960/1960 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3538 event pairs, 39 based on Foata normal form. 8/576 useless extension candidates. Maximal degree in co-relation 1489. Up to 225 conditions per place. [2024-06-21 18:14:19,055 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 36 selfloop transitions, 9 changer transitions 12/71 dead transitions. [2024-06-21 18:14:19,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 71 transitions, 451 flow [2024-06-21 18:14:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 18:14:19,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-21 18:14:19,057 INFO L175 Difference]: Start difference. First operand has 82 places, 48 transitions, 281 flow. Second operand 7 states and 194 transitions. [2024-06-21 18:14:19,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 71 transitions, 451 flow [2024-06-21 18:14:19,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 392 flow, removed 1 selfloop flow, removed 15 redundant places. [2024-06-21 18:14:19,060 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 236 flow [2024-06-21 18:14:19,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2024-06-21 18:14:19,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-21 18:14:19,060 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 236 flow [2024-06-21 18:14:19,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:19,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:19,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:14:19,061 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:19,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash 568769017, now seen corresponding path program 5 times [2024-06-21 18:14:19,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:19,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122844103] [2024-06-21 18:14:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:19,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:19,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:19,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122844103] [2024-06-21 18:14:19,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122844103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:19,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:19,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407682899] [2024-06-21 18:14:19,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:19,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:19,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:19,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:19,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 236 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:19,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:19,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:19,200 INFO L124 PetriNetUnfolderBase]: 230/576 cut-off events. [2024-06-21 18:14:19,200 INFO L125 PetriNetUnfolderBase]: For 2428/2428 co-relation queries the response was YES. [2024-06-21 18:14:19,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1491 conditions, 576 events. 230/576 cut-off events. For 2428/2428 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3543 event pairs, 22 based on Foata normal form. 8/569 useless extension candidates. Maximal degree in co-relation 1464. Up to 188 conditions per place. [2024-06-21 18:14:19,203 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 37 selfloop transitions, 9 changer transitions 7/67 dead transitions. [2024-06-21 18:14:19,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 412 flow [2024-06-21 18:14:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:19,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-21 18:14:19,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 18:14:19,204 INFO L175 Difference]: Start difference. First operand has 74 places, 47 transitions, 236 flow. Second operand 6 states and 168 transitions. [2024-06-21 18:14:19,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 412 flow [2024-06-21 18:14:19,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 390 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:19,207 INFO L231 Difference]: Finished difference. Result has 73 places, 44 transitions, 214 flow [2024-06-21 18:14:19,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=44} [2024-06-21 18:14:19,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 18:14:19,208 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 44 transitions, 214 flow [2024-06-21 18:14:19,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:19,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:19,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:14:19,208 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:19,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:19,209 INFO L85 PathProgramCache]: Analyzing trace with hash 346932021, now seen corresponding path program 6 times [2024-06-21 18:14:19,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:19,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023522576] [2024-06-21 18:14:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:19,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:19,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:19,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023522576] [2024-06-21 18:14:19,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023522576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:19,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:19,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143452844] [2024-06-21 18:14:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:19,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:19,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:19,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:19,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 44 transitions, 214 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:19,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:19,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:19,382 INFO L124 PetriNetUnfolderBase]: 206/523 cut-off events. [2024-06-21 18:14:19,382 INFO L125 PetriNetUnfolderBase]: For 2369/2369 co-relation queries the response was YES. [2024-06-21 18:14:19,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 523 events. 206/523 cut-off events. For 2369/2369 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3194 event pairs, 50 based on Foata normal form. 8/518 useless extension candidates. Maximal degree in co-relation 1349. Up to 169 conditions per place. [2024-06-21 18:14:19,385 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 39 selfloop transitions, 7 changer transitions 12/72 dead transitions. [2024-06-21 18:14:19,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 418 flow [2024-06-21 18:14:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-21 18:14:19,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402116402116402 [2024-06-21 18:14:19,386 INFO L175 Difference]: Start difference. First operand has 73 places, 44 transitions, 214 flow. Second operand 9 states and 242 transitions. [2024-06-21 18:14:19,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 418 flow [2024-06-21 18:14:19,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 373 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:19,389 INFO L231 Difference]: Finished difference. Result has 71 places, 42 transitions, 178 flow [2024-06-21 18:14:19,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=178, PETRI_PLACES=71, PETRI_TRANSITIONS=42} [2024-06-21 18:14:19,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 18:14:19,389 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 42 transitions, 178 flow [2024-06-21 18:14:19,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:19,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:19,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:14:19,390 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:19,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash 752426199, now seen corresponding path program 7 times [2024-06-21 18:14:19,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:19,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528056102] [2024-06-21 18:14:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:19,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:19,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:19,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528056102] [2024-06-21 18:14:19,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528056102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:19,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:19,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:19,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067726140] [2024-06-21 18:14:19,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:19,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:19,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:19,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:19,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:19,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:19,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 42 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:19,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:19,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:19,565 INFO L124 PetriNetUnfolderBase]: 144/373 cut-off events. [2024-06-21 18:14:19,566 INFO L125 PetriNetUnfolderBase]: For 1293/1293 co-relation queries the response was YES. [2024-06-21 18:14:19,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 373 events. 144/373 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2020 event pairs, 46 based on Foata normal form. 8/368 useless extension candidates. Maximal degree in co-relation 871. Up to 169 conditions per place. [2024-06-21 18:14:19,567 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 26 selfloop transitions, 4 changer transitions 15/59 dead transitions. [2024-06-21 18:14:19,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 59 transitions, 306 flow [2024-06-21 18:14:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 18:14:19,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-21 18:14:19,569 INFO L175 Difference]: Start difference. First operand has 71 places, 42 transitions, 178 flow. Second operand 7 states and 187 transitions. [2024-06-21 18:14:19,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 59 transitions, 306 flow [2024-06-21 18:14:19,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 59 transitions, 289 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:19,571 INFO L231 Difference]: Finished difference. Result has 67 places, 39 transitions, 156 flow [2024-06-21 18:14:19,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=67, PETRI_TRANSITIONS=39} [2024-06-21 18:14:19,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-21 18:14:19,571 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 39 transitions, 156 flow [2024-06-21 18:14:19,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:19,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:19,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:14:19,572 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:19,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash 497862745, now seen corresponding path program 8 times [2024-06-21 18:14:19,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:19,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214847544] [2024-06-21 18:14:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:19,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:19,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:19,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214847544] [2024-06-21 18:14:19,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214847544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:19,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:19,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806354206] [2024-06-21 18:14:19,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:19,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:19,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:19,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:19,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:19,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 39 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:19,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:19,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:19,688 INFO L124 PetriNetUnfolderBase]: 148/370 cut-off events. [2024-06-21 18:14:19,689 INFO L125 PetriNetUnfolderBase]: For 1559/1559 co-relation queries the response was YES. [2024-06-21 18:14:19,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 370 events. 148/370 cut-off events. For 1559/1559 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2120 event pairs, 46 based on Foata normal form. 8/361 useless extension candidates. Maximal degree in co-relation 916. Up to 117 conditions per place. [2024-06-21 18:14:19,690 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 32 selfloop transitions, 4 changer transitions 6/56 dead transitions. [2024-06-21 18:14:19,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 56 transitions, 298 flow [2024-06-21 18:14:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 18:14:19,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-06-21 18:14:19,692 INFO L175 Difference]: Start difference. First operand has 67 places, 39 transitions, 156 flow. Second operand 6 states and 165 transitions. [2024-06-21 18:14:19,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 56 transitions, 298 flow [2024-06-21 18:14:19,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 282 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:19,694 INFO L231 Difference]: Finished difference. Result has 62 places, 37 transitions, 144 flow [2024-06-21 18:14:19,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=62, PETRI_TRANSITIONS=37} [2024-06-21 18:14:19,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 18:14:19,694 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 37 transitions, 144 flow [2024-06-21 18:14:19,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:19,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:19,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:14:19,695 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:19,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:19,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704181, now seen corresponding path program 9 times [2024-06-21 18:14:19,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:19,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145156856] [2024-06-21 18:14:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:19,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:19,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:19,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145156856] [2024-06-21 18:14:19,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145156856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:19,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:19,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:19,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651595774] [2024-06-21 18:14:19,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:19,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:19,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:19,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:19,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 37 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:19,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:19,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:19,812 INFO L124 PetriNetUnfolderBase]: 104/270 cut-off events. [2024-06-21 18:14:19,813 INFO L125 PetriNetUnfolderBase]: For 911/911 co-relation queries the response was YES. [2024-06-21 18:14:19,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 270 events. 104/270 cut-off events. For 911/911 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1344 event pairs, 20 based on Foata normal form. 8/267 useless extension candidates. Maximal degree in co-relation 638. Up to 117 conditions per place. [2024-06-21 18:14:19,814 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 20 selfloop transitions, 1 changer transitions 16/51 dead transitions. [2024-06-21 18:14:19,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 51 transitions, 248 flow [2024-06-21 18:14:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 18:14:19,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-21 18:14:19,815 INFO L175 Difference]: Start difference. First operand has 62 places, 37 transitions, 144 flow. Second operand 6 states and 161 transitions. [2024-06-21 18:14:19,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 51 transitions, 248 flow [2024-06-21 18:14:19,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 237 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:19,817 INFO L231 Difference]: Finished difference. Result has 61 places, 33 transitions, 114 flow [2024-06-21 18:14:19,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=61, PETRI_TRANSITIONS=33} [2024-06-21 18:14:19,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 18:14:19,817 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 33 transitions, 114 flow [2024-06-21 18:14:19,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:19,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:19,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:14:19,818 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:19,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:19,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1729031401, now seen corresponding path program 10 times [2024-06-21 18:14:19,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:19,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264634122] [2024-06-21 18:14:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:19,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:19,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:19,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264634122] [2024-06-21 18:14:19,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264634122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:19,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:19,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:19,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996693866] [2024-06-21 18:14:19,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:19,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:19,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:19,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:19,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:19,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:19,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 33 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:19,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:19,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:19,921 INFO L124 PetriNetUnfolderBase]: 82/219 cut-off events. [2024-06-21 18:14:19,922 INFO L125 PetriNetUnfolderBase]: For 696/696 co-relation queries the response was YES. [2024-06-21 18:14:19,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 219 events. 82/219 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1059 event pairs, 4 based on Foata normal form. 8/223 useless extension candidates. Maximal degree in co-relation 493. Up to 76 conditions per place. [2024-06-21 18:14:19,923 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 20 selfloop transitions, 3 changer transitions 6/43 dead transitions. [2024-06-21 18:14:19,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 43 transitions, 192 flow [2024-06-21 18:14:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 18:14:19,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-21 18:14:19,924 INFO L175 Difference]: Start difference. First operand has 61 places, 33 transitions, 114 flow. Second operand 6 states and 155 transitions. [2024-06-21 18:14:19,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 43 transitions, 192 flow [2024-06-21 18:14:19,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 43 transitions, 181 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:19,925 INFO L231 Difference]: Finished difference. Result has 54 places, 31 transitions, 101 flow [2024-06-21 18:14:19,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=54, PETRI_TRANSITIONS=31} [2024-06-21 18:14:19,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-21 18:14:19,926 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 31 transitions, 101 flow [2024-06-21 18:14:19,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:19,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:19,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:14:19,926 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:19,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash 718196355, now seen corresponding path program 11 times [2024-06-21 18:14:19,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:19,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450872574] [2024-06-21 18:14:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:19,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:19,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:19,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450872574] [2024-06-21 18:14:19,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450872574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:19,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:19,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610776476] [2024-06-21 18:14:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:19,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:14:19,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:14:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:14:19,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-06-21 18:14:19,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 31 transitions, 101 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:19,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-06-21 18:14:19,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:20,020 INFO L124 PetriNetUnfolderBase]: 38/119 cut-off events. [2024-06-21 18:14:20,021 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2024-06-21 18:14:20,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 119 events. 38/119 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 394 event pairs, 0 based on Foata normal form. 8/127 useless extension candidates. Maximal degree in co-relation 250. Up to 40 conditions per place. [2024-06-21 18:14:20,021 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2024-06-21 18:14:20,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 38 transitions, 151 flow [2024-06-21 18:14:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 18:14:20,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-21 18:14:20,023 INFO L175 Difference]: Start difference. First operand has 54 places, 31 transitions, 101 flow. Second operand 6 states and 151 transitions. [2024-06-21 18:14:20,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 38 transitions, 151 flow [2024-06-21 18:14:20,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:20,023 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2024-06-21 18:14:20,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2024-06-21 18:14:20,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-21 18:14:20,024 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2024-06-21 18:14:20,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:20,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 18:14:20,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 18:14:20,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 18:14:20,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 18:14:20,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 18:14:20,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 18:14:20,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:14:20,028 INFO L445 BasicCegarLoop]: Path program histogram: [11, 5, 3, 2, 2, 1, 1, 1] [2024-06-21 18:14:20,030 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 18:14:20,030 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 18:14:20,033 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 18:14:20,033 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 18:14:20,034 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 06:14:20 BasicIcfg [2024-06-21 18:14:20,034 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 18:14:20,035 INFO L158 Benchmark]: Toolchain (without parser) took 6222.77ms. Allocated memory was 169.9MB in the beginning and 260.0MB in the end (delta: 90.2MB). Free memory was 107.9MB in the beginning and 80.3MB in the end (delta: 27.6MB). Peak memory consumption was 117.7MB. Max. memory is 16.1GB. [2024-06-21 18:14:20,035 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory was 60.1MB in the beginning and 59.9MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:14:20,035 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 169.9MB. Free memory is still 110.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:14:20,035 INFO L158 Benchmark]: CACSL2BoogieTranslator took 498.06ms. Allocated memory is still 169.9MB. Free memory was 107.9MB in the beginning and 82.6MB in the end (delta: 25.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 18:14:20,035 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.32ms. Allocated memory is still 169.9MB. Free memory was 82.6MB in the beginning and 80.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:14:20,035 INFO L158 Benchmark]: Boogie Preprocessor took 40.36ms. Allocated memory is still 169.9MB. Free memory was 80.6MB in the beginning and 78.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:14:20,036 INFO L158 Benchmark]: RCFGBuilder took 512.99ms. Allocated memory is still 169.9MB. Free memory was 78.5MB in the beginning and 131.8MB in the end (delta: -53.2MB). Peak memory consumption was 25.3MB. Max. memory is 16.1GB. [2024-06-21 18:14:20,036 INFO L158 Benchmark]: TraceAbstraction took 5127.68ms. Allocated memory was 169.9MB in the beginning and 260.0MB in the end (delta: 90.2MB). Free memory was 131.8MB in the beginning and 80.3MB in the end (delta: 51.5MB). Peak memory consumption was 140.6MB. Max. memory is 16.1GB. [2024-06-21 18:14:20,037 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory was 60.1MB in the beginning and 59.9MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 169.9MB. Free memory is still 110.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 498.06ms. Allocated memory is still 169.9MB. Free memory was 107.9MB in the beginning and 82.6MB in the end (delta: 25.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.32ms. Allocated memory is still 169.9MB. Free memory was 82.6MB in the beginning and 80.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.36ms. Allocated memory is still 169.9MB. Free memory was 80.6MB in the beginning and 78.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 512.99ms. Allocated memory is still 169.9MB. Free memory was 78.5MB in the beginning and 131.8MB in the end (delta: -53.2MB). Peak memory consumption was 25.3MB. Max. memory is 16.1GB. * TraceAbstraction took 5127.68ms. Allocated memory was 169.9MB in the beginning and 260.0MB in the end (delta: 90.2MB). Free memory was 131.8MB in the beginning and 80.3MB in the end (delta: 51.5MB). Peak memory consumption was 140.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 785]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 787]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 788]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 69 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.0s, OverallIterations: 26, TraceHistogramMax: 1, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1124 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 886 mSDsluCounter, 195 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 106 mSDsCounter, 109 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2748 IncrementalHoareTripleChecker+Invalid, 2857 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 109 mSolverCounterUnsat, 89 mSDtfsCounter, 2748 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=385occurred in iteration=15, InterpolantAutomatonStates: 151, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 463 NumberOfCodeBlocks, 463 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 437 ConstructedInterpolants, 0 QuantifiedInterpolants, 2676 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 18:14:20,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE