./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/szymanski.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/szymanski.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-atomic/szymanski.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/szymanski.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:51:58,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:51:58,991 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:51:58,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:51:58,999 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:51:59,031 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:51:59,032 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:51:59,032 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:51:59,033 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:51:59,037 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:51:59,037 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:51:59,038 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:51:59,039 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:51:59,040 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:51:59,040 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:51:59,040 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:51:59,040 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:51:59,041 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:51:59,041 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:51:59,041 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:51:59,041 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:51:59,042 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:51:59,042 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:51:59,042 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:51:59,042 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:51:59,042 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:51:59,043 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:51:59,043 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:51:59,043 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:51:59,043 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:51:59,044 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:51:59,044 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:51:59,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:51:59,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:51:59,045 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:51:59,045 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:51:59,045 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:51:59,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:51:59,046 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:51:59,046 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:51:59,046 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:51:59,046 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:51:59,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:51:59,046 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:51:59,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:51:59,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:51:59,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:51:59,251 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:51:59,252 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:51:59,253 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/szymanski.i [2024-06-28 00:52:00,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:52:00,483 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:52:00,483 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i [2024-06-28 00:52:00,494 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35693c794/2e6a48bf96554aa9bb1bca3edcae4b59/FLAG224d89fa4 [2024-06-28 00:52:00,504 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35693c794/2e6a48bf96554aa9bb1bca3edcae4b59 [2024-06-28 00:52:00,506 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:52:00,507 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:52:00,507 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/szymanski.yml/witness.yml [2024-06-28 00:52:00,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:52:00,581 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:52:00,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:52:00,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:52:00,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:52:00,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:52:00" (1/2) ... [2024-06-28 00:52:00,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe3d8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:00, skipping insertion in model container [2024-06-28 00:52:00,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:52:00" (1/2) ... [2024-06-28 00:52:00,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@79c2821f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:00, skipping insertion in model container [2024-06-28 00:52:00,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:00" (2/2) ... [2024-06-28 00:52:00,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe3d8f7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:00, skipping insertion in model container [2024-06-28 00:52:00,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:00" (2/2) ... [2024-06-28 00:52:00,592 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:52:00,623 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:52:00,624 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] (((! multithreaded || (((((flag1 == 0 || flag1 == 1) || flag1 == 2) || flag1 == 3) || flag1 == 4) && ((((flag2 == 0 || flag2 == 1) || flag2 == 2) || flag2 == 3) || flag2 == 4))) && (! multithreaded || ((((flag1 == 0 || flag1 == 1) || flag1 == 2) || flag1 == 3) || flag1 == 4))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((flag2 == 0 || flag2 == 1) || flag2 == 2) || flag2 == 3) || flag2 == 4)) [2024-06-28 00:52:00,624 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] (((! multithreaded || (((((flag1 == 0 || flag1 == 1) || flag1 == 2) || flag1 == 3) || flag1 == 4) && ((((flag2 == 0 || flag2 == 1) || flag2 == 2) || flag2 == 3) || flag2 == 4))) && (! multithreaded || ((((flag1 == 0 || flag1 == 1) || flag1 == 2) || flag1 == 3) || flag1 == 4))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((flag2 == 0 || flag2 == 1) || flag2 == 2) || flag2 == 3) || flag2 == 4)) [2024-06-28 00:52:00,624 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:52:00,624 INFO L106 edCorrectnessWitness]: ghost_update [L818-L818] multithreaded = 1; [2024-06-28 00:52:00,659 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:52:00,888 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[31505,31518] [2024-06-28 00:52:00,895 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[32915,32928] [2024-06-28 00:52:00,899 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:52:00,911 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 00:52:00,965 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[31505,31518] [2024-06-28 00:52:00,967 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[32915,32928] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:52:00,983 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:52:01,010 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:52:01,011 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01 WrapperNode [2024-06-28 00:52:01,011 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:52:01,012 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:52:01,012 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:52:01,012 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:52:01,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,058 INFO L138 Inliner]: procedures = 169, calls = 64, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2024-06-28 00:52:01,059 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:52:01,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:52:01,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:52:01,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:52:01,069 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,071 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,092 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 00:52:01,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,097 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,102 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,104 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:52:01,105 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:52:01,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:52:01,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:52:01,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (1/1) ... [2024-06-28 00:52:01,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:52:01,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:52:01,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 00:52:01,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:52:01,159 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-06-28 00:52:01,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-06-28 00:52:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-28 00:52:01,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-28 00:52:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:52:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:52:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:52:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:52:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:52:01,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:52:01,162 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:52:01,257 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:52:01,258 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:52:01,401 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:52:01,402 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:52:01,462 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:52:01,463 INFO L320 CfgBuilder]: Removed 8 assume(true) statements. [2024-06-28 00:52:01,463 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:52:01 BoogieIcfgContainer [2024-06-28 00:52:01,463 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:52:01,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:52:01,465 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:52:01,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:52:01,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:52:00" (1/4) ... [2024-06-28 00:52:01,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e23eb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:52:01, skipping insertion in model container [2024-06-28 00:52:01,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:00" (2/4) ... [2024-06-28 00:52:01,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e23eb25 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:52:01, skipping insertion in model container [2024-06-28 00:52:01,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:01" (3/4) ... [2024-06-28 00:52:01,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e23eb25 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:52:01, skipping insertion in model container [2024-06-28 00:52:01,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:52:01" (4/4) ... [2024-06-28 00:52:01,470 INFO L112 eAbstractionObserver]: Analyzing ICFG szymanski.i [2024-06-28 00:52:01,484 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:52:01,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:52:01,484 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:52:01,519 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-28 00:52:01,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 75 transitions, 164 flow [2024-06-28 00:52:01,571 INFO L124 PetriNetUnfolderBase]: 12/73 cut-off events. [2024-06-28 00:52:01,572 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-28 00:52:01,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 12/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-06-28 00:52:01,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 75 transitions, 164 flow [2024-06-28 00:52:01,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 71 transitions, 151 flow [2024-06-28 00:52:01,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:52:01,592 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;@31b8992, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:52:01,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 00:52:01,598 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:52:01,598 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:52:01,598 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:52:01,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:01,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:52:01,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:01,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:01,605 INFO L85 PathProgramCache]: Analyzing trace with hash 279476103, now seen corresponding path program 1 times [2024-06-28 00:52:01,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:01,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241018137] [2024-06-28 00:52:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:01,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:01,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:01,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241018137] [2024-06-28 00:52:01,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241018137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:01,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:01,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:52:01,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834247430] [2024-06-28 00:52:01,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:01,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:52:01,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:52:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:52:02,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 75 [2024-06-28 00:52:02,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:02,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:02,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 75 [2024-06-28 00:52:02,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:02,251 INFO L124 PetriNetUnfolderBase]: 729/1596 cut-off events. [2024-06-28 00:52:02,252 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-06-28 00:52:02,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 1596 events. 729/1596 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9935 event pairs, 366 based on Foata normal form. 69/1591 useless extension candidates. Maximal degree in co-relation 2554. Up to 980 conditions per place. [2024-06-28 00:52:02,267 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 32 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2024-06-28 00:52:02,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 232 flow [2024-06-28 00:52:02,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:52:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:52:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-06-28 00:52:02,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-06-28 00:52:02,320 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 151 flow. Second operand 3 states and 165 transitions. [2024-06-28 00:52:02,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 232 flow [2024-06-28 00:52:02,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:02,329 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 163 flow [2024-06-28 00:52:02,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2024-06-28 00:52:02,350 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-06-28 00:52:02,356 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 163 flow [2024-06-28 00:52:02,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:02,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:02,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:02,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:52:02,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:02,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2003428164, now seen corresponding path program 1 times [2024-06-28 00:52:02,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:02,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381335293] [2024-06-28 00:52:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:02,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:02,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:02,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381335293] [2024-06-28 00:52:02,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381335293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:02,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:02,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:52:02,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891117587] [2024-06-28 00:52:02,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:02,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:02,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:02,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:02,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:02,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-28 00:52:02,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:02,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:02,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-28 00:52:02,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:02,680 INFO L124 PetriNetUnfolderBase]: 775/1698 cut-off events. [2024-06-28 00:52:02,680 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-06-28 00:52:02,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 1698 events. 775/1698 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10770 event pairs, 167 based on Foata normal form. 11/1654 useless extension candidates. Maximal degree in co-relation 2224. Up to 919 conditions per place. [2024-06-28 00:52:02,692 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 43 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2024-06-28 00:52:02,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 302 flow [2024-06-28 00:52:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-06-28 00:52:02,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-06-28 00:52:02,699 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 163 flow. Second operand 4 states and 215 transitions. [2024-06-28 00:52:02,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 302 flow [2024-06-28 00:52:02,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:02,702 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 194 flow [2024-06-28 00:52:02,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-28 00:52:02,703 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 4 predicate places. [2024-06-28 00:52:02,717 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 194 flow [2024-06-28 00:52:02,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:02,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:02,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:02,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:52:02,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:02,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:02,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1660336074, now seen corresponding path program 1 times [2024-06-28 00:52:02,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:02,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576030010] [2024-06-28 00:52:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:02,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:02,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:02,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576030010] [2024-06-28 00:52:02,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576030010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:02,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:02,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:52:02,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666823475] [2024-06-28 00:52:02,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:02,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:02,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:02,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:02,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:02,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-28 00:52:02,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:02,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:02,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-28 00:52:02,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:03,019 INFO L124 PetriNetUnfolderBase]: 779/1727 cut-off events. [2024-06-28 00:52:03,019 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2024-06-28 00:52:03,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3245 conditions, 1727 events. 779/1727 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10906 event pairs, 168 based on Foata normal form. 2/1678 useless extension candidates. Maximal degree in co-relation 2484. Up to 918 conditions per place. [2024-06-28 00:52:03,031 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 43 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-06-28 00:52:03,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 342 flow [2024-06-28 00:52:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-06-28 00:52:03,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-06-28 00:52:03,034 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 194 flow. Second operand 4 states and 215 transitions. [2024-06-28 00:52:03,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 342 flow [2024-06-28 00:52:03,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 335 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:03,038 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 226 flow [2024-06-28 00:52:03,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-28 00:52:03,040 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2024-06-28 00:52:03,040 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 226 flow [2024-06-28 00:52:03,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:03,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:03,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:03,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:52:03,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:03,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash 639549999, now seen corresponding path program 1 times [2024-06-28 00:52:03,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:03,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084757456] [2024-06-28 00:52:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:03,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:03,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:03,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084757456] [2024-06-28 00:52:03,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084757456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:03,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:03,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:52:03,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003169507] [2024-06-28 00:52:03,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:03,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:03,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:03,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:03,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:03,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-28 00:52:03,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:03,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:03,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-28 00:52:03,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:03,344 INFO L124 PetriNetUnfolderBase]: 771/1641 cut-off events. [2024-06-28 00:52:03,344 INFO L125 PetriNetUnfolderBase]: For 1040/1048 co-relation queries the response was YES. [2024-06-28 00:52:03,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3401 conditions, 1641 events. 771/1641 cut-off events. For 1040/1048 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10210 event pairs, 303 based on Foata normal form. 2/1588 useless extension candidates. Maximal degree in co-relation 3120. Up to 1016 conditions per place. [2024-06-28 00:52:03,352 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 44 selfloop transitions, 7 changer transitions 0/90 dead transitions. [2024-06-28 00:52:03,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 368 flow [2024-06-28 00:52:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 210 transitions. [2024-06-28 00:52:03,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-28 00:52:03,354 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 226 flow. Second operand 4 states and 210 transitions. [2024-06-28 00:52:03,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 368 flow [2024-06-28 00:52:03,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 361 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:03,358 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 262 flow [2024-06-28 00:52:03,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-28 00:52:03,359 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 11 predicate places. [2024-06-28 00:52:03,360 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 262 flow [2024-06-28 00:52:03,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:03,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:03,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:03,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:52:03,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:03,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:03,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1970755372, now seen corresponding path program 1 times [2024-06-28 00:52:03,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:03,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562863870] [2024-06-28 00:52:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:03,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:03,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:03,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562863870] [2024-06-28 00:52:03,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562863870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:03,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:03,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:03,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136109242] [2024-06-28 00:52:03,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:03,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:03,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:03,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:03,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:03,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:03,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:03,678 INFO L124 PetriNetUnfolderBase]: 872/1823 cut-off events. [2024-06-28 00:52:03,679 INFO L125 PetriNetUnfolderBase]: For 1877/1877 co-relation queries the response was YES. [2024-06-28 00:52:03,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 1823 events. 872/1823 cut-off events. For 1877/1877 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11338 event pairs, 284 based on Foata normal form. 47/1811 useless extension candidates. Maximal degree in co-relation 3082. Up to 667 conditions per place. [2024-06-28 00:52:03,690 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 60 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-28 00:52:03,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 503 flow [2024-06-28 00:52:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-06-28 00:52:03,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.712 [2024-06-28 00:52:03,692 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 262 flow. Second operand 5 states and 267 transitions. [2024-06-28 00:52:03,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 503 flow [2024-06-28 00:52:03,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 501 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:03,701 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 334 flow [2024-06-28 00:52:03,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-06-28 00:52:03,704 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 18 predicate places. [2024-06-28 00:52:03,705 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 334 flow [2024-06-28 00:52:03,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:03,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:03,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:03,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:52:03,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:03,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1943973232, now seen corresponding path program 2 times [2024-06-28 00:52:03,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:03,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305096726] [2024-06-28 00:52:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:03,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:03,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:03,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305096726] [2024-06-28 00:52:03,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305096726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:03,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:03,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:03,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166812604] [2024-06-28 00:52:03,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:03,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:03,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:03,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:03,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:03,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:03,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:03,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:03,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:03,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:04,011 INFO L124 PetriNetUnfolderBase]: 891/1871 cut-off events. [2024-06-28 00:52:04,012 INFO L125 PetriNetUnfolderBase]: For 3047/3055 co-relation queries the response was YES. [2024-06-28 00:52:04,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4600 conditions, 1871 events. 891/1871 cut-off events. For 3047/3055 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11491 event pairs, 235 based on Foata normal form. 12/1827 useless extension candidates. Maximal degree in co-relation 4082. Up to 610 conditions per place. [2024-06-28 00:52:04,024 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 61 selfloop transitions, 15 changer transitions 0/114 dead transitions. [2024-06-28 00:52:04,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 114 transitions, 585 flow [2024-06-28 00:52:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-06-28 00:52:04,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7093333333333334 [2024-06-28 00:52:04,026 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 334 flow. Second operand 5 states and 266 transitions. [2024-06-28 00:52:04,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 114 transitions, 585 flow [2024-06-28 00:52:04,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 114 transitions, 571 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:04,034 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 370 flow [2024-06-28 00:52:04,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=370, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-06-28 00:52:04,037 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 22 predicate places. [2024-06-28 00:52:04,037 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 370 flow [2024-06-28 00:52:04,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:04,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:04,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:04,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:52:04,041 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:04,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:04,041 INFO L85 PathProgramCache]: Analyzing trace with hash -733680217, now seen corresponding path program 1 times [2024-06-28 00:52:04,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:04,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80679388] [2024-06-28 00:52:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:04,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:04,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:04,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80679388] [2024-06-28 00:52:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80679388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:04,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521587492] [2024-06-28 00:52:04,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:04,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:04,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 75 [2024-06-28 00:52:04,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:04,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:04,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 75 [2024-06-28 00:52:04,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:04,349 INFO L124 PetriNetUnfolderBase]: 1330/3041 cut-off events. [2024-06-28 00:52:04,349 INFO L125 PetriNetUnfolderBase]: For 2604/2640 co-relation queries the response was YES. [2024-06-28 00:52:04,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6321 conditions, 3041 events. 1330/3041 cut-off events. For 2604/2640 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 22146 event pairs, 300 based on Foata normal form. 61/2910 useless extension candidates. Maximal degree in co-relation 6135. Up to 1033 conditions per place. [2024-06-28 00:52:04,368 INFO L140 encePairwiseOnDemand]: 58/75 looper letters, 79 selfloop transitions, 20 changer transitions 1/142 dead transitions. [2024-06-28 00:52:04,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 142 transitions, 736 flow [2024-06-28 00:52:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 276 transitions. [2024-06-28 00:52:04,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.736 [2024-06-28 00:52:04,370 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 370 flow. Second operand 5 states and 276 transitions. [2024-06-28 00:52:04,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 142 transitions, 736 flow [2024-06-28 00:52:04,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 142 transitions, 699 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:04,376 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 491 flow [2024-06-28 00:52:04,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=491, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2024-06-28 00:52:04,377 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 27 predicate places. [2024-06-28 00:52:04,377 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 491 flow [2024-06-28 00:52:04,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:04,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:04,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:04,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:52:04,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:04,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:04,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1376536195, now seen corresponding path program 1 times [2024-06-28 00:52:04,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:04,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625689742] [2024-06-28 00:52:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:04,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:04,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:04,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625689742] [2024-06-28 00:52:04,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625689742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:04,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:04,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:52:04,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046593581] [2024-06-28 00:52:04,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:04,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:04,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:04,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:04,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-28 00:52:04,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 491 flow. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:04,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:04,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-28 00:52:04,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:04,747 INFO L124 PetriNetUnfolderBase]: 1412/2978 cut-off events. [2024-06-28 00:52:04,747 INFO L125 PetriNetUnfolderBase]: For 6697/6730 co-relation queries the response was YES. [2024-06-28 00:52:04,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7918 conditions, 2978 events. 1412/2978 cut-off events. For 6697/6730 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 20643 event pairs, 567 based on Foata normal form. 6/2882 useless extension candidates. Maximal degree in co-relation 7402. Up to 1887 conditions per place. [2024-06-28 00:52:04,768 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 52 selfloop transitions, 9 changer transitions 0/113 dead transitions. [2024-06-28 00:52:04,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 113 transitions, 665 flow [2024-06-28 00:52:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 212 transitions. [2024-06-28 00:52:04,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-28 00:52:04,770 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 491 flow. Second operand 4 states and 212 transitions. [2024-06-28 00:52:04,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 113 transitions, 665 flow [2024-06-28 00:52:04,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 113 transitions, 665 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:04,777 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 531 flow [2024-06-28 00:52:04,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=531, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-06-28 00:52:04,778 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 31 predicate places. [2024-06-28 00:52:04,778 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 531 flow [2024-06-28 00:52:04,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:04,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:04,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:04,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:52:04,779 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:04,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash 360956095, now seen corresponding path program 1 times [2024-06-28 00:52:04,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:04,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364911600] [2024-06-28 00:52:04,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:04,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:04,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:04,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364911600] [2024-06-28 00:52:04,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364911600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:04,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:04,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:52:04,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328243065] [2024-06-28 00:52:04,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:04,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:04,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:04,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:04,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:04,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-28 00:52:04,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 531 flow. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:04,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:04,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-28 00:52:04,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:05,126 INFO L124 PetriNetUnfolderBase]: 1444/3019 cut-off events. [2024-06-28 00:52:05,127 INFO L125 PetriNetUnfolderBase]: For 9436/9466 co-relation queries the response was YES. [2024-06-28 00:52:05,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8634 conditions, 3019 events. 1444/3019 cut-off events. For 9436/9466 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 20610 event pairs, 640 based on Foata normal form. 1/2904 useless extension candidates. Maximal degree in co-relation 8389. Up to 2012 conditions per place. [2024-06-28 00:52:05,146 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 53 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2024-06-28 00:52:05,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 114 transitions, 703 flow [2024-06-28 00:52:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2024-06-28 00:52:05,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7033333333333334 [2024-06-28 00:52:05,148 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 531 flow. Second operand 4 states and 211 transitions. [2024-06-28 00:52:05,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 114 transitions, 703 flow [2024-06-28 00:52:05,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 114 transitions, 694 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:05,155 INFO L231 Difference]: Finished difference. Result has 100 places, 105 transitions, 564 flow [2024-06-28 00:52:05,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=564, PETRI_PLACES=100, PETRI_TRANSITIONS=105} [2024-06-28 00:52:05,156 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2024-06-28 00:52:05,156 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 105 transitions, 564 flow [2024-06-28 00:52:05,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:05,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:05,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:05,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:52:05,157 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:05,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash 664495948, now seen corresponding path program 1 times [2024-06-28 00:52:05,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:05,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88770252] [2024-06-28 00:52:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:05,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:05,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:05,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88770252] [2024-06-28 00:52:05,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88770252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:05,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:05,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:05,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979249746] [2024-06-28 00:52:05,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:05,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:05,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:05,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:05,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:05,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:05,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 105 transitions, 564 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:05,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:05,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:05,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:05,502 INFO L124 PetriNetUnfolderBase]: 1526/3256 cut-off events. [2024-06-28 00:52:05,502 INFO L125 PetriNetUnfolderBase]: For 11439/11492 co-relation queries the response was YES. [2024-06-28 00:52:05,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9452 conditions, 3256 events. 1526/3256 cut-off events. For 11439/11492 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 22821 event pairs, 496 based on Foata normal form. 4/3144 useless extension candidates. Maximal degree in co-relation 8842. Up to 1117 conditions per place. [2024-06-28 00:52:05,521 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 69 selfloop transitions, 17 changer transitions 0/136 dead transitions. [2024-06-28 00:52:05,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 136 transitions, 874 flow [2024-06-28 00:52:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:05,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-06-28 00:52:05,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7093333333333334 [2024-06-28 00:52:05,522 INFO L175 Difference]: Start difference. First operand has 100 places, 105 transitions, 564 flow. Second operand 5 states and 266 transitions. [2024-06-28 00:52:05,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 136 transitions, 874 flow [2024-06-28 00:52:05,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 866 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:05,530 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 645 flow [2024-06-28 00:52:05,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=645, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-28 00:52:05,531 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 39 predicate places. [2024-06-28 00:52:05,531 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 645 flow [2024-06-28 00:52:05,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:05,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:05,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:05,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:52:05,532 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:05,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1712885632, now seen corresponding path program 2 times [2024-06-28 00:52:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:05,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296879550] [2024-06-28 00:52:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:05,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:05,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:05,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296879550] [2024-06-28 00:52:05,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296879550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:05,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:05,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:05,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44186071] [2024-06-28 00:52:05,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:05,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:05,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:05,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 645 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:05,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:05,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:05,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:05,885 INFO L124 PetriNetUnfolderBase]: 1561/3195 cut-off events. [2024-06-28 00:52:05,885 INFO L125 PetriNetUnfolderBase]: For 15406/15482 co-relation queries the response was YES. [2024-06-28 00:52:05,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10462 conditions, 3195 events. 1561/3195 cut-off events. For 15406/15482 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 21725 event pairs, 458 based on Foata normal form. 4/3086 useless extension candidates. Maximal degree in co-relation 9863. Up to 1028 conditions per place. [2024-06-28 00:52:05,904 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 67 selfloop transitions, 22 changer transitions 0/139 dead transitions. [2024-06-28 00:52:05,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 963 flow [2024-06-28 00:52:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-06-28 00:52:05,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7093333333333334 [2024-06-28 00:52:05,906 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 645 flow. Second operand 5 states and 266 transitions. [2024-06-28 00:52:05,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 963 flow [2024-06-28 00:52:05,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 953 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:05,917 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 713 flow [2024-06-28 00:52:05,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=713, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-06-28 00:52:05,918 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 44 predicate places. [2024-06-28 00:52:05,918 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 713 flow [2024-06-28 00:52:05,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:05,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:05,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:05,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:52:05,919 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:05,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash 292660528, now seen corresponding path program 1 times [2024-06-28 00:52:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:05,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594497860] [2024-06-28 00:52:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:05,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:05,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:05,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594497860] [2024-06-28 00:52:05,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594497860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:05,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:05,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:05,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129204799] [2024-06-28 00:52:05,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:05,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:05,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:05,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:05,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:06,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:06,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 713 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:06,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:06,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:06,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:06,314 INFO L124 PetriNetUnfolderBase]: 1525/3218 cut-off events. [2024-06-28 00:52:06,314 INFO L125 PetriNetUnfolderBase]: For 18176/18217 co-relation queries the response was YES. [2024-06-28 00:52:06,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10579 conditions, 3218 events. 1525/3218 cut-off events. For 18176/18217 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 22533 event pairs, 490 based on Foata normal form. 12/3114 useless extension candidates. Maximal degree in co-relation 7959. Up to 1080 conditions per place. [2024-06-28 00:52:06,333 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 72 selfloop transitions, 19 changer transitions 0/141 dead transitions. [2024-06-28 00:52:06,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 141 transitions, 1027 flow [2024-06-28 00:52:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 265 transitions. [2024-06-28 00:52:06,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-28 00:52:06,334 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 713 flow. Second operand 5 states and 265 transitions. [2024-06-28 00:52:06,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 141 transitions, 1027 flow [2024-06-28 00:52:06,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 141 transitions, 993 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:06,346 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 748 flow [2024-06-28 00:52:06,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=748, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-06-28 00:52:06,347 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 47 predicate places. [2024-06-28 00:52:06,347 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 748 flow [2024-06-28 00:52:06,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:06,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:06,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:06,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:52:06,348 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:06,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:06,349 INFO L85 PathProgramCache]: Analyzing trace with hash 315669624, now seen corresponding path program 2 times [2024-06-28 00:52:06,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:06,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399303955] [2024-06-28 00:52:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:06,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:06,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:06,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399303955] [2024-06-28 00:52:06,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399303955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:06,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:06,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:06,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867880538] [2024-06-28 00:52:06,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:06,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:06,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:06,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:06,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:06,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:06,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 748 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:06,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:06,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:06,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:06,762 INFO L124 PetriNetUnfolderBase]: 1585/3365 cut-off events. [2024-06-28 00:52:06,763 INFO L125 PetriNetUnfolderBase]: For 22080/22133 co-relation queries the response was YES. [2024-06-28 00:52:06,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11540 conditions, 3365 events. 1585/3365 cut-off events. For 22080/22133 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 23669 event pairs, 492 based on Foata normal form. 10/3290 useless extension candidates. Maximal degree in co-relation 10809. Up to 1182 conditions per place. [2024-06-28 00:52:06,787 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 76 selfloop transitions, 22 changer transitions 0/148 dead transitions. [2024-06-28 00:52:06,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 1119 flow [2024-06-28 00:52:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-06-28 00:52:06,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.712 [2024-06-28 00:52:06,789 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 748 flow. Second operand 5 states and 267 transitions. [2024-06-28 00:52:06,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 1119 flow [2024-06-28 00:52:06,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 148 transitions, 1090 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:06,806 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 805 flow [2024-06-28 00:52:06,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=805, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2024-06-28 00:52:06,807 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 50 predicate places. [2024-06-28 00:52:06,807 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 805 flow [2024-06-28 00:52:06,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:06,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:06,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:06,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:52:06,808 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:06,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1195118576, now seen corresponding path program 1 times [2024-06-28 00:52:06,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:06,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850469246] [2024-06-28 00:52:06,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:06,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:06,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:06,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850469246] [2024-06-28 00:52:06,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850469246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:06,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:06,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:06,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781882836] [2024-06-28 00:52:06,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:06,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:06,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:06,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:06,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:06,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 75 [2024-06-28 00:52:06,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 805 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:06,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:06,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 75 [2024-06-28 00:52:06,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:07,410 INFO L124 PetriNetUnfolderBase]: 2263/4825 cut-off events. [2024-06-28 00:52:07,411 INFO L125 PetriNetUnfolderBase]: For 16923/17260 co-relation queries the response was YES. [2024-06-28 00:52:07,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14537 conditions, 4825 events. 2263/4825 cut-off events. For 16923/17260 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 37500 event pairs, 556 based on Foata normal form. 80/4498 useless extension candidates. Maximal degree in co-relation 14231. Up to 1864 conditions per place. [2024-06-28 00:52:07,445 INFO L140 encePairwiseOnDemand]: 58/75 looper letters, 96 selfloop transitions, 22 changer transitions 0/181 dead transitions. [2024-06-28 00:52:07,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 181 transitions, 1319 flow [2024-06-28 00:52:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 274 transitions. [2024-06-28 00:52:07,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7306666666666667 [2024-06-28 00:52:07,447 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 805 flow. Second operand 5 states and 274 transitions. [2024-06-28 00:52:07,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 181 transitions, 1319 flow [2024-06-28 00:52:07,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 181 transitions, 1291 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:07,479 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 943 flow [2024-06-28 00:52:07,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=943, PETRI_PLACES=122, PETRI_TRANSITIONS=134} [2024-06-28 00:52:07,481 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 56 predicate places. [2024-06-28 00:52:07,481 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 943 flow [2024-06-28 00:52:07,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:07,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:07,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:07,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:52:07,482 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:07,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:07,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1353068182, now seen corresponding path program 1 times [2024-06-28 00:52:07,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:07,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433755120] [2024-06-28 00:52:07,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:07,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:07,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:07,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433755120] [2024-06-28 00:52:07,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433755120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:07,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:07,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:52:07,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701741725] [2024-06-28 00:52:07,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:07,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:07,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:07,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:07,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:07,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 75 [2024-06-28 00:52:07,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 943 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:07,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:07,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 75 [2024-06-28 00:52:07,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:08,038 INFO L124 PetriNetUnfolderBase]: 2299/4918 cut-off events. [2024-06-28 00:52:08,039 INFO L125 PetriNetUnfolderBase]: For 41497/41604 co-relation queries the response was YES. [2024-06-28 00:52:08,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19300 conditions, 4918 events. 2299/4918 cut-off events. For 41497/41604 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 38064 event pairs, 975 based on Foata normal form. 3/4805 useless extension candidates. Maximal degree in co-relation 19020. Up to 3239 conditions per place. [2024-06-28 00:52:08,073 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 67 selfloop transitions, 8 changer transitions 0/140 dead transitions. [2024-06-28 00:52:08,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 140 transitions, 1107 flow [2024-06-28 00:52:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 207 transitions. [2024-06-28 00:52:08,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-06-28 00:52:08,075 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 943 flow. Second operand 4 states and 207 transitions. [2024-06-28 00:52:08,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 140 transitions, 1107 flow [2024-06-28 00:52:08,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 140 transitions, 1107 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:08,103 INFO L231 Difference]: Finished difference. Result has 126 places, 134 transitions, 964 flow [2024-06-28 00:52:08,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=964, PETRI_PLACES=126, PETRI_TRANSITIONS=134} [2024-06-28 00:52:08,104 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 60 predicate places. [2024-06-28 00:52:08,104 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 134 transitions, 964 flow [2024-06-28 00:52:08,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:08,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:08,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:08,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:52:08,105 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:08,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1205678665, now seen corresponding path program 1 times [2024-06-28 00:52:08,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:08,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558831279] [2024-06-28 00:52:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:08,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:08,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:08,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558831279] [2024-06-28 00:52:08,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558831279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:08,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:08,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:08,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040743968] [2024-06-28 00:52:08,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:08,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:08,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:08,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:08,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:08,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:08,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 134 transitions, 964 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:08,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:08,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:08,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:08,627 INFO L124 PetriNetUnfolderBase]: 2421/5088 cut-off events. [2024-06-28 00:52:08,628 INFO L125 PetriNetUnfolderBase]: For 47880/48002 co-relation queries the response was YES. [2024-06-28 00:52:08,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20316 conditions, 5088 events. 2421/5088 cut-off events. For 47880/48002 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 38662 event pairs, 757 based on Foata normal form. 16/5012 useless extension candidates. Maximal degree in co-relation 14394. Up to 1499 conditions per place. [2024-06-28 00:52:08,662 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 89 selfloop transitions, 18 changer transitions 0/169 dead transitions. [2024-06-28 00:52:08,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 169 transitions, 1396 flow [2024-06-28 00:52:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-06-28 00:52:08,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7146666666666667 [2024-06-28 00:52:08,664 INFO L175 Difference]: Start difference. First operand has 126 places, 134 transitions, 964 flow. Second operand 5 states and 268 transitions. [2024-06-28 00:52:08,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 169 transitions, 1396 flow [2024-06-28 00:52:08,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 169 transitions, 1366 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:08,700 INFO L231 Difference]: Finished difference. Result has 129 places, 140 transitions, 1064 flow [2024-06-28 00:52:08,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1064, PETRI_PLACES=129, PETRI_TRANSITIONS=140} [2024-06-28 00:52:08,700 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 63 predicate places. [2024-06-28 00:52:08,700 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 140 transitions, 1064 flow [2024-06-28 00:52:08,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:08,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:08,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:08,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:52:08,701 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:08,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash 412776755, now seen corresponding path program 2 times [2024-06-28 00:52:08,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:08,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641541077] [2024-06-28 00:52:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:08,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:08,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641541077] [2024-06-28 00:52:08,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641541077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:08,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:08,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:08,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128579296] [2024-06-28 00:52:08,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:08,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:08,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:08,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:08,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:08,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 140 transitions, 1064 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:08,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:08,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:08,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:09,279 INFO L124 PetriNetUnfolderBase]: 2451/5075 cut-off events. [2024-06-28 00:52:09,279 INFO L125 PetriNetUnfolderBase]: For 57117/57268 co-relation queries the response was YES. [2024-06-28 00:52:09,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21814 conditions, 5075 events. 2451/5075 cut-off events. For 57117/57268 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 38220 event pairs, 821 based on Foata normal form. 16/4957 useless extension candidates. Maximal degree in co-relation 15392. Up to 1641 conditions per place. [2024-06-28 00:52:09,322 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 81 selfloop transitions, 26 changer transitions 0/169 dead transitions. [2024-06-28 00:52:09,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 169 transitions, 1467 flow [2024-06-28 00:52:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-06-28 00:52:09,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.712 [2024-06-28 00:52:09,324 INFO L175 Difference]: Start difference. First operand has 129 places, 140 transitions, 1064 flow. Second operand 5 states and 267 transitions. [2024-06-28 00:52:09,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 169 transitions, 1467 flow [2024-06-28 00:52:09,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 169 transitions, 1448 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:09,377 INFO L231 Difference]: Finished difference. Result has 134 places, 144 transitions, 1178 flow [2024-06-28 00:52:09,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1178, PETRI_PLACES=134, PETRI_TRANSITIONS=144} [2024-06-28 00:52:09,378 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 68 predicate places. [2024-06-28 00:52:09,378 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 144 transitions, 1178 flow [2024-06-28 00:52:09,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:09,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:09,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:09,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:52:09,379 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:09,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash 379525070, now seen corresponding path program 1 times [2024-06-28 00:52:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:09,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654915960] [2024-06-28 00:52:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:09,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:09,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654915960] [2024-06-28 00:52:09,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654915960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:09,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:09,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:09,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36073218] [2024-06-28 00:52:09,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:09,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:09,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:09,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:09,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2024-06-28 00:52:09,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 144 transitions, 1178 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:09,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:09,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2024-06-28 00:52:09,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:09,938 INFO L124 PetriNetUnfolderBase]: 2215/4921 cut-off events. [2024-06-28 00:52:09,939 INFO L125 PetriNetUnfolderBase]: For 29975/30417 co-relation queries the response was YES. [2024-06-28 00:52:09,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18000 conditions, 4921 events. 2215/4921 cut-off events. For 29975/30417 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 39124 event pairs, 1001 based on Foata normal form. 132/4794 useless extension candidates. Maximal degree in co-relation 13512. Up to 2637 conditions per place. [2024-06-28 00:52:09,974 INFO L140 encePairwiseOnDemand]: 58/75 looper letters, 89 selfloop transitions, 46 changer transitions 0/202 dead transitions. [2024-06-28 00:52:09,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 1787 flow [2024-06-28 00:52:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 278 transitions. [2024-06-28 00:52:09,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7413333333333333 [2024-06-28 00:52:09,976 INFO L175 Difference]: Start difference. First operand has 134 places, 144 transitions, 1178 flow. Second operand 5 states and 278 transitions. [2024-06-28 00:52:09,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 1787 flow [2024-06-28 00:52:10,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 202 transitions, 1744 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:10,030 INFO L231 Difference]: Finished difference. Result has 139 places, 174 transitions, 1549 flow [2024-06-28 00:52:10,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1549, PETRI_PLACES=139, PETRI_TRANSITIONS=174} [2024-06-28 00:52:10,030 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 73 predicate places. [2024-06-28 00:52:10,030 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 174 transitions, 1549 flow [2024-06-28 00:52:10,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:10,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:10,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:10,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:52:10,031 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:10,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash 380601483, now seen corresponding path program 1 times [2024-06-28 00:52:10,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:10,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217747032] [2024-06-28 00:52:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:10,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:10,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:10,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217747032] [2024-06-28 00:52:10,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217747032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:10,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:10,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:10,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516708228] [2024-06-28 00:52:10,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:10,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:10,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:10,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:10,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 174 transitions, 1549 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:10,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:10,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:10,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:10,634 INFO L124 PetriNetUnfolderBase]: 2721/5663 cut-off events. [2024-06-28 00:52:10,634 INFO L125 PetriNetUnfolderBase]: For 74262/74514 co-relation queries the response was YES. [2024-06-28 00:52:10,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26700 conditions, 5663 events. 2721/5663 cut-off events. For 74262/74514 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 43643 event pairs, 932 based on Foata normal form. 19/5499 useless extension candidates. Maximal degree in co-relation 19852. Up to 1904 conditions per place. [2024-06-28 00:52:10,679 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 88 selfloop transitions, 26 changer transitions 0/198 dead transitions. [2024-06-28 00:52:10,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 1939 flow [2024-06-28 00:52:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 265 transitions. [2024-06-28 00:52:10,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-28 00:52:10,681 INFO L175 Difference]: Start difference. First operand has 139 places, 174 transitions, 1549 flow. Second operand 5 states and 265 transitions. [2024-06-28 00:52:10,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 1939 flow [2024-06-28 00:52:10,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 198 transitions, 1895 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:10,770 INFO L231 Difference]: Finished difference. Result has 143 places, 175 transitions, 1581 flow [2024-06-28 00:52:10,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1581, PETRI_PLACES=143, PETRI_TRANSITIONS=175} [2024-06-28 00:52:10,770 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 77 predicate places. [2024-06-28 00:52:10,770 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 175 transitions, 1581 flow [2024-06-28 00:52:10,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:10,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:10,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:10,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:52:10,771 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:10,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1617343698, now seen corresponding path program 2 times [2024-06-28 00:52:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:10,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950074544] [2024-06-28 00:52:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:10,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:10,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950074544] [2024-06-28 00:52:10,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950074544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:10,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:10,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250091164] [2024-06-28 00:52:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:10,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:10,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:10,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:10,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 175 transitions, 1581 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:10,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:10,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:10,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:11,446 INFO L124 PetriNetUnfolderBase]: 2709/5689 cut-off events. [2024-06-28 00:52:11,446 INFO L125 PetriNetUnfolderBase]: For 80551/80803 co-relation queries the response was YES. [2024-06-28 00:52:11,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27166 conditions, 5689 events. 2709/5689 cut-off events. For 80551/80803 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 43993 event pairs, 954 based on Foata normal form. 23/5586 useless extension candidates. Maximal degree in co-relation 20146. Up to 2102 conditions per place. [2024-06-28 00:52:11,490 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 88 selfloop transitions, 32 changer transitions 0/204 dead transitions. [2024-06-28 00:52:11,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 204 transitions, 2058 flow [2024-06-28 00:52:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 265 transitions. [2024-06-28 00:52:11,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-28 00:52:11,491 INFO L175 Difference]: Start difference. First operand has 143 places, 175 transitions, 1581 flow. Second operand 5 states and 265 transitions. [2024-06-28 00:52:11,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 204 transitions, 2058 flow [2024-06-28 00:52:11,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 204 transitions, 2016 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:11,572 INFO L231 Difference]: Finished difference. Result has 146 places, 180 transitions, 1677 flow [2024-06-28 00:52:11,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1677, PETRI_PLACES=146, PETRI_TRANSITIONS=180} [2024-06-28 00:52:11,573 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 80 predicate places. [2024-06-28 00:52:11,573 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 180 transitions, 1677 flow [2024-06-28 00:52:11,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:11,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:11,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:11,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:52:11,574 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:11,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:11,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1614695058, now seen corresponding path program 3 times [2024-06-28 00:52:11,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:11,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094162164] [2024-06-28 00:52:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:11,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:11,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:11,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094162164] [2024-06-28 00:52:11,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094162164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:11,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:11,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:11,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554354850] [2024-06-28 00:52:11,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:11,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:11,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:11,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:11,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 180 transitions, 1677 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:11,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:11,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:11,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:12,240 INFO L124 PetriNetUnfolderBase]: 2664/5613 cut-off events. [2024-06-28 00:52:12,241 INFO L125 PetriNetUnfolderBase]: For 88377/88610 co-relation queries the response was YES. [2024-06-28 00:52:12,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27451 conditions, 5613 events. 2664/5613 cut-off events. For 88377/88610 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 43325 event pairs, 887 based on Foata normal form. 45/5547 useless extension candidates. Maximal degree in co-relation 20311. Up to 1903 conditions per place. [2024-06-28 00:52:12,278 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 96 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-28 00:52:12,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 211 transitions, 2202 flow [2024-06-28 00:52:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-06-28 00:52:12,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.712 [2024-06-28 00:52:12,289 INFO L175 Difference]: Start difference. First operand has 146 places, 180 transitions, 1677 flow. Second operand 5 states and 267 transitions. [2024-06-28 00:52:12,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 211 transitions, 2202 flow [2024-06-28 00:52:12,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 211 transitions, 2142 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:12,361 INFO L231 Difference]: Finished difference. Result has 149 places, 186 transitions, 1779 flow [2024-06-28 00:52:12,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1779, PETRI_PLACES=149, PETRI_TRANSITIONS=186} [2024-06-28 00:52:12,361 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 83 predicate places. [2024-06-28 00:52:12,361 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 186 transitions, 1779 flow [2024-06-28 00:52:12,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:12,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:12,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:12,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:52:12,362 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:12,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:12,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1766438545, now seen corresponding path program 1 times [2024-06-28 00:52:12,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:12,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625367813] [2024-06-28 00:52:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:12,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:12,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:12,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625367813] [2024-06-28 00:52:12,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625367813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:12,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:12,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:12,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522693610] [2024-06-28 00:52:12,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:12,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:12,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:12,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2024-06-28 00:52:12,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 186 transitions, 1779 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:12,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:12,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2024-06-28 00:52:12,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:12,962 INFO L124 PetriNetUnfolderBase]: 2715/5848 cut-off events. [2024-06-28 00:52:12,962 INFO L125 PetriNetUnfolderBase]: For 51702/52163 co-relation queries the response was YES. [2024-06-28 00:52:12,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24678 conditions, 5848 events. 2715/5848 cut-off events. For 51702/52163 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 47460 event pairs, 1216 based on Foata normal form. 146/5672 useless extension candidates. Maximal degree in co-relation 16249. Up to 3044 conditions per place. [2024-06-28 00:52:13,011 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 144 selfloop transitions, 36 changer transitions 0/246 dead transitions. [2024-06-28 00:52:13,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 246 transitions, 2684 flow [2024-06-28 00:52:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-06-28 00:52:13,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7013333333333334 [2024-06-28 00:52:13,013 INFO L175 Difference]: Start difference. First operand has 149 places, 186 transitions, 1779 flow. Second operand 5 states and 263 transitions. [2024-06-28 00:52:13,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 246 transitions, 2684 flow [2024-06-28 00:52:13,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 246 transitions, 2605 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:13,102 INFO L231 Difference]: Finished difference. Result has 155 places, 199 transitions, 2052 flow [2024-06-28 00:52:13,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2052, PETRI_PLACES=155, PETRI_TRANSITIONS=199} [2024-06-28 00:52:13,102 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 89 predicate places. [2024-06-28 00:52:13,102 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 199 transitions, 2052 flow [2024-06-28 00:52:13,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:13,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:13,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:13,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:52:13,103 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:13,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:13,104 INFO L85 PathProgramCache]: Analyzing trace with hash 831115357, now seen corresponding path program 1 times [2024-06-28 00:52:13,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:13,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302085957] [2024-06-28 00:52:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:13,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:13,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302085957] [2024-06-28 00:52:13,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302085957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:13,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:13,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:13,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381557552] [2024-06-28 00:52:13,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:13,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:13,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:13,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:13,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 199 transitions, 2052 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:13,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:13,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:13,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:13,902 INFO L124 PetriNetUnfolderBase]: 2894/6144 cut-off events. [2024-06-28 00:52:13,902 INFO L125 PetriNetUnfolderBase]: For 111312/111548 co-relation queries the response was YES. [2024-06-28 00:52:13,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31370 conditions, 6144 events. 2894/6144 cut-off events. For 111312/111548 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 49182 event pairs, 1149 based on Foata normal form. 12/5972 useless extension candidates. Maximal degree in co-relation 17526. Up to 2424 conditions per place. [2024-06-28 00:52:13,960 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 103 selfloop transitions, 26 changer transitions 0/221 dead transitions. [2024-06-28 00:52:13,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 221 transitions, 2483 flow [2024-06-28 00:52:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2024-06-28 00:52:13,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6986666666666667 [2024-06-28 00:52:13,961 INFO L175 Difference]: Start difference. First operand has 155 places, 199 transitions, 2052 flow. Second operand 5 states and 262 transitions. [2024-06-28 00:52:13,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 221 transitions, 2483 flow [2024-06-28 00:52:14,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 221 transitions, 2471 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:14,080 INFO L231 Difference]: Finished difference. Result has 160 places, 200 transitions, 2119 flow [2024-06-28 00:52:14,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2119, PETRI_PLACES=160, PETRI_TRANSITIONS=200} [2024-06-28 00:52:14,080 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 94 predicate places. [2024-06-28 00:52:14,081 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 200 transitions, 2119 flow [2024-06-28 00:52:14,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:14,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:14,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:14,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:52:14,081 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:14,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1773693487, now seen corresponding path program 2 times [2024-06-28 00:52:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864622291] [2024-06-28 00:52:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:14,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:14,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864622291] [2024-06-28 00:52:14,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864622291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:14,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:14,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:14,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755891845] [2024-06-28 00:52:14,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:14,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:14,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:14,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:14,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:14,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:14,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 200 transitions, 2119 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:14,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:14,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:14,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:14,859 INFO L124 PetriNetUnfolderBase]: 2888/6106 cut-off events. [2024-06-28 00:52:14,859 INFO L125 PetriNetUnfolderBase]: For 122270/122524 co-relation queries the response was YES. [2024-06-28 00:52:14,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32102 conditions, 6106 events. 2888/6106 cut-off events. For 122270/122524 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 48662 event pairs, 1218 based on Foata normal form. 10/5921 useless extension candidates. Maximal degree in co-relation 17918. Up to 2426 conditions per place. [2024-06-28 00:52:14,911 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 104 selfloop transitions, 28 changer transitions 0/224 dead transitions. [2024-06-28 00:52:14,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 224 transitions, 2599 flow [2024-06-28 00:52:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-06-28 00:52:14,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7013333333333334 [2024-06-28 00:52:14,912 INFO L175 Difference]: Start difference. First operand has 160 places, 200 transitions, 2119 flow. Second operand 5 states and 263 transitions. [2024-06-28 00:52:14,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 224 transitions, 2599 flow [2024-06-28 00:52:15,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 224 transitions, 2560 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:15,115 INFO L231 Difference]: Finished difference. Result has 163 places, 203 transitions, 2203 flow [2024-06-28 00:52:15,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2203, PETRI_PLACES=163, PETRI_TRANSITIONS=203} [2024-06-28 00:52:15,116 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 97 predicate places. [2024-06-28 00:52:15,116 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 203 transitions, 2203 flow [2024-06-28 00:52:15,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:15,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:15,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:15,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:52:15,116 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:15,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1884697179, now seen corresponding path program 3 times [2024-06-28 00:52:15,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:15,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178480246] [2024-06-28 00:52:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:15,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:15,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178480246] [2024-06-28 00:52:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178480246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:15,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:15,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:15,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280213097] [2024-06-28 00:52:15,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:15,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:15,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:15,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:15,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 203 transitions, 2203 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:15,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:15,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:15,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:15,865 INFO L124 PetriNetUnfolderBase]: 2934/6179 cut-off events. [2024-06-28 00:52:15,865 INFO L125 PetriNetUnfolderBase]: For 132868/133145 co-relation queries the response was YES. [2024-06-28 00:52:15,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32896 conditions, 6179 events. 2934/6179 cut-off events. For 132868/133145 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 48460 event pairs, 1164 based on Foata normal form. 19/6063 useless extension candidates. Maximal degree in co-relation 19654. Up to 2107 conditions per place. [2024-06-28 00:52:15,922 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 124 selfloop transitions, 17 changer transitions 0/233 dead transitions. [2024-06-28 00:52:15,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 233 transitions, 2756 flow [2024-06-28 00:52:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 265 transitions. [2024-06-28 00:52:15,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-28 00:52:15,925 INFO L175 Difference]: Start difference. First operand has 163 places, 203 transitions, 2203 flow. Second operand 5 states and 265 transitions. [2024-06-28 00:52:15,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 233 transitions, 2756 flow [2024-06-28 00:52:16,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 233 transitions, 2711 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:16,068 INFO L231 Difference]: Finished difference. Result has 166 places, 203 transitions, 2198 flow [2024-06-28 00:52:16,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2198, PETRI_PLACES=166, PETRI_TRANSITIONS=203} [2024-06-28 00:52:16,069 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 100 predicate places. [2024-06-28 00:52:16,069 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 203 transitions, 2198 flow [2024-06-28 00:52:16,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:16,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:16,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:16,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:52:16,069 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:16,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:16,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1753707756, now seen corresponding path program 1 times [2024-06-28 00:52:16,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:16,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792213454] [2024-06-28 00:52:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:16,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:16,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:16,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792213454] [2024-06-28 00:52:16,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792213454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:16,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:16,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:16,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901880722] [2024-06-28 00:52:16,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:16,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:16,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:16,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:16,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 203 transitions, 2198 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:16,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:16,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:16,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:16,936 INFO L124 PetriNetUnfolderBase]: 3324/6855 cut-off events. [2024-06-28 00:52:16,936 INFO L125 PetriNetUnfolderBase]: For 163926/164234 co-relation queries the response was YES. [2024-06-28 00:52:16,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37094 conditions, 6855 events. 3324/6855 cut-off events. For 163926/164234 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 54426 event pairs, 1267 based on Foata normal form. 40/6747 useless extension candidates. Maximal degree in co-relation 36610. Up to 3335 conditions per place. [2024-06-28 00:52:16,994 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 115 selfloop transitions, 23 changer transitions 1/231 dead transitions. [2024-06-28 00:52:16,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 231 transitions, 2724 flow [2024-06-28 00:52:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 261 transitions. [2024-06-28 00:52:16,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696 [2024-06-28 00:52:16,995 INFO L175 Difference]: Start difference. First operand has 166 places, 203 transitions, 2198 flow. Second operand 5 states and 261 transitions. [2024-06-28 00:52:16,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 231 transitions, 2724 flow [2024-06-28 00:52:17,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 231 transitions, 2607 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 00:52:17,184 INFO L231 Difference]: Finished difference. Result has 167 places, 209 transitions, 2237 flow [2024-06-28 00:52:17,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2237, PETRI_PLACES=167, PETRI_TRANSITIONS=209} [2024-06-28 00:52:17,185 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 101 predicate places. [2024-06-28 00:52:17,185 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 209 transitions, 2237 flow [2024-06-28 00:52:17,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:17,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:17,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:17,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:52:17,185 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:17,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:17,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1943668790, now seen corresponding path program 1 times [2024-06-28 00:52:17,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:17,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464457230] [2024-06-28 00:52:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:17,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:17,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:17,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464457230] [2024-06-28 00:52:17,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464457230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:17,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:17,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:17,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335511078] [2024-06-28 00:52:17,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:17,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:17,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:17,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:17,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:17,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 209 transitions, 2237 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:17,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:17,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:17,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:17,990 INFO L124 PetriNetUnfolderBase]: 3099/6608 cut-off events. [2024-06-28 00:52:17,990 INFO L125 PetriNetUnfolderBase]: For 176464/176725 co-relation queries the response was YES. [2024-06-28 00:52:18,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37251 conditions, 6608 events. 3099/6608 cut-off events. For 176464/176725 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 53195 event pairs, 865 based on Foata normal form. 31/6478 useless extension candidates. Maximal degree in co-relation 36858. Up to 3257 conditions per place. [2024-06-28 00:52:18,055 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 129 selfloop transitions, 16 changer transitions 2/239 dead transitions. [2024-06-28 00:52:18,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 239 transitions, 2780 flow [2024-06-28 00:52:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2024-06-28 00:52:18,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.704 [2024-06-28 00:52:18,056 INFO L175 Difference]: Start difference. First operand has 167 places, 209 transitions, 2237 flow. Second operand 5 states and 264 transitions. [2024-06-28 00:52:18,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 239 transitions, 2780 flow [2024-06-28 00:52:18,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 239 transitions, 2756 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:18,238 INFO L231 Difference]: Finished difference. Result has 172 places, 211 transitions, 2304 flow [2024-06-28 00:52:18,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2304, PETRI_PLACES=172, PETRI_TRANSITIONS=211} [2024-06-28 00:52:18,239 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 106 predicate places. [2024-06-28 00:52:18,239 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 211 transitions, 2304 flow [2024-06-28 00:52:18,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:18,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:18,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:18,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:52:18,239 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:18,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash -213596841, now seen corresponding path program 1 times [2024-06-28 00:52:18,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:18,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747415754] [2024-06-28 00:52:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:18,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:18,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:18,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747415754] [2024-06-28 00:52:18,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747415754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:18,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:18,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:18,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56885975] [2024-06-28 00:52:18,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:18,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:18,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:18,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:18,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:18,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 211 transitions, 2304 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:18,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:18,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:18,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:19,108 INFO L124 PetriNetUnfolderBase]: 3315/6832 cut-off events. [2024-06-28 00:52:19,108 INFO L125 PetriNetUnfolderBase]: For 194139/194445 co-relation queries the response was YES. [2024-06-28 00:52:19,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39760 conditions, 6832 events. 3315/6832 cut-off events. For 194139/194445 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 54674 event pairs, 2044 based on Foata normal form. 13/6611 useless extension candidates. Maximal degree in co-relation 29797. Up to 4670 conditions per place. [2024-06-28 00:52:19,180 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 109 selfloop transitions, 27 changer transitions 0/228 dead transitions. [2024-06-28 00:52:19,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 228 transitions, 2698 flow [2024-06-28 00:52:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 256 transitions. [2024-06-28 00:52:19,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826666666666666 [2024-06-28 00:52:19,181 INFO L175 Difference]: Start difference. First operand has 172 places, 211 transitions, 2304 flow. Second operand 5 states and 256 transitions. [2024-06-28 00:52:19,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 228 transitions, 2698 flow [2024-06-28 00:52:19,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 228 transitions, 2685 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:19,415 INFO L231 Difference]: Finished difference. Result has 176 places, 213 transitions, 2377 flow [2024-06-28 00:52:19,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2377, PETRI_PLACES=176, PETRI_TRANSITIONS=213} [2024-06-28 00:52:19,415 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 110 predicate places. [2024-06-28 00:52:19,416 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 213 transitions, 2377 flow [2024-06-28 00:52:19,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:19,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:19,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:19,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:52:19,416 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:19,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1701642415, now seen corresponding path program 2 times [2024-06-28 00:52:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:19,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266235834] [2024-06-28 00:52:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:19,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:19,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266235834] [2024-06-28 00:52:19,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266235834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:19,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:19,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:19,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154617407] [2024-06-28 00:52:19,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:19,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:19,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:19,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:19,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:19,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 213 transitions, 2377 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:19,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:19,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:19,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:20,343 INFO L124 PetriNetUnfolderBase]: 3406/7060 cut-off events. [2024-06-28 00:52:20,343 INFO L125 PetriNetUnfolderBase]: For 208214/208526 co-relation queries the response was YES. [2024-06-28 00:52:20,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41536 conditions, 7060 events. 3406/7060 cut-off events. For 208214/208526 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 56216 event pairs, 1527 based on Foata normal form. 28/6933 useless extension candidates. Maximal degree in co-relation 31359. Up to 2921 conditions per place. [2024-06-28 00:52:20,403 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 132 selfloop transitions, 24 changer transitions 0/248 dead transitions. [2024-06-28 00:52:20,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 248 transitions, 3086 flow [2024-06-28 00:52:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-06-28 00:52:20,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6906666666666667 [2024-06-28 00:52:20,404 INFO L175 Difference]: Start difference. First operand has 176 places, 213 transitions, 2377 flow. Second operand 5 states and 259 transitions. [2024-06-28 00:52:20,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 248 transitions, 3086 flow [2024-06-28 00:52:20,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 248 transitions, 3048 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:20,596 INFO L231 Difference]: Finished difference. Result has 179 places, 219 transitions, 2477 flow [2024-06-28 00:52:20,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2477, PETRI_PLACES=179, PETRI_TRANSITIONS=219} [2024-06-28 00:52:20,597 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 113 predicate places. [2024-06-28 00:52:20,597 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 219 transitions, 2477 flow [2024-06-28 00:52:20,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:20,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:20,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:20,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:52:20,598 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:20,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:20,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1686061195, now seen corresponding path program 3 times [2024-06-28 00:52:20,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:20,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585602966] [2024-06-28 00:52:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:20,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:20,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:20,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585602966] [2024-06-28 00:52:20,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585602966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:20,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:20,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:20,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480943436] [2024-06-28 00:52:20,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:20,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:20,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:20,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:20,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:20,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:20,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 219 transitions, 2477 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:20,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:20,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:20,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:21,509 INFO L124 PetriNetUnfolderBase]: 3174/6627 cut-off events. [2024-06-28 00:52:21,509 INFO L125 PetriNetUnfolderBase]: For 211337/211648 co-relation queries the response was YES. [2024-06-28 00:52:21,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40042 conditions, 6627 events. 3174/6627 cut-off events. For 211337/211648 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 52353 event pairs, 1398 based on Foata normal form. 158/6641 useless extension candidates. Maximal degree in co-relation 30697. Up to 2915 conditions per place. [2024-06-28 00:52:21,597 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 135 selfloop transitions, 28 changer transitions 0/255 dead transitions. [2024-06-28 00:52:21,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 255 transitions, 3185 flow [2024-06-28 00:52:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-06-28 00:52:21,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7146666666666667 [2024-06-28 00:52:21,599 INFO L175 Difference]: Start difference. First operand has 179 places, 219 transitions, 2477 flow. Second operand 5 states and 268 transitions. [2024-06-28 00:52:21,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 255 transitions, 3185 flow [2024-06-28 00:52:21,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 255 transitions, 3165 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:21,968 INFO L231 Difference]: Finished difference. Result has 185 places, 221 transitions, 2567 flow [2024-06-28 00:52:21,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2457, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2567, PETRI_PLACES=185, PETRI_TRANSITIONS=221} [2024-06-28 00:52:21,969 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 119 predicate places. [2024-06-28 00:52:21,969 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 221 transitions, 2567 flow [2024-06-28 00:52:21,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:21,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:21,969 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] [2024-06-28 00:52:21,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:52:21,969 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:21,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1564046821, now seen corresponding path program 1 times [2024-06-28 00:52:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:21,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662830365] [2024-06-28 00:52:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:21,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:21,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:21,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662830365] [2024-06-28 00:52:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662830365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:21,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:21,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:21,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90300787] [2024-06-28 00:52:21,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:21,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:22,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2024-06-28 00:52:22,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 221 transitions, 2567 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:22,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:22,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2024-06-28 00:52:22,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:22,734 INFO L124 PetriNetUnfolderBase]: 2572/5640 cut-off events. [2024-06-28 00:52:22,734 INFO L125 PetriNetUnfolderBase]: For 103357/103947 co-relation queries the response was YES. [2024-06-28 00:52:22,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28561 conditions, 5640 events. 2572/5640 cut-off events. For 103357/103947 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 44946 event pairs, 986 based on Foata normal form. 109/5441 useless extension candidates. Maximal degree in co-relation 20483. Up to 2175 conditions per place. [2024-06-28 00:52:22,784 INFO L140 encePairwiseOnDemand]: 58/75 looper letters, 147 selfloop transitions, 58 changer transitions 0/278 dead transitions. [2024-06-28 00:52:22,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 278 transitions, 3412 flow [2024-06-28 00:52:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 271 transitions. [2024-06-28 00:52:22,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7226666666666667 [2024-06-28 00:52:22,785 INFO L175 Difference]: Start difference. First operand has 185 places, 221 transitions, 2567 flow. Second operand 5 states and 271 transitions. [2024-06-28 00:52:22,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 278 transitions, 3412 flow [2024-06-28 00:52:22,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 278 transitions, 3372 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:22,923 INFO L231 Difference]: Finished difference. Result has 190 places, 250 transitions, 3109 flow [2024-06-28 00:52:22,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3109, PETRI_PLACES=190, PETRI_TRANSITIONS=250} [2024-06-28 00:52:22,924 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 124 predicate places. [2024-06-28 00:52:22,924 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 250 transitions, 3109 flow [2024-06-28 00:52:22,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:22,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:22,924 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] [2024-06-28 00:52:22,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:52:22,924 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:22,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -213020445, now seen corresponding path program 1 times [2024-06-28 00:52:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:22,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634860480] [2024-06-28 00:52:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:22,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:22,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634860480] [2024-06-28 00:52:22,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634860480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:22,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:22,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:22,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446206835] [2024-06-28 00:52:22,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:22,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:22,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:23,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:23,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 250 transitions, 3109 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:23,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:23,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:23,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:23,874 INFO L124 PetriNetUnfolderBase]: 2928/6164 cut-off events. [2024-06-28 00:52:23,874 INFO L125 PetriNetUnfolderBase]: For 223372/223742 co-relation queries the response was YES. [2024-06-28 00:52:23,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39950 conditions, 6164 events. 2928/6164 cut-off events. For 223372/223742 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 47949 event pairs, 1229 based on Foata normal form. 33/6021 useless extension candidates. Maximal degree in co-relation 27360. Up to 2554 conditions per place. [2024-06-28 00:52:23,935 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 131 selfloop transitions, 28 changer transitions 0/275 dead transitions. [2024-06-28 00:52:23,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 275 transitions, 3755 flow [2024-06-28 00:52:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 261 transitions. [2024-06-28 00:52:23,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696 [2024-06-28 00:52:23,936 INFO L175 Difference]: Start difference. First operand has 190 places, 250 transitions, 3109 flow. Second operand 5 states and 261 transitions. [2024-06-28 00:52:23,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 275 transitions, 3755 flow [2024-06-28 00:52:24,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 275 transitions, 3683 flow, removed 36 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:24,175 INFO L231 Difference]: Finished difference. Result has 195 places, 254 transitions, 3170 flow [2024-06-28 00:52:24,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3170, PETRI_PLACES=195, PETRI_TRANSITIONS=254} [2024-06-28 00:52:24,176 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 129 predicate places. [2024-06-28 00:52:24,176 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 254 transitions, 3170 flow [2024-06-28 00:52:24,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:24,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:24,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:24,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:52:24,176 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:24,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash 609554495, now seen corresponding path program 2 times [2024-06-28 00:52:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:24,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274084470] [2024-06-28 00:52:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:24,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:24,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274084470] [2024-06-28 00:52:24,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274084470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:24,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:24,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:24,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811995167] [2024-06-28 00:52:24,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:24,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:24,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:24,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:24,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:24,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2024-06-28 00:52:24,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 254 transitions, 3170 flow. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:24,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:24,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2024-06-28 00:52:24,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:24,939 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([368] L749-1-->L756: Formula: (= v_~flag1~0_11 0) InVars {} OutVars{~flag1~0=v_~flag1~0_11} AuxVars[] AssignedVars[~flag1~0][224], [Black: 257#(and (= ~flag2~0 4) (= ~flag1~0 1) (= ~x~0 1)), 154#(<= ~flag1~0 0), Black: 130#(and (= ~x~0 0) (= ~flag1~0 3)), Black: 131#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 3)), Black: 263#(and (= ~flag2~0 4) (= ~flag1~0 1) (= ~x~0 1)), Black: 138#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 3)), 239#(= ~flag1~0 0), Black: 268#(and (= ~flag2~0 4) (= ~x~0 1)), Black: 269#(and (= ~flag2~0 4) (= ~flag1~0 1) (= ~x~0 1)), Black: 144#(and (= ~x~0 0) (= ~flag1~0 1) (= ~flag2~0 3)), Black: 150#(and (= ~x~0 0) (= ~flag1~0 1) (= ~flag2~0 3)), Black: 277#(and (= ~flag1~0 4) (= thr2Thread1of1ForFork1_~f12~0 4)), Black: 274#(= ~flag1~0 4), Black: 272#true, 142#(= ~x~0 0), 285#(= ~x~0 0), Black: 157#(and (<= ~flag1~0 0) (<= thr2Thread1of1ForFork1_~f12~0 0)), 261#(= ~flag2~0 4), Black: 287#(and (= ~x~0 0) (= 2 ~flag1~0) (= ~flag2~0 3)), Black: 155#(<= thr2Thread1of1ForFork1_~f12~0 0), 289#true, Black: 164#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 4)), 148#(= ~x~0 0), 108#true, Black: 170#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 4)), Black: 169#(and (= ~x~0 0) (= ~flag1~0 4)), Black: 177#(and (= ~x~0 0) (= ~flag2~0 1)), Black: 178#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 4)), 31#L799true, Black: 183#(= ~flag1~0 3), Black: 186#(and (= 3 thr2Thread1of1ForFork1_~f12~0) (= ~flag1~0 3)), Black: 184#(= 3 thr2Thread1of1ForFork1_~f12~0), Black: 195#(and (= ~x~0 0) (= ~flag2~0 1) (= 2 ~flag1~0)), 88#true, thr2Thread1of1ForFork1InUse, Black: 201#(and (= ~x~0 0) (= ~flag2~0 3) (= ~flag1~0 3)), Black: 75#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 0)), 275#(= thr2Thread1of1ForFork1_~f12~0 4), 209#true, Black: 207#(and (= ~x~0 0) (= ~flag2~0 3) (= ~flag1~0 3)), Black: 80#(and (= ~x~0 0) (= ~flag1~0 1) (= ~flag2~0 0)), Black: 211#(= ~flag1~0 1), Black: 86#(and (= ~x~0 0) (= ~flag1~0 3) (= ~flag2~0 0)), Black: 214#(and (= thr2Thread1of1ForFork1_~f12~0 1) (= ~flag1~0 1)), 168#(= ~x~0 0), Black: 212#(= thr2Thread1of1ForFork1_~f12~0 1), Black: 90#(and (= ~flag1~0 0) (= ~x~0 0)), Black: 91#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 1)), Black: 223#(and (= ~x~0 0) (= ~flag1~0 1) (= 2 ~flag2~0)), Black: 98#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 1)), Black: 94#true, 29#ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANTtrue, Black: 229#(and (= ~x~0 0) (= ~flag2~0 4) (= ~flag1~0 1)), Black: 106#(and (= ~x~0 0) (= ~flag2~0 1) (= ~flag1~0 1)), 234#(and (= ~x~0 0) (= ~flag2~0 4)), Black: 235#(and (= ~x~0 0) (= ~flag2~0 4) (= ~flag1~0 1)), 267#(= ~flag2~0 4), 17#L756true, Black: 240#(and (= ~flag1~0 0) (= ~flag2~0 4)), Black: 111#(= thr1Thread1of1ForFork0_~f21~0 0), Black: 113#(and (= thr1Thread1of1ForFork0_~f21~0 0) (= ~flag2~0 0)), Black: 241#(and (= ~flag1~0 0) (= ~flag2~0 4) (= ~x~0 1)), Black: 110#(= ~flag2~0 0), Black: 120#(and (= ~x~0 0) (= ~flag1~0 4) (= ~flag2~0 0)), Black: 248#(and (= ~x~0 0) (= ~flag2~0 0)), 129#(= ~x~0 0), Black: 249#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 0)), Black: 125#(and (= ~flag1~0 0) (= ~x~0 0) (= ~flag2~0 3))]) [2024-06-28 00:52:24,939 INFO L294 olderBase$Statistics]: this new event has 34 ancestors and is cut-off event [2024-06-28 00:52:24,939 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-06-28 00:52:24,940 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-06-28 00:52:24,940 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-06-28 00:52:25,158 INFO L124 PetriNetUnfolderBase]: 2928/6131 cut-off events. [2024-06-28 00:52:25,158 INFO L125 PetriNetUnfolderBase]: For 134067/134885 co-relation queries the response was YES. [2024-06-28 00:52:25,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33887 conditions, 6131 events. 2928/6131 cut-off events. For 134067/134885 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 48187 event pairs, 1498 based on Foata normal form. 129/5861 useless extension candidates. Maximal degree in co-relation 23388. Up to 3679 conditions per place. [2024-06-28 00:52:25,228 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 111 selfloop transitions, 26 changer transitions 1/298 dead transitions. [2024-06-28 00:52:25,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 298 transitions, 3753 flow [2024-06-28 00:52:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-06-28 00:52:25,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6853333333333333 [2024-06-28 00:52:25,229 INFO L175 Difference]: Start difference. First operand has 195 places, 254 transitions, 3170 flow. Second operand 5 states and 257 transitions. [2024-06-28 00:52:25,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 298 transitions, 3753 flow [2024-06-28 00:52:25,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 298 transitions, 3645 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:25,473 INFO L231 Difference]: Finished difference. Result has 200 places, 258 transitions, 3195 flow [2024-06-28 00:52:25,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3195, PETRI_PLACES=200, PETRI_TRANSITIONS=258} [2024-06-28 00:52:25,474 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 134 predicate places. [2024-06-28 00:52:25,474 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 258 transitions, 3195 flow [2024-06-28 00:52:25,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:25,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:25,474 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] [2024-06-28 00:52:25,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:52:25,475 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:25,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1930488173, now seen corresponding path program 3 times [2024-06-28 00:52:25,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:25,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91890445] [2024-06-28 00:52:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:25,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:25,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:25,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91890445] [2024-06-28 00:52:25,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91890445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:25,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:25,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:25,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840060571] [2024-06-28 00:52:25,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:25,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:25,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:25,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:25,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:25,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:25,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 258 transitions, 3195 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:25,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:25,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:25,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:26,481 INFO L124 PetriNetUnfolderBase]: 2857/6192 cut-off events. [2024-06-28 00:52:26,481 INFO L125 PetriNetUnfolderBase]: For 242259/242617 co-relation queries the response was YES. [2024-06-28 00:52:26,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41188 conditions, 6192 events. 2857/6192 cut-off events. For 242259/242617 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 49433 event pairs, 1088 based on Foata normal form. 45/6060 useless extension candidates. Maximal degree in co-relation 31043. Up to 2322 conditions per place. [2024-06-28 00:52:26,542 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 120 selfloop transitions, 44 changer transitions 0/285 dead transitions. [2024-06-28 00:52:26,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 285 transitions, 3849 flow [2024-06-28 00:52:26,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2024-06-28 00:52:26,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.704 [2024-06-28 00:52:26,543 INFO L175 Difference]: Start difference. First operand has 200 places, 258 transitions, 3195 flow. Second operand 5 states and 264 transitions. [2024-06-28 00:52:26,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 285 transitions, 3849 flow [2024-06-28 00:52:26,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 285 transitions, 3845 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:26,846 INFO L231 Difference]: Finished difference. Result has 206 places, 264 transitions, 3437 flow [2024-06-28 00:52:26,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3437, PETRI_PLACES=206, PETRI_TRANSITIONS=264} [2024-06-28 00:52:26,847 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 140 predicate places. [2024-06-28 00:52:26,847 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 264 transitions, 3437 flow [2024-06-28 00:52:26,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:26,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:26,847 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] [2024-06-28 00:52:26,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:52:26,847 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:26,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash -277146627, now seen corresponding path program 1 times [2024-06-28 00:52:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:26,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28827058] [2024-06-28 00:52:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:26,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:26,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:26,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28827058] [2024-06-28 00:52:26,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28827058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:26,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:26,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785492084] [2024-06-28 00:52:26,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:26,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:26,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:26,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:26,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 264 transitions, 3437 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:26,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:26,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:26,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:27,807 INFO L124 PetriNetUnfolderBase]: 2929/6350 cut-off events. [2024-06-28 00:52:27,808 INFO L125 PetriNetUnfolderBase]: For 255918/256299 co-relation queries the response was YES. [2024-06-28 00:52:27,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43275 conditions, 6350 events. 2929/6350 cut-off events. For 255918/256299 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 50810 event pairs, 1155 based on Foata normal form. 32/6213 useless extension candidates. Maximal degree in co-relation 32642. Up to 2569 conditions per place. [2024-06-28 00:52:27,874 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 117 selfloop transitions, 49 changer transitions 0/287 dead transitions. [2024-06-28 00:52:27,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 287 transitions, 4066 flow [2024-06-28 00:52:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2024-06-28 00:52:27,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6986666666666667 [2024-06-28 00:52:27,875 INFO L175 Difference]: Start difference. First operand has 206 places, 264 transitions, 3437 flow. Second operand 5 states and 262 transitions. [2024-06-28 00:52:27,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 287 transitions, 4066 flow [2024-06-28 00:52:28,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 287 transitions, 3990 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:28,163 INFO L231 Difference]: Finished difference. Result has 209 places, 268 transitions, 3542 flow [2024-06-28 00:52:28,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3542, PETRI_PLACES=209, PETRI_TRANSITIONS=268} [2024-06-28 00:52:28,164 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 143 predicate places. [2024-06-28 00:52:28,164 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 268 transitions, 3542 flow [2024-06-28 00:52:28,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:28,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:28,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:28,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:52:28,164 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:28,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:28,165 INFO L85 PathProgramCache]: Analyzing trace with hash -277978047, now seen corresponding path program 2 times [2024-06-28 00:52:28,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:28,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694956456] [2024-06-28 00:52:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:28,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:28,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:28,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694956456] [2024-06-28 00:52:28,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694956456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:28,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:28,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:28,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895404553] [2024-06-28 00:52:28,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:28,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:28,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:28,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:28,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 268 transitions, 3542 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:28,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:28,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:28,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:29,120 INFO L124 PetriNetUnfolderBase]: 2882/6257 cut-off events. [2024-06-28 00:52:29,120 INFO L125 PetriNetUnfolderBase]: For 267952/268278 co-relation queries the response was YES. [2024-06-28 00:52:29,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42907 conditions, 6257 events. 2882/6257 cut-off events. For 267952/268278 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 49891 event pairs, 1161 based on Foata normal form. 27/6123 useless extension candidates. Maximal degree in co-relation 32208. Up to 2376 conditions per place. [2024-06-28 00:52:29,189 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 152 selfloop transitions, 24 changer transitions 0/297 dead transitions. [2024-06-28 00:52:29,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 297 transitions, 4286 flow [2024-06-28 00:52:29,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-06-28 00:52:29,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7013333333333334 [2024-06-28 00:52:29,191 INFO L175 Difference]: Start difference. First operand has 209 places, 268 transitions, 3542 flow. Second operand 5 states and 263 transitions. [2024-06-28 00:52:29,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 297 transitions, 4286 flow [2024-06-28 00:52:29,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 297 transitions, 4200 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:29,580 INFO L231 Difference]: Finished difference. Result has 212 places, 272 transitions, 3603 flow [2024-06-28 00:52:29,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3603, PETRI_PLACES=212, PETRI_TRANSITIONS=272} [2024-06-28 00:52:29,581 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 146 predicate places. [2024-06-28 00:52:29,581 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 272 transitions, 3603 flow [2024-06-28 00:52:29,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:29,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:29,581 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] [2024-06-28 00:52:29,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:52:29,581 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:29,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:29,581 INFO L85 PathProgramCache]: Analyzing trace with hash 579941435, now seen corresponding path program 1 times [2024-06-28 00:52:29,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:29,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88910513] [2024-06-28 00:52:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:29,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:29,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:29,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88910513] [2024-06-28 00:52:29,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88910513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:29,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:29,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:29,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665027008] [2024-06-28 00:52:29,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:29,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:29,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:29,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:29,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:29,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:29,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 272 transitions, 3603 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:29,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:29,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:29,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:30,641 INFO L124 PetriNetUnfolderBase]: 2900/6278 cut-off events. [2024-06-28 00:52:30,641 INFO L125 PetriNetUnfolderBase]: For 282537/282911 co-relation queries the response was YES. [2024-06-28 00:52:30,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43497 conditions, 6278 events. 2900/6278 cut-off events. For 282537/282911 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 50057 event pairs, 1179 based on Foata normal form. 25/6136 useless extension candidates. Maximal degree in co-relation 32663. Up to 2563 conditions per place. [2024-06-28 00:52:30,702 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 116 selfloop transitions, 58 changer transitions 0/295 dead transitions. [2024-06-28 00:52:30,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 295 transitions, 4268 flow [2024-06-28 00:52:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2024-06-28 00:52:30,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6986666666666667 [2024-06-28 00:52:30,704 INFO L175 Difference]: Start difference. First operand has 212 places, 272 transitions, 3603 flow. Second operand 5 states and 262 transitions. [2024-06-28 00:52:30,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 295 transitions, 4268 flow [2024-06-28 00:52:31,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 295 transitions, 4175 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:31,079 INFO L231 Difference]: Finished difference. Result has 214 places, 276 transitions, 3722 flow [2024-06-28 00:52:31,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3510, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3722, PETRI_PLACES=214, PETRI_TRANSITIONS=276} [2024-06-28 00:52:31,079 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 148 predicate places. [2024-06-28 00:52:31,079 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 276 transitions, 3722 flow [2024-06-28 00:52:31,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:31,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:31,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:31,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:52:31,080 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:31,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:31,080 INFO L85 PathProgramCache]: Analyzing trace with hash 608569563, now seen corresponding path program 2 times [2024-06-28 00:52:31,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:31,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643492789] [2024-06-28 00:52:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:31,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:31,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:31,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643492789] [2024-06-28 00:52:31,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643492789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:31,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:31,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:31,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966248939] [2024-06-28 00:52:31,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:31,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:31,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:31,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:31,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 276 transitions, 3722 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:31,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:31,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:31,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:32,065 INFO L124 PetriNetUnfolderBase]: 2805/6092 cut-off events. [2024-06-28 00:52:32,065 INFO L125 PetriNetUnfolderBase]: For 292835/293168 co-relation queries the response was YES. [2024-06-28 00:52:32,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42587 conditions, 6092 events. 2805/6092 cut-off events. For 292835/293168 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 48413 event pairs, 1079 based on Foata normal form. 36/5962 useless extension candidates. Maximal degree in co-relation 31854. Up to 2280 conditions per place. [2024-06-28 00:52:32,131 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 137 selfloop transitions, 41 changer transitions 0/299 dead transitions. [2024-06-28 00:52:32,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 299 transitions, 4335 flow [2024-06-28 00:52:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-06-28 00:52:32,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7093333333333334 [2024-06-28 00:52:32,133 INFO L175 Difference]: Start difference. First operand has 214 places, 276 transitions, 3722 flow. Second operand 5 states and 266 transitions. [2024-06-28 00:52:32,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 299 transitions, 4335 flow [2024-06-28 00:52:32,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 299 transitions, 4237 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:32,543 INFO L231 Difference]: Finished difference. Result has 217 places, 277 transitions, 3728 flow [2024-06-28 00:52:32,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3728, PETRI_PLACES=217, PETRI_TRANSITIONS=277} [2024-06-28 00:52:32,544 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 151 predicate places. [2024-06-28 00:52:32,544 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 277 transitions, 3728 flow [2024-06-28 00:52:32,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:32,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:32,544 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] [2024-06-28 00:52:32,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:52:32,545 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:32,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash -928898769, now seen corresponding path program 2 times [2024-06-28 00:52:32,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:32,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573419823] [2024-06-28 00:52:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:32,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:32,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:32,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573419823] [2024-06-28 00:52:32,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573419823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:32,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:32,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:32,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475722998] [2024-06-28 00:52:32,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:32,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:32,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:32,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:32,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:32,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2024-06-28 00:52:32,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 277 transitions, 3728 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:32,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:32,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2024-06-28 00:52:32,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:33,211 INFO L124 PetriNetUnfolderBase]: 1922/4246 cut-off events. [2024-06-28 00:52:33,211 INFO L125 PetriNetUnfolderBase]: For 115005/115395 co-relation queries the response was YES. [2024-06-28 00:52:33,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25458 conditions, 4246 events. 1922/4246 cut-off events. For 115005/115395 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 32049 event pairs, 660 based on Foata normal form. 159/4226 useless extension candidates. Maximal degree in co-relation 21434. Up to 1660 conditions per place. [2024-06-28 00:52:33,254 INFO L140 encePairwiseOnDemand]: 58/75 looper letters, 110 selfloop transitions, 42 changer transitions 1/303 dead transitions. [2024-06-28 00:52:33,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 303 transitions, 4156 flow [2024-06-28 00:52:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 269 transitions. [2024-06-28 00:52:33,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7173333333333334 [2024-06-28 00:52:33,255 INFO L175 Difference]: Start difference. First operand has 217 places, 277 transitions, 3728 flow. Second operand 5 states and 269 transitions. [2024-06-28 00:52:33,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 303 transitions, 4156 flow [2024-06-28 00:52:33,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 303 transitions, 3961 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 00:52:33,522 INFO L231 Difference]: Finished difference. Result has 215 places, 269 transitions, 3628 flow [2024-06-28 00:52:33,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3628, PETRI_PLACES=215, PETRI_TRANSITIONS=269} [2024-06-28 00:52:33,523 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 149 predicate places. [2024-06-28 00:52:33,523 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 269 transitions, 3628 flow [2024-06-28 00:52:33,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:33,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:33,523 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] [2024-06-28 00:52:33,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:52:33,523 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:33,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:33,524 INFO L85 PathProgramCache]: Analyzing trace with hash -857755619, now seen corresponding path program 3 times [2024-06-28 00:52:33,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:33,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473629726] [2024-06-28 00:52:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:33,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:33,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:33,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473629726] [2024-06-28 00:52:33,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473629726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:33,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:33,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:33,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298211212] [2024-06-28 00:52:33,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:33,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:33,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:33,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:33,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:33,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2024-06-28 00:52:33,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 269 transitions, 3628 flow. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:33,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:33,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2024-06-28 00:52:33,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:34,030 INFO L124 PetriNetUnfolderBase]: 1311/3127 cut-off events. [2024-06-28 00:52:34,030 INFO L125 PetriNetUnfolderBase]: For 79662/80059 co-relation queries the response was YES. [2024-06-28 00:52:34,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18722 conditions, 3127 events. 1311/3127 cut-off events. For 79662/80059 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 22829 event pairs, 647 based on Foata normal form. 120/3114 useless extension candidates. Maximal degree in co-relation 15358. Up to 1663 conditions per place. [2024-06-28 00:52:34,058 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 103 selfloop transitions, 49 changer transitions 1/276 dead transitions. [2024-06-28 00:52:34,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 276 transitions, 3831 flow [2024-06-28 00:52:34,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-06-28 00:52:34,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7013333333333334 [2024-06-28 00:52:34,059 INFO L175 Difference]: Start difference. First operand has 215 places, 269 transitions, 3628 flow. Second operand 5 states and 263 transitions. [2024-06-28 00:52:34,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 276 transitions, 3831 flow [2024-06-28 00:52:34,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 276 transitions, 3577 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-28 00:52:34,244 INFO L231 Difference]: Finished difference. Result has 215 places, 256 transitions, 3314 flow [2024-06-28 00:52:34,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3314, PETRI_PLACES=215, PETRI_TRANSITIONS=256} [2024-06-28 00:52:34,245 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 149 predicate places. [2024-06-28 00:52:34,245 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 256 transitions, 3314 flow [2024-06-28 00:52:34,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:34,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:34,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:34,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:52:34,245 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:34,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1093701351, now seen corresponding path program 1 times [2024-06-28 00:52:34,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:34,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677333042] [2024-06-28 00:52:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:34,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:34,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:34,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677333042] [2024-06-28 00:52:34,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677333042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:34,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:34,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:34,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995290582] [2024-06-28 00:52:34,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:34,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:34,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:34,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:34,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 256 transitions, 3314 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:34,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:34,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:34,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:34,834 INFO L124 PetriNetUnfolderBase]: 1424/3419 cut-off events. [2024-06-28 00:52:34,834 INFO L125 PetriNetUnfolderBase]: For 144533/144758 co-relation queries the response was YES. [2024-06-28 00:52:34,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23154 conditions, 3419 events. 1424/3419 cut-off events. For 144533/144758 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 25139 event pairs, 378 based on Foata normal form. 69/3439 useless extension candidates. Maximal degree in co-relation 22671. Up to 1418 conditions per place. [2024-06-28 00:52:34,868 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 130 selfloop transitions, 25 changer transitions 2/276 dead transitions. [2024-06-28 00:52:34,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 276 transitions, 3866 flow [2024-06-28 00:52:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2024-06-28 00:52:34,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6773333333333333 [2024-06-28 00:52:34,869 INFO L175 Difference]: Start difference. First operand has 215 places, 256 transitions, 3314 flow. Second operand 5 states and 254 transitions. [2024-06-28 00:52:34,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 276 transitions, 3866 flow [2024-06-28 00:52:35,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 276 transitions, 3778 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:35,080 INFO L231 Difference]: Finished difference. Result has 219 places, 258 transitions, 3327 flow [2024-06-28 00:52:35,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3226, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3327, PETRI_PLACES=219, PETRI_TRANSITIONS=258} [2024-06-28 00:52:35,080 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 153 predicate places. [2024-06-28 00:52:35,080 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 258 transitions, 3327 flow [2024-06-28 00:52:35,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:35,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:35,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:35,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:52:35,081 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:35,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:35,081 INFO L85 PathProgramCache]: Analyzing trace with hash 94153764, now seen corresponding path program 1 times [2024-06-28 00:52:35,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:35,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315148025] [2024-06-28 00:52:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:35,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:35,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:35,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315148025] [2024-06-28 00:52:35,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315148025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:35,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:35,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:35,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111081841] [2024-06-28 00:52:35,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:35,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:35,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:35,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:35,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:35,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:35,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 258 transitions, 3327 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:35,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:35,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:35,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:35,634 INFO L124 PetriNetUnfolderBase]: 1406/3355 cut-off events. [2024-06-28 00:52:35,634 INFO L125 PetriNetUnfolderBase]: For 141843/142070 co-relation queries the response was YES. [2024-06-28 00:52:35,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22593 conditions, 3355 events. 1406/3355 cut-off events. For 141843/142070 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 24731 event pairs, 419 based on Foata normal form. 68/3327 useless extension candidates. Maximal degree in co-relation 18625. Up to 1087 conditions per place. [2024-06-28 00:52:35,669 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 128 selfloop transitions, 30 changer transitions 2/279 dead transitions. [2024-06-28 00:52:35,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 279 transitions, 3914 flow [2024-06-28 00:52:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 258 transitions. [2024-06-28 00:52:35,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.688 [2024-06-28 00:52:35,670 INFO L175 Difference]: Start difference. First operand has 219 places, 258 transitions, 3327 flow. Second operand 5 states and 258 transitions. [2024-06-28 00:52:35,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 279 transitions, 3914 flow [2024-06-28 00:52:35,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 279 transitions, 3773 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 00:52:35,922 INFO L231 Difference]: Finished difference. Result has 218 places, 259 transitions, 3278 flow [2024-06-28 00:52:35,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3278, PETRI_PLACES=218, PETRI_TRANSITIONS=259} [2024-06-28 00:52:35,923 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 152 predicate places. [2024-06-28 00:52:35,923 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 259 transitions, 3278 flow [2024-06-28 00:52:35,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:35,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:35,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:35,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:52:35,924 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:35,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:35,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1408417440, now seen corresponding path program 2 times [2024-06-28 00:52:35,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:35,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991411384] [2024-06-28 00:52:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:35,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:35,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:35,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991411384] [2024-06-28 00:52:35,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991411384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:35,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:35,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:35,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147402316] [2024-06-28 00:52:35,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:35,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:35,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:35,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:35,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:36,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:36,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 259 transitions, 3278 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:36,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:36,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:36,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:36,569 INFO L124 PetriNetUnfolderBase]: 1431/3413 cut-off events. [2024-06-28 00:52:36,569 INFO L125 PetriNetUnfolderBase]: For 139214/139453 co-relation queries the response was YES. [2024-06-28 00:52:36,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22778 conditions, 3413 events. 1431/3413 cut-off events. For 139214/139453 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 25023 event pairs, 248 based on Foata normal form. 59/3411 useless extension candidates. Maximal degree in co-relation 21609. Up to 923 conditions per place. [2024-06-28 00:52:36,605 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 132 selfloop transitions, 28 changer transitions 2/281 dead transitions. [2024-06-28 00:52:36,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 281 transitions, 3874 flow [2024-06-28 00:52:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:36,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-06-28 00:52:36,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6906666666666667 [2024-06-28 00:52:36,606 INFO L175 Difference]: Start difference. First operand has 218 places, 259 transitions, 3278 flow. Second operand 5 states and 259 transitions. [2024-06-28 00:52:36,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 281 transitions, 3874 flow [2024-06-28 00:52:36,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 281 transitions, 3795 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:36,850 INFO L231 Difference]: Finished difference. Result has 220 places, 259 transitions, 3267 flow [2024-06-28 00:52:36,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3267, PETRI_PLACES=220, PETRI_TRANSITIONS=259} [2024-06-28 00:52:36,851 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 154 predicate places. [2024-06-28 00:52:36,851 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 259 transitions, 3267 flow [2024-06-28 00:52:36,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:36,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:36,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:36,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:52:36,851 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:36,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:36,852 INFO L85 PathProgramCache]: Analyzing trace with hash -241737146, now seen corresponding path program 1 times [2024-06-28 00:52:36,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:36,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907549272] [2024-06-28 00:52:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:36,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:36,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907549272] [2024-06-28 00:52:36,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907549272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:36,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:36,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:36,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138525927] [2024-06-28 00:52:36,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:36,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:36,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:36,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:36,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:36,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:36,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 259 transitions, 3267 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:36,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:36,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:36,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:37,452 INFO L124 PetriNetUnfolderBase]: 1429/3385 cut-off events. [2024-06-28 00:52:37,452 INFO L125 PetriNetUnfolderBase]: For 137348/137571 co-relation queries the response was YES. [2024-06-28 00:52:37,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22451 conditions, 3385 events. 1429/3385 cut-off events. For 137348/137571 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 24614 event pairs, 462 based on Foata normal form. 65/3381 useless extension candidates. Maximal degree in co-relation 18415. Up to 1142 conditions per place. [2024-06-28 00:52:37,483 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 128 selfloop transitions, 31 changer transitions 1/279 dead transitions. [2024-06-28 00:52:37,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 279 transitions, 3908 flow [2024-06-28 00:52:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2024-06-28 00:52:37,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6773333333333333 [2024-06-28 00:52:37,489 INFO L175 Difference]: Start difference. First operand has 220 places, 259 transitions, 3267 flow. Second operand 5 states and 254 transitions. [2024-06-28 00:52:37,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 279 transitions, 3908 flow [2024-06-28 00:52:37,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 279 transitions, 3786 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 00:52:37,702 INFO L231 Difference]: Finished difference. Result has 219 places, 264 transitions, 3324 flow [2024-06-28 00:52:37,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3151, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3324, PETRI_PLACES=219, PETRI_TRANSITIONS=264} [2024-06-28 00:52:37,703 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 153 predicate places. [2024-06-28 00:52:37,703 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 264 transitions, 3324 flow [2024-06-28 00:52:37,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:37,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:37,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:37,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:52:37,703 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:37,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:37,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1871600358, now seen corresponding path program 1 times [2024-06-28 00:52:37,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:37,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692862786] [2024-06-28 00:52:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:37,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:37,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:37,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692862786] [2024-06-28 00:52:37,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692862786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:37,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:37,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:37,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068824365] [2024-06-28 00:52:37,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:37,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:37,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:37,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2024-06-28 00:52:37,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 264 transitions, 3324 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:37,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:37,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2024-06-28 00:52:37,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:38,185 INFO L124 PetriNetUnfolderBase]: 1196/2819 cut-off events. [2024-06-28 00:52:38,185 INFO L125 PetriNetUnfolderBase]: For 55774/56037 co-relation queries the response was YES. [2024-06-28 00:52:38,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15858 conditions, 2819 events. 1196/2819 cut-off events. For 55774/56037 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 19834 event pairs, 645 based on Foata normal form. 69/2793 useless extension candidates. Maximal degree in co-relation 13638. Up to 1650 conditions per place. [2024-06-28 00:52:38,211 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 113 selfloop transitions, 28 changer transitions 1/250 dead transitions. [2024-06-28 00:52:38,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 250 transitions, 3357 flow [2024-06-28 00:52:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 256 transitions. [2024-06-28 00:52:38,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826666666666666 [2024-06-28 00:52:38,214 INFO L175 Difference]: Start difference. First operand has 219 places, 264 transitions, 3324 flow. Second operand 5 states and 256 transitions. [2024-06-28 00:52:38,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 250 transitions, 3357 flow [2024-06-28 00:52:38,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 250 transitions, 3182 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 00:52:38,394 INFO L231 Difference]: Finished difference. Result has 216 places, 233 transitions, 2828 flow [2024-06-28 00:52:38,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2828, PETRI_PLACES=216, PETRI_TRANSITIONS=233} [2024-06-28 00:52:38,395 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 150 predicate places. [2024-06-28 00:52:38,395 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 233 transitions, 2828 flow [2024-06-28 00:52:38,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:38,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:38,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:38,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:52:38,396 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:38,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1231873310, now seen corresponding path program 1 times [2024-06-28 00:52:38,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:38,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600631585] [2024-06-28 00:52:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:38,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:38,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:38,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600631585] [2024-06-28 00:52:38,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600631585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:38,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:38,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:38,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181701148] [2024-06-28 00:52:38,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:38,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:38,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:38,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:38,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:38,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:38,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 233 transitions, 2828 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:38,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:38,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:38,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:38,867 INFO L124 PetriNetUnfolderBase]: 1131/2787 cut-off events. [2024-06-28 00:52:38,867 INFO L125 PetriNetUnfolderBase]: For 93973/94115 co-relation queries the response was YES. [2024-06-28 00:52:38,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17022 conditions, 2787 events. 1131/2787 cut-off events. For 93973/94115 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 20027 event pairs, 347 based on Foata normal form. 39/2775 useless extension candidates. Maximal degree in co-relation 15552. Up to 835 conditions per place. [2024-06-28 00:52:38,895 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 114 selfloop transitions, 34 changer transitions 1/253 dead transitions. [2024-06-28 00:52:38,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 253 transitions, 3400 flow [2024-06-28 00:52:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-06-28 00:52:38,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6853333333333333 [2024-06-28 00:52:38,896 INFO L175 Difference]: Start difference. First operand has 216 places, 233 transitions, 2828 flow. Second operand 5 states and 257 transitions. [2024-06-28 00:52:38,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 253 transitions, 3400 flow [2024-06-28 00:52:39,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 253 transitions, 3305 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:39,063 INFO L231 Difference]: Finished difference. Result has 219 places, 236 transitions, 2866 flow [2024-06-28 00:52:39,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2733, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2866, PETRI_PLACES=219, PETRI_TRANSITIONS=236} [2024-06-28 00:52:39,064 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 153 predicate places. [2024-06-28 00:52:39,064 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 236 transitions, 2866 flow [2024-06-28 00:52:39,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:39,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:39,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:39,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:52:39,065 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:39,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:39,065 INFO L85 PathProgramCache]: Analyzing trace with hash 200363948, now seen corresponding path program 2 times [2024-06-28 00:52:39,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:39,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892146138] [2024-06-28 00:52:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:39,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:39,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:39,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892146138] [2024-06-28 00:52:39,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892146138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:39,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:39,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:39,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351097307] [2024-06-28 00:52:39,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:39,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:39,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:39,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:39,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 236 transitions, 2866 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:39,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:39,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:39,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:39,523 INFO L124 PetriNetUnfolderBase]: 1106/2750 cut-off events. [2024-06-28 00:52:39,524 INFO L125 PetriNetUnfolderBase]: For 94213/94352 co-relation queries the response was YES. [2024-06-28 00:52:39,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16259 conditions, 2750 events. 1106/2750 cut-off events. For 94213/94352 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 19783 event pairs, 348 based on Foata normal form. 53/2751 useless extension candidates. Maximal degree in co-relation 14943. Up to 860 conditions per place. [2024-06-28 00:52:39,550 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 125 selfloop transitions, 26 changer transitions 1/256 dead transitions. [2024-06-28 00:52:39,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 256 transitions, 3461 flow [2024-06-28 00:52:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-06-28 00:52:39,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6906666666666667 [2024-06-28 00:52:39,551 INFO L175 Difference]: Start difference. First operand has 219 places, 236 transitions, 2866 flow. Second operand 5 states and 259 transitions. [2024-06-28 00:52:39,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 256 transitions, 3461 flow [2024-06-28 00:52:39,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 256 transitions, 3399 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:39,706 INFO L231 Difference]: Finished difference. Result has 223 places, 239 transitions, 2960 flow [2024-06-28 00:52:39,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2960, PETRI_PLACES=223, PETRI_TRANSITIONS=239} [2024-06-28 00:52:39,707 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 157 predicate places. [2024-06-28 00:52:39,707 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 239 transitions, 2960 flow [2024-06-28 00:52:39,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:39,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:39,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:39,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:52:39,708 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:39,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1591131256, now seen corresponding path program 1 times [2024-06-28 00:52:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:39,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856614053] [2024-06-28 00:52:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856614053] [2024-06-28 00:52:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856614053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:39,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:39,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467571508] [2024-06-28 00:52:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:39,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:39,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 239 transitions, 2960 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:39,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:39,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:39,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:40,199 INFO L124 PetriNetUnfolderBase]: 1111/2781 cut-off events. [2024-06-28 00:52:40,199 INFO L125 PetriNetUnfolderBase]: For 84816/84944 co-relation queries the response was YES. [2024-06-28 00:52:40,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16267 conditions, 2781 events. 1111/2781 cut-off events. For 84816/84944 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 20129 event pairs, 334 based on Foata normal form. 41/2775 useless extension candidates. Maximal degree in co-relation 14933. Up to 835 conditions per place. [2024-06-28 00:52:40,224 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 111 selfloop transitions, 35 changer transitions 9/255 dead transitions. [2024-06-28 00:52:40,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 255 transitions, 3471 flow [2024-06-28 00:52:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2024-06-28 00:52:40,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-28 00:52:40,225 INFO L175 Difference]: Start difference. First operand has 223 places, 239 transitions, 2960 flow. Second operand 5 states and 255 transitions. [2024-06-28 00:52:40,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 255 transitions, 3471 flow [2024-06-28 00:52:40,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 255 transitions, 3389 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:40,426 INFO L231 Difference]: Finished difference. Result has 225 places, 231 transitions, 2847 flow [2024-06-28 00:52:40,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2847, PETRI_PLACES=225, PETRI_TRANSITIONS=231} [2024-06-28 00:52:40,427 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 159 predicate places. [2024-06-28 00:52:40,427 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 231 transitions, 2847 flow [2024-06-28 00:52:40,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:40,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:40,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:40,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:52:40,427 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:40,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:40,428 INFO L85 PathProgramCache]: Analyzing trace with hash 94422668, now seen corresponding path program 2 times [2024-06-28 00:52:40,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:40,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845483461] [2024-06-28 00:52:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:40,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:40,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:40,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845483461] [2024-06-28 00:52:40,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845483461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:40,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:40,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:40,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264949893] [2024-06-28 00:52:40,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:40,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:40,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:40,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:40,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:40,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 231 transitions, 2847 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:40,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:40,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:40,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:40,943 INFO L124 PetriNetUnfolderBase]: 1085/2746 cut-off events. [2024-06-28 00:52:40,943 INFO L125 PetriNetUnfolderBase]: For 81333/81453 co-relation queries the response was YES. [2024-06-28 00:52:40,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15836 conditions, 2746 events. 1085/2746 cut-off events. For 81333/81453 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 19921 event pairs, 347 based on Foata normal form. 36/2737 useless extension candidates. Maximal degree in co-relation 14579. Up to 868 conditions per place. [2024-06-28 00:52:40,968 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 104 selfloop transitions, 18 changer transitions 35/244 dead transitions. [2024-06-28 00:52:40,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 244 transitions, 3327 flow [2024-06-28 00:52:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:40,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 252 transitions. [2024-06-28 00:52:40,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.672 [2024-06-28 00:52:40,970 INFO L175 Difference]: Start difference. First operand has 225 places, 231 transitions, 2847 flow. Second operand 5 states and 252 transitions. [2024-06-28 00:52:40,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 244 transitions, 3327 flow [2024-06-28 00:52:41,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 244 transitions, 3181 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:52:41,159 INFO L231 Difference]: Finished difference. Result has 224 places, 198 transitions, 2331 flow [2024-06-28 00:52:41,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2331, PETRI_PLACES=224, PETRI_TRANSITIONS=198} [2024-06-28 00:52:41,160 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 158 predicate places. [2024-06-28 00:52:41,160 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 198 transitions, 2331 flow [2024-06-28 00:52:41,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:41,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:41,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:52:41,160 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:41,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1545084690, now seen corresponding path program 2 times [2024-06-28 00:52:41,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:41,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524504102] [2024-06-28 00:52:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:41,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:41,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:41,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524504102] [2024-06-28 00:52:41,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524504102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:41,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:41,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:41,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109082645] [2024-06-28 00:52:41,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:41,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:41,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:41,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:41,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2024-06-28 00:52:41,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 198 transitions, 2331 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:41,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2024-06-28 00:52:41,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:41,443 INFO L124 PetriNetUnfolderBase]: 733/1847 cut-off events. [2024-06-28 00:52:41,443 INFO L125 PetriNetUnfolderBase]: For 29645/29750 co-relation queries the response was YES. [2024-06-28 00:52:41,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9383 conditions, 1847 events. 733/1847 cut-off events. For 29645/29750 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12497 event pairs, 439 based on Foata normal form. 45/1836 useless extension candidates. Maximal degree in co-relation 9020. Up to 1073 conditions per place. [2024-06-28 00:52:41,458 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 62 selfloop transitions, 0 changer transitions 50/174 dead transitions. [2024-06-28 00:52:41,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 174 transitions, 2212 flow [2024-06-28 00:52:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-28 00:52:41,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648 [2024-06-28 00:52:41,459 INFO L175 Difference]: Start difference. First operand has 224 places, 198 transitions, 2331 flow. Second operand 5 states and 243 transitions. [2024-06-28 00:52:41,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 174 transitions, 2212 flow [2024-06-28 00:52:41,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 174 transitions, 1928 flow, removed 29 selfloop flow, removed 23 redundant places. [2024-06-28 00:52:41,546 INFO L231 Difference]: Finished difference. Result has 201 places, 124 transitions, 1251 flow [2024-06-28 00:52:41,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1251, PETRI_PLACES=201, PETRI_TRANSITIONS=124} [2024-06-28 00:52:41,547 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 135 predicate places. [2024-06-28 00:52:41,547 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 124 transitions, 1251 flow [2024-06-28 00:52:41,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:41,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:41,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:52:41,548 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:41,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:41,548 INFO L85 PathProgramCache]: Analyzing trace with hash 830788142, now seen corresponding path program 2 times [2024-06-28 00:52:41,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:41,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97893040] [2024-06-28 00:52:41,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:41,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:41,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:41,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97893040] [2024-06-28 00:52:41,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97893040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:41,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:41,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162184768] [2024-06-28 00:52:41,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:41,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:41,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:41,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 124 transitions, 1251 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:41,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:41,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:41,789 INFO L124 PetriNetUnfolderBase]: 467/1283 cut-off events. [2024-06-28 00:52:41,789 INFO L125 PetriNetUnfolderBase]: For 30537/30605 co-relation queries the response was YES. [2024-06-28 00:52:41,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6414 conditions, 1283 events. 467/1283 cut-off events. For 30537/30605 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 7980 event pairs, 198 based on Foata normal form. 34/1303 useless extension candidates. Maximal degree in co-relation 6345. Up to 458 conditions per place. [2024-06-28 00:52:41,799 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 58 selfloop transitions, 10 changer transitions 34/135 dead transitions. [2024-06-28 00:52:41,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 135 transitions, 1587 flow [2024-06-28 00:52:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-06-28 00:52:41,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-28 00:52:41,800 INFO L175 Difference]: Start difference. First operand has 201 places, 124 transitions, 1251 flow. Second operand 5 states and 245 transitions. [2024-06-28 00:52:41,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 135 transitions, 1587 flow [2024-06-28 00:52:41,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 135 transitions, 1449 flow, removed 45 selfloop flow, removed 16 redundant places. [2024-06-28 00:52:41,843 INFO L231 Difference]: Finished difference. Result has 175 places, 93 transitions, 899 flow [2024-06-28 00:52:41,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=899, PETRI_PLACES=175, PETRI_TRANSITIONS=93} [2024-06-28 00:52:41,843 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 109 predicate places. [2024-06-28 00:52:41,843 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 93 transitions, 899 flow [2024-06-28 00:52:41,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:41,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:41,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:52:41,844 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:41,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:41,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1915978206, now seen corresponding path program 1 times [2024-06-28 00:52:41,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:41,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787028787] [2024-06-28 00:52:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:41,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:41,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:41,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787028787] [2024-06-28 00:52:41,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787028787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:41,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:41,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:41,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953169066] [2024-06-28 00:52:41,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:41,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:41,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:41,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:41,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:41,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 93 transitions, 899 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:41,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:41,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:42,079 INFO L124 PetriNetUnfolderBase]: 389/1020 cut-off events. [2024-06-28 00:52:42,079 INFO L125 PetriNetUnfolderBase]: For 20807/20868 co-relation queries the response was YES. [2024-06-28 00:52:42,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4809 conditions, 1020 events. 389/1020 cut-off events. For 20807/20868 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5931 event pairs, 249 based on Foata normal form. 33/1032 useless extension candidates. Maximal degree in co-relation 4751. Up to 586 conditions per place. [2024-06-28 00:52:42,086 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 58 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2024-06-28 00:52:42,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 106 transitions, 1143 flow [2024-06-28 00:52:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-28 00:52:42,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648 [2024-06-28 00:52:42,087 INFO L175 Difference]: Start difference. First operand has 175 places, 93 transitions, 899 flow. Second operand 5 states and 243 transitions. [2024-06-28 00:52:42,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 106 transitions, 1143 flow [2024-06-28 00:52:42,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 106 transitions, 1013 flow, removed 31 selfloop flow, removed 17 redundant places. [2024-06-28 00:52:42,108 INFO L231 Difference]: Finished difference. Result has 147 places, 94 transitions, 832 flow [2024-06-28 00:52:42,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=832, PETRI_PLACES=147, PETRI_TRANSITIONS=94} [2024-06-28 00:52:42,108 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 81 predicate places. [2024-06-28 00:52:42,109 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 94 transitions, 832 flow [2024-06-28 00:52:42,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:42,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:42,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:52:42,109 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:42,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1219841048, now seen corresponding path program 2 times [2024-06-28 00:52:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:42,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477166893] [2024-06-28 00:52:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:42,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:42,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477166893] [2024-06-28 00:52:42,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477166893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:42,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:42,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:42,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369717153] [2024-06-28 00:52:42,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:42,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:42,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:42,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:42,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 94 transitions, 832 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:42,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:42,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:42,309 INFO L124 PetriNetUnfolderBase]: 397/1048 cut-off events. [2024-06-28 00:52:42,309 INFO L125 PetriNetUnfolderBase]: For 12549/12611 co-relation queries the response was YES. [2024-06-28 00:52:42,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4184 conditions, 1048 events. 397/1048 cut-off events. For 12549/12611 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6034 event pairs, 179 based on Foata normal form. 36/1073 useless extension candidates. Maximal degree in co-relation 4135. Up to 450 conditions per place. [2024-06-28 00:52:42,315 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 63 selfloop transitions, 12 changer transitions 1/109 dead transitions. [2024-06-28 00:52:42,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 109 transitions, 1127 flow [2024-06-28 00:52:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 247 transitions. [2024-06-28 00:52:42,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586666666666666 [2024-06-28 00:52:42,316 INFO L175 Difference]: Start difference. First operand has 147 places, 94 transitions, 832 flow. Second operand 5 states and 247 transitions. [2024-06-28 00:52:42,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 109 transitions, 1127 flow [2024-06-28 00:52:42,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 109 transitions, 1098 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:42,334 INFO L231 Difference]: Finished difference. Result has 148 places, 95 transitions, 843 flow [2024-06-28 00:52:42,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=843, PETRI_PLACES=148, PETRI_TRANSITIONS=95} [2024-06-28 00:52:42,334 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 82 predicate places. [2024-06-28 00:52:42,334 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 95 transitions, 843 flow [2024-06-28 00:52:42,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:42,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:42,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:52:42,335 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:42,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1219901498, now seen corresponding path program 3 times [2024-06-28 00:52:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:42,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072447544] [2024-06-28 00:52:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:42,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:42,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072447544] [2024-06-28 00:52:42,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072447544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:42,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:42,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:42,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461561663] [2024-06-28 00:52:42,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:42,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:42,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:42,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:42,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:42,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 95 transitions, 843 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:42,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:42,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:42,517 INFO L124 PetriNetUnfolderBase]: 389/1038 cut-off events. [2024-06-28 00:52:42,517 INFO L125 PetriNetUnfolderBase]: For 10773/10839 co-relation queries the response was YES. [2024-06-28 00:52:42,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 1038 events. 389/1038 cut-off events. For 10773/10839 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5987 event pairs, 181 based on Foata normal form. 30/1058 useless extension candidates. Maximal degree in co-relation 4059. Up to 450 conditions per place. [2024-06-28 00:52:42,523 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 57 selfloop transitions, 15 changer transitions 2/107 dead transitions. [2024-06-28 00:52:42,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 107 transitions, 1075 flow [2024-06-28 00:52:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-28 00:52:42,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506666666666666 [2024-06-28 00:52:42,525 INFO L175 Difference]: Start difference. First operand has 148 places, 95 transitions, 843 flow. Second operand 5 states and 244 transitions. [2024-06-28 00:52:42,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 107 transitions, 1075 flow [2024-06-28 00:52:42,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 107 transitions, 1043 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:42,544 INFO L231 Difference]: Finished difference. Result has 150 places, 95 transitions, 845 flow [2024-06-28 00:52:42,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=845, PETRI_PLACES=150, PETRI_TRANSITIONS=95} [2024-06-28 00:52:42,545 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 84 predicate places. [2024-06-28 00:52:42,545 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 95 transitions, 845 flow [2024-06-28 00:52:42,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:42,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:42,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:52:42,545 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:42,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash 401807442, now seen corresponding path program 1 times [2024-06-28 00:52:42,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:42,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503268659] [2024-06-28 00:52:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:42,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:42,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:42,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503268659] [2024-06-28 00:52:42,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503268659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:42,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:42,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:42,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288255505] [2024-06-28 00:52:42,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:42,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:42,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:42,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:42,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:42,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:42,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 95 transitions, 845 flow. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:42,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:42,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:42,740 INFO L124 PetriNetUnfolderBase]: 374/1023 cut-off events. [2024-06-28 00:52:42,740 INFO L125 PetriNetUnfolderBase]: For 9579/9638 co-relation queries the response was YES. [2024-06-28 00:52:42,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3905 conditions, 1023 events. 374/1023 cut-off events. For 9579/9638 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5973 event pairs, 95 based on Foata normal form. 34/1049 useless extension candidates. Maximal degree in co-relation 3857. Up to 340 conditions per place. [2024-06-28 00:52:42,745 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 53 selfloop transitions, 22 changer transitions 2/110 dead transitions. [2024-06-28 00:52:42,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 110 transitions, 1129 flow [2024-06-28 00:52:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 249 transitions. [2024-06-28 00:52:42,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.664 [2024-06-28 00:52:42,746 INFO L175 Difference]: Start difference. First operand has 150 places, 95 transitions, 845 flow. Second operand 5 states and 249 transitions. [2024-06-28 00:52:42,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 110 transitions, 1129 flow [2024-06-28 00:52:42,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 110 transitions, 1098 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:42,764 INFO L231 Difference]: Finished difference. Result has 151 places, 95 transitions, 867 flow [2024-06-28 00:52:42,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=867, PETRI_PLACES=151, PETRI_TRANSITIONS=95} [2024-06-28 00:52:42,764 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 85 predicate places. [2024-06-28 00:52:42,765 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 95 transitions, 867 flow [2024-06-28 00:52:42,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:42,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:42,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:52:42,765 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:42,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:42,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1849005290, now seen corresponding path program 1 times [2024-06-28 00:52:42,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:42,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102344794] [2024-06-28 00:52:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:42,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:42,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102344794] [2024-06-28 00:52:42,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102344794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:42,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:42,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:42,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021685514] [2024-06-28 00:52:42,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:42,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:42,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:42,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:42,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:42,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:42,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 95 transitions, 867 flow. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:42,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:42,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:42,955 INFO L124 PetriNetUnfolderBase]: 377/1016 cut-off events. [2024-06-28 00:52:42,955 INFO L125 PetriNetUnfolderBase]: For 10221/10263 co-relation queries the response was YES. [2024-06-28 00:52:42,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3955 conditions, 1016 events. 377/1016 cut-off events. For 10221/10263 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5818 event pairs, 169 based on Foata normal form. 30/1044 useless extension candidates. Maximal degree in co-relation 3906. Up to 440 conditions per place. [2024-06-28 00:52:42,961 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 53 selfloop transitions, 18 changer transitions 2/106 dead transitions. [2024-06-28 00:52:42,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 106 transitions, 1091 flow [2024-06-28 00:52:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 242 transitions. [2024-06-28 00:52:42,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453333333333333 [2024-06-28 00:52:42,962 INFO L175 Difference]: Start difference. First operand has 151 places, 95 transitions, 867 flow. Second operand 5 states and 242 transitions. [2024-06-28 00:52:42,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 106 transitions, 1091 flow [2024-06-28 00:52:42,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 106 transitions, 1043 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:42,983 INFO L231 Difference]: Finished difference. Result has 152 places, 95 transitions, 864 flow [2024-06-28 00:52:42,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=864, PETRI_PLACES=152, PETRI_TRANSITIONS=95} [2024-06-28 00:52:42,983 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 86 predicate places. [2024-06-28 00:52:42,984 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 95 transitions, 864 flow [2024-06-28 00:52:42,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:42,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:42,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:52:42,984 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:42,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2079875995, now seen corresponding path program 1 times [2024-06-28 00:52:42,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:42,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563997445] [2024-06-28 00:52:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:42,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:43,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:43,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563997445] [2024-06-28 00:52:43,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563997445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:43,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:43,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:43,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045273546] [2024-06-28 00:52:43,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:43,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:43,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:43,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:43,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:43,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:43,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 95 transitions, 864 flow. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:43,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:43,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:43,166 INFO L124 PetriNetUnfolderBase]: 356/973 cut-off events. [2024-06-28 00:52:43,166 INFO L125 PetriNetUnfolderBase]: For 7983/8026 co-relation queries the response was YES. [2024-06-28 00:52:43,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3617 conditions, 973 events. 356/973 cut-off events. For 7983/8026 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5573 event pairs, 87 based on Foata normal form. 34/1003 useless extension candidates. Maximal degree in co-relation 3567. Up to 300 conditions per place. [2024-06-28 00:52:43,171 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 37 selfloop transitions, 10 changer transitions 38/109 dead transitions. [2024-06-28 00:52:43,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 109 transitions, 1102 flow [2024-06-28 00:52:43,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 248 transitions. [2024-06-28 00:52:43,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6613333333333333 [2024-06-28 00:52:43,172 INFO L175 Difference]: Start difference. First operand has 152 places, 95 transitions, 864 flow. Second operand 5 states and 248 transitions. [2024-06-28 00:52:43,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 109 transitions, 1102 flow [2024-06-28 00:52:43,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 109 transitions, 1065 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:43,188 INFO L231 Difference]: Finished difference. Result has 154 places, 65 transitions, 561 flow [2024-06-28 00:52:43,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=561, PETRI_PLACES=154, PETRI_TRANSITIONS=65} [2024-06-28 00:52:43,188 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 88 predicate places. [2024-06-28 00:52:43,189 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 65 transitions, 561 flow [2024-06-28 00:52:43,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:43,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:43,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:52:43,189 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:43,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1907193507, now seen corresponding path program 1 times [2024-06-28 00:52:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:43,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024688271] [2024-06-28 00:52:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:43,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:43,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:43,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024688271] [2024-06-28 00:52:43,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024688271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:43,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:43,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:43,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140218684] [2024-06-28 00:52:43,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:43,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:43,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:43,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:43,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:43,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:43,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 65 transitions, 561 flow. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:43,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:43,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:43,331 INFO L124 PetriNetUnfolderBase]: 173/460 cut-off events. [2024-06-28 00:52:43,331 INFO L125 PetriNetUnfolderBase]: For 6349/6371 co-relation queries the response was YES. [2024-06-28 00:52:43,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 460 events. 173/460 cut-off events. For 6349/6371 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1960 event pairs, 54 based on Foata normal form. 18/465 useless extension candidates. Maximal degree in co-relation 1882. Up to 155 conditions per place. [2024-06-28 00:52:43,333 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 34 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-28 00:52:43,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 70 transitions, 663 flow [2024-06-28 00:52:43,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-06-28 00:52:43,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186666666666667 [2024-06-28 00:52:43,334 INFO L175 Difference]: Start difference. First operand has 154 places, 65 transitions, 561 flow. Second operand 5 states and 232 transitions. [2024-06-28 00:52:43,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 70 transitions, 663 flow [2024-06-28 00:52:43,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 70 transitions, 490 flow, removed 19 selfloop flow, removed 44 redundant places. [2024-06-28 00:52:43,343 INFO L231 Difference]: Finished difference. Result has 100 places, 65 transitions, 416 flow [2024-06-28 00:52:43,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=416, PETRI_PLACES=100, PETRI_TRANSITIONS=65} [2024-06-28 00:52:43,343 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2024-06-28 00:52:43,343 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 65 transitions, 416 flow [2024-06-28 00:52:43,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:43,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:43,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:52:43,344 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:52:43,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash -272269859, now seen corresponding path program 1 times [2024-06-28 00:52:43,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:43,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235929403] [2024-06-28 00:52:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:43,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:43,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:43,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235929403] [2024-06-28 00:52:43,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235929403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:43,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:43,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:43,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010904178] [2024-06-28 00:52:43,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:43,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:43,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:43,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:43,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:43,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-06-28 00:52:43,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 65 transitions, 416 flow. Second operand has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:43,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-06-28 00:52:43,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:43,467 INFO L124 PetriNetUnfolderBase]: 151/429 cut-off events. [2024-06-28 00:52:43,467 INFO L125 PetriNetUnfolderBase]: For 2149/2175 co-relation queries the response was YES. [2024-06-28 00:52:43,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 429 events. 151/429 cut-off events. For 2149/2175 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1892 event pairs, 64 based on Foata normal form. 30/453 useless extension candidates. Maximal degree in co-relation 1254. Up to 154 conditions per place. [2024-06-28 00:52:43,469 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 0 selfloop transitions, 0 changer transitions 69/69 dead transitions. [2024-06-28 00:52:43,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 69 transitions, 480 flow [2024-06-28 00:52:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-06-28 00:52:43,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-28 00:52:43,469 INFO L175 Difference]: Start difference. First operand has 100 places, 65 transitions, 416 flow. Second operand 5 states and 230 transitions. [2024-06-28 00:52:43,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 69 transitions, 480 flow [2024-06-28 00:52:43,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 69 transitions, 404 flow, removed 0 selfloop flow, removed 21 redundant places. [2024-06-28 00:52:43,472 INFO L231 Difference]: Finished difference. Result has 82 places, 0 transitions, 0 flow [2024-06-28 00:52:43,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=82, PETRI_TRANSITIONS=0} [2024-06-28 00:52:43,472 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2024-06-28 00:52:43,472 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 0 transitions, 0 flow [2024-06-28 00:52:43,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,475 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 8 remaining) [2024-06-28 00:52:43,475 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-06-28 00:52:43,475 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 8 remaining) [2024-06-28 00:52:43,475 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 8 remaining) [2024-06-28 00:52:43,475 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 8 remaining) [2024-06-28 00:52:43,475 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 8 remaining) [2024-06-28 00:52:43,476 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-06-28 00:52:43,476 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-06-28 00:52:43,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:52:43,476 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:43,480 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 00:52:43,480 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 00:52:43,483 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-28 00:52:43,483 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-28 00:52:43,484 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 12:52:43 BasicIcfg [2024-06-28 00:52:43,484 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 00:52:43,484 INFO L158 Benchmark]: Toolchain (without parser) took 42902.87ms. Allocated memory was 165.7MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 91.7MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2024-06-28 00:52:43,484 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory was 75.0MB in the beginning and 74.9MB in the end (delta: 157.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 00:52:43,484 INFO L158 Benchmark]: Witness Parser took 0.12ms. Allocated memory is still 165.7MB. Free memory is still 94.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:52:43,485 INFO L158 Benchmark]: CACSL2BoogieTranslator took 429.08ms. Allocated memory is still 165.7MB. Free memory was 91.4MB in the beginning and 64.8MB in the end (delta: 26.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-28 00:52:43,485 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.77ms. Allocated memory is still 165.7MB. Free memory was 64.8MB in the beginning and 137.4MB in the end (delta: -72.5MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2024-06-28 00:52:43,485 INFO L158 Benchmark]: Boogie Preprocessor took 44.25ms. Allocated memory is still 165.7MB. Free memory was 137.4MB in the beginning and 134.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 00:52:43,485 INFO L158 Benchmark]: RCFGBuilder took 358.54ms. Allocated memory is still 165.7MB. Free memory was 134.8MB in the beginning and 113.8MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-28 00:52:43,485 INFO L158 Benchmark]: TraceAbstraction took 42018.96ms. Allocated memory was 165.7MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 113.3MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2024-06-28 00:52:43,486 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory was 75.0MB in the beginning and 74.9MB in the end (delta: 157.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Witness Parser took 0.12ms. Allocated memory is still 165.7MB. Free memory is still 94.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 429.08ms. Allocated memory is still 165.7MB. Free memory was 91.4MB in the beginning and 64.8MB in the end (delta: 26.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.77ms. Allocated memory is still 165.7MB. Free memory was 64.8MB in the beginning and 137.4MB in the end (delta: -72.5MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.25ms. Allocated memory is still 165.7MB. Free memory was 137.4MB in the beginning and 134.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 358.54ms. Allocated memory is still 165.7MB. Free memory was 134.8MB in the beginning and 113.8MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 42018.96ms. Allocated memory was 165.7MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 113.3MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 802]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 745]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 819]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 820]: 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 5 procedures, 116 locations, 8 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: 41.9s, OverallIterations: 59, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 38.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7343 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4683 mSDsluCounter, 2669 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1873 mSDsCounter, 450 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9277 IncrementalHoareTripleChecker+Invalid, 9727 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 450 mSolverCounterUnsat, 796 mSDtfsCounter, 9277 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3728occurred in iteration=38, InterpolantAutomatonStates: 287, 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, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 1154 NumberOfCodeBlocks, 1154 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 1095 ConstructedInterpolants, 0 QuantifiedInterpolants, 3694 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 59 InterpolantComputations, 59 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 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-28 00:52:43,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE